ASME-B94[1].11M-麻花钻
ASME B94.11M-1993TWIST DRILLSASME B94.1M-1993 (REVISION OF ANSI B94.11-1979) （ANSI B94.11-1979 修订版）Twist Drills 麻花钻AN AMERICAN NATIONAL STANDARD 美国国家标准The American Society of Mechanical Engineers 美国机械工程师学会COPYRIGHT American Society of Mechanical Engineers 版权所有 美国机械工程师学会 Licensed by Information Handling Services 美国信息处理服务公司许可COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSAN AMERICAN NATIONAL STANDARD 美国国家标准Twist Drills 麻花钻ASME B94.1 IM-I993 (REVISION OF ANSI B94.11-1979) （ANSI B94.11-1979 修订版） The American Society of Mechanical Engineers 美国机械工程师学会 345 East 47th Street, New York, N.Y. 10017 纽约东47大街345号，邮编：10017COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSDate of issuance: March 31, 1994 颁布日期：日 This Standard will be revised when the Society approves the issuance of a new edition. There will be no addenda or written interpretations of the requirements of this Standard issued to this Edition. 本标准于本学会批准颁布新版之时进行修订。本版中无对本标准的要求所进行的补充或书面说明。ASME is the registered trademark of The American Society of Mechanical Engineers. ASME为美国机械工程师学会注册商标。 This code or standard was developed under procedures accredited as meeting the criteria for American National Standards. The Consensus Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. The proposed code or standard was made available for public review and comment which provides an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large. 本规范或标准按照符合美国国家标准的认可程序制定。批准本规范或标准的协调委员会均衡确保有效的及 相关利益个体能够有机会参与其中。拟定的规定或标准允许公众的检查及意见，这为从行业、学术、管理 机构及社会大众中获取额外的公众参与提供了机会。 ASME does not &approve,& &rate,& or &endorse& any item, construction, proprietary device, or activity. ASME不会“批准”、“评定”或“签署”任何条款、结构、专门的设备或行动。 ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable Letters Patent, nor assume any such liability. Users of a code or standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility. ASME不会决定声称与本文件中提及的任何条款有关的专利权的有效性，也不会同意确保任何人利用标准 防止违反任何适用的专利证书的责任，也不会承担任何此类责任。向法规或标准的用户明确告对任何知此 类专利权有效性的鉴定以及违反上述权利的风险是其职责。 Participation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard. 联邦机构代表或行业附属人员的参与不能理解为政府或行业对本法规或标准的认可。COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSASME accepts responsibility for only those interpretations issued in accordance with governing ASME procedures and policies which preclude the issuance of interpretations by individual volunteers. ASME仅对根据适用ASME程序及政策发布的说明负责，排除个人志愿者发布的说明。No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. 无发行人的书面许可，禁止意外任何形式，禁止在电子检索系统或其他方式复制本文件的任何部分。Copyright@1994 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved 美国机械工程师学会1994版权所有 Printed in U.S.A. 美国印刷COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSFOREWORD 前言 (This Foreword is not a part of ASME B94.11 M-1993.) （此前沿部分非ASME B94.11 M1993部分） The U.S.A. Standard Twist Drills-Straight Shank (USASI B5-12-1940) Standardized Drill Nomenclature and Major Dimensions, Technical Committee No. 7 on Twist Drills was established in 1946 and a revision dated March 22, 1950 was issued. 美国标准“麻花钻-直柄（USASI B5-12-1940）”对钻头术语和主要尺寸进行了标准化，麻花钻技术委员会 于1946年成立，于日发布修订版。 The committee was reactivated in 1956 and a revision dated December 15, 1958 was issued. 本委员会于1956年重新组建并于日发布修订版。 The committee was again reactivated in 1964 and a re-designated USAS B94.11-1967 was issued on May 4, 1967. 本委员会又于1964年重新组建，并于日发布了重新命名的USAS B94.11-1967。 The above standard was reaffirmed in 1972 as ANSI B94.11-1967 (R1972). 以上标准于1972年重新确定为ANSI B94.11-)。 Technical Committee No. 7 was again reactivated in March 1978 for the purpose of reviewing ANSI B94.11-1967 (R1972) and considered a proposed Inch and Metric Standard submitted by the Metal Cutting Tool Institute and industry that reflects current U.S. drill usage. The proposal added metric sizes in jobbers series, screw machine series, taper length series, and taper shank series that were reflective of current industry practices and usage patterns. Metric sizes were not included for core drills, and combined drills and countersinks. In addition the entire standard was dual-dimensioned because of the metric additions. The suggestions were reviewed and a draft was approved by the Technical Committee on November 15, 1978 for submission to sectional committee B94 and sponsor organizations of ANSI. The revision was approved by the American National Standards Institute on August 29, 1979 and re-designated ANSI B94.11M-1979. 第7技术委员会于1978年3月重新组建用于检查ANSI B94.11-1967 （R1972）并考察金属切削工具学会提 交的一项拟定的反映当前在美国的钻头用途的英制和公制标准。此提议在反映当前行业实践和应用模式的 jobbers类、螺丝车床类、锥长类和锥柄类中增加了米制尺寸。米制尺寸不包括在空心钻、双用钻头及锪钻 中。 此外由于增加了公制单位使得整个标准都是双尺寸的。 本技术委员会于日对建议进行了 复审并批准了一份草案用以向B94分会和ANSI发起组织提交。修订版于日由美国国家标准学 会批准并重新指定为ANSI B94.11M-1979。COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSFollowing the resignation and retirement of all but one of the members of the Technical Committee No. 7, new members were recruited so that revisions suggested by members of the United States Cutting Tool Institute could be considered. A draft of the results of the committee’s deliberations was approved by the committee on February 28, 1991. In addition to dealing with the USCTI suggestions, the committee also corrected many numerical and editorial errors. Other changes, designed to make this document easier to use, were also recommended. The recommended revision was approved by the American National Standards Institute on September 29,1993 and was re-designated ASME B94.11M-1993. 在除第7技术委员会中一个成员之外所有成员退职之后，补充新的成员考虑美国切削工具协会成员提议进 行的修订。本委员会商议结果的草稿于日获委员会批准。除了处理USCII建议之外，本委员 会纠正了许多数字和编辑错误。也建议进行其他更改用于使本文件易于使用。建议的版本于 日获美国国家标准学会批准，并重新命名为ASME B94.11M-1993。COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSASME STANDARDS COMMITTEE B94 ASME标准委员会B94 Standardization of Cutting Tools, Holders, Drivers and Bushings 切削工具、夹具、传动装置和轴管的标准化 (The following is the roster of the Committee at the time of approval of this Standard.) （以下是本标准获批准时的委员会名单。 ） OFFICERS 主管 E.J. Czopor, Chairman E.J. Czopor, 主席 E.W. McLaren, Secretary E.W. McLaren, 干事 COMMIITEE PERSONNEL 委员会全体人员 E. J. Czopor, E & S Sales, Inc., Bloomfield Hills, Michigan E. J. Czopor, 密歇根州Bloomfield Hills市E&S销售公司 M. E. Merchant, Metcut Res Associates, Inc., Cincinnati, Ohio M. E. Merchant, 俄亥俄州辛辛那提市Metcut Res Associates, Inc公司 C. W. Preuss, Kingsford Broach and Tool, Inc., Westlake, Ohio C. W. Preuss, 俄亥俄州西湖城Kingsford Broach and Tool , Inc公司 J. R. Strolberg, Rockton, Illinois J. R. Strolberg, 伊利诺伊州Rockton A. M. Bratkovich, Alternate, NMTBA, McLean, VirginiaCOPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSA. M. Bratkovich, 佛吉尼亚州McLean市Alternate， NMTBA TECHNICAL COMMITTEE 7-TWIST DRILLS 麻花钻技术委员会 C. T. Wax, Chairman, Scully-Jones Corp., Chicago, Illinois C. T. Wax, 伊利诺斯州芝加哥市Scully-Jones Corp.公司主席 P. Field, Michigan Drill Co., Miami, Florida P. Field, 佛罗里达州迈阿密市Michigan Drill Co.公司 R. C. Gulbrandsen, Precision Twist Drill Co., Crystal Lake, Illinois R. C. Gulbrandsen, 伊利诺伊州Crystal Lake，Precision Twist Drill Co.公司 M. N. Jarvis II, Jarvis Cutting Tools, Inc., qochester, New Hampshire M. N. Jarvis II, 新罕布什尔州Rochester市，Jarvis Cutting Tools, Inc.公司 D. L. Lewis, Kennametal, Inc., Raleigh, North Carolina D. L. Lewis, 北卡罗来纳州Raleigh市Kennametal, Inc.公司 R. E. Moring, Greenfield Industries, Augusta, Georgia R. E. Moring, 佐治亚州奥古斯塔Greenfield Industries公司 C. W. Preuss, Kingsford Broach and Tool, Inc., Westlake, Ohio C. W. Preuss, 俄亥俄州西湖城Kingsford Broach and Tool , Inc公司 D. E. Sisler, Caterpillar, Inc., Aurora, Illinois D. E. Sisler, 伊利诺伊州奥罗拉Caterpillar, Inc.公司COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSCONTENTS 目录 Foreword 前言 Standards Committee Roster 标准委员会名单 1 Scope 1 范围 2 Twist Drills 2 麻花钻 2.1 Nomenclature and Definitions 2.1 术语和定义 2.2 Classifications 2.2 分类 3 Combined Drills and Countersinks3 双用钻头和锪钻 3.1 Nomenclature and Definitions 3.1 术语和定义 3.2 Applicable Twist Drill Terms 3.2 适用的麻花钻术语 Figures 图解 1 Identity of Twist Drill Features 1 麻花钻特征识别COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS2 Identity of Core Drill Features 2 空心钻特征识别 3 Identity of Combined Drill and Countersink Features 3 双用钻头和锥口钻特征识别 4 Dimensions of Fractional Size Twist Drills - High Speed Steel (Silver and Deming Style) 4 分数尺寸麻花钻的大小 - 高速钢（直柄加长类型） Tables 表格 1 General Dimensions of Straight Shank Twist Drills . Jobbers Length 1 直柄麻花钻主要尺寸 - Jobbers Length 2 General Dimensions of Straight Shank Twist Drills . Taper Length 2 直柄麻花钻主要尺寸 - Taper Length A. Through 1/2 in. (12.7 mm) Dia A. 直径至1/2 in. (12.7 mm)B. Over '/2 in . (12.7 mm) Dia B. 直径超过1/2 in. (12.7 mm)3. General Dimensions of Straight Shank Twist Drills - Screw Machine Length 3. 直柄麻花钻主要尺寸 - 螺丝车床长度A. Through 1 in. (25.4 mm) Dia A. 至1 in.（25.4 mm）尺寸B. Over 1 in. (25.4 mm) Dia B. 超过1 in.（25.4 mm）尺寸4 General Dimensions of Tangs for Straight Shank Twist DrillsCOPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS4直柄麻花钻柄脚的主要尺寸5 General Dimensions of Taper Shank Twist Drills 5 锥柄麻花钻的主要尺寸6 Specifications and Definitions for Split Point Drill Grinding 6 Split Point钻磨制的规范和定义7 General Dimensions of Three and Four Flute Straight Shank Core Drills 7 三刃和四刃直柄空心钻的主要尺寸8 General Dimensions of Three and Four Flute Taper Shank Core Drills 8 三刃和四刃锥柄空心钻的主要尺寸9 A. General Dimensions of Combined Drills and Countersinks (Plain and Bell Types) 9 A. 双用钻头和锪钻（普通和铃形）的主要尺寸B. Tolerances of Combined Drills and Countersinks B. 双用钻头和的公差10 Element Tolerances for High Speed Steel General Purpose Twist Drills 10 高速钢通用麻花钻元件公差COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTWIST DRILLS 麻花钻 (Straight Shank and Taper Shank Combined Drills and Countersinks) （直柄和锥柄双用钻头及锪钻） 1 SCOPE 1 范围 This Standard covers nomenclature, definitions, sizes and tolerances of High Speed Steel, Straight and Taper Shank Drills, and Combined Drills and Countersinks, Plain and Bell Type. It covers both inch and metric size drills. 本标准涉及普通的及钟形高速钢直柄和锥柄钻头 以及双用钻头和锪钻的术语、定义、尺寸、公差。 既包括英制也包括米制尺寸的钻头。 2 TWIST DRILLS 2 麻花钻 2.1 Nomenclature and Definitions 2.1 术语和定义 axis - the imaginary straight line which forms the longitudinal center line of the drill 轴线 - 假想的直线，形成钻头的纵向中心线 back taper - a slight decrease in diameter from point to back in the body of the drill 倒锥 - 从顶部到后部钻体直径细微地减小 body C the portion of the drill extending from the shank or neck to the outer corners of the cutting lips 钻体 - 钻头从柄或颈延伸至钻刃转角的部分COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Servicesbody diameter clearance - that portion of the land that has been cut away so it will not rub against the walls of the hole 钻体直径余隙 - 钻头韧带切掉使得不与孔壁摩擦 的部分 chisel edge - the edge at the end of the web that connects the cutting lips 横刃 - 腹板末端连接钻刃的刃口 chisel edge angle - the angle included between the chisel edge and the cutting lip as viewed from the end of the drill 横刃角 - 从钻头末端观察的横刃与切削刃之间的 夹角 clearance diameter - the diameter over the cut-away portion of the drill lands 隙径 - 钻头韧带切削部分的直径 drill diameter - the diameter over the margins of the drill measured at the point 钻直径 - 在顶部测得的钻头横刃边缘直径 flutes - helical or straight grooves cut or formed in the body of the drill to provide cutting lips, to permit removal of chips, and to allow cutting fluid to reach the cutting lips 凹槽 - 钻体上切出或形成的螺线或者直凹槽用以 形成钻刃、清除碎片并使得切削液到达钻刃。ASME B94.11M-1993TWIST DRILLSflute length - the length from the outer corners of the cutting lip to the extreme back end of the flutes. It includes the sweep of the tool used to generate the flutes and, therefore, does not indicate the useable length of the flutes. 槽长 - 从切削刃转角到凹槽最后端的长度。 包括用 于生成凹槽的工具的延伸，因此不会指出凹槽的可 用长度。 helix angle - the angle made by the leading edge of the land with a plane containing the axis of the drill 螺旋角 - 螺纹顶前缘同包含钻头轴线的平面所成 角度 land - the peripheral portion of the drill body between adjacent flutes 螺纹顶 - 钻体相邻凹槽间的周边部分 land width - the distance between the leading edge and the heel of the land measured at a right angle to the leading edge 螺纹顶宽 - 与螺纹顶成直角时测量所得的螺纹顶 前缘与后部之间的距离。 lips 刃 (a) two-flute drill - the cutting edges extending from the chisel edge to the periphery (a) 双槽钻头- 刃口从横刃向边缘延伸 (b) three- or four-flute drill (core drill) - the cutting edges extending from the bottom of the chamfer to the periphery (b) 三槽或四槽钻头（空心钻） - 刃口从倒角底部 向边缘延伸lip relief - the axial relief on the drill point 钻刃离隙 - 钻尖处的轴向中隙角 lip relief angle C the axial relief angle at the outer corner of the lip. It is measured across the margin portion of the land. 钻缘后角 - 钻刃转角的轴向后角。 跨越螺纹顶边缘 部分测量。 margin - the cylindrical portion of the land which is not cut away to provide clearance 刃带 - 螺纹顶柱形未切掉部分提供余隙 neck - the section of reduced diameter between the body and the shank of a drill 颈 - 钻头钻体与柄之间的直径减小的部分 overall length - the length from the extreme end of the shank to the outer corners of the cutting lips. It does not include the conical shank end often used on straight shank drills, nor does it include the conical cutting point used on both straight and taper shank drills. (For core drills with an external center on the cutting end, same as for two flute drills. For core drills with internal centers on the cutting end, the overall length is to the extreme ends of the tool.) 全长 - 从柄的最末端到钻刃转角的长度。 不包括直 柄钻头上经常使用的锥形柄末端，也不包括直柄钻 头和锥柄钻头上使用的锥形刀口。 （对于切削刃上 外部定心孔的空心钻与双槽钻头相同。对于切削刃 上内部定心孔的空心钻，其全长为直到工具最末端 的长度。 ） point - the cutting end of a drill, made up of the ends of the lands, the web, and the lips. In form, it resembles a cone, but departs from a true cone to furnish clearance behind the cutting lips. 钻尖 - 钻头的切削刃，由land的末端、腹板和钻刃COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS组成。形式上类似于锥体，但是与真正的锥体不同 的是在钻刃后面留有余隙。 point angle - the angle included between the lips projected upon a plane parallel to the drill axisand parallel to the cutting lips 钻尖角 - 在平行于钻头轴线及钻刃的平面上投影 出的钻缘之间的夹角Taper shank -in accordance with American National Standard B5.10, Machine Tapers 锥柄 - 符合美国国家标准《B5.10-机床楔销》英文 Taper shank Tang Axis Shank length Helix angle Flute length Overall length Drill diameter Body clearance Margin Web Chisel edge diameter中文 锥柄 柄脚 轴 柄长 螺旋角 槽长 总长度 钻直径 钻体直径余隙 横刃角 横刃边缘 臂 横刃英文 Tang drive Shank diameter Straight shank Neck Flutes Body Land width Point angle Lip relief angle Clearance diameter Lip Land中文 柄脚驱动 柄直径 直柄 颈 槽 钻身 螺纹顶宽 顶角 钻缘后角 留隙直径 钻刃 槽脊Chisel edge angleFIG. 1 IDENTITY OF TWIST DRILL FEATURES 图1 麻花钻特征识别COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSshank - the part of the drill by which it is held and driven 柄 - 用来固定并驱动的钻头部分2.2 分类 2.2.1 Base on Kind of Shank 2.2.1 基于柄的种类tang - the flattened end of a taper shank, intended to fit into a slot in the socket 柄脚 - 锥柄的展平端， 设计用于安装在钻头插口中 tang drive - two opposite parallel driving flats on the extreme end of a straight shank 柄脚驱动 - 直柄最末端上两个相对平行的驱动面 twist drill - a rotary end cutting tool having one or more cutting lips and having one or more helical or straight flutes for the passage of chips and the admission of a cutting fluid 麻花钻 - 一种旋转端切工具， 有一个或多个钻刃以 及一个或多个螺线或直槽用于排出碎片和输入切 削液 web - the central portion of the body that joins the lands. The extreme end of the web forms the chisel edge on a two-flute drill. 腹板 - 钻体的中部用于连接lands。在双槽钻头上 腹板的最末端形成横刃。 web thickness - the thickness of the web at the point unless another specific location is indicated 腹板厚度 - 钻尖处的腹板厚度， 除非另外指定位置straight shank drills - those having cylindrical shanks which may be the same or different diameter than the body of the drill. The shank may be with or without driving flats, tang, grooves or threads. 直柄钻 － 带有圆柄，其直径可能与钻身相同也可 能不同。柄上可以有驱动面、柄脚、凹槽或螺纹也 可以没有。 taper shank drills - those having conical shanks suitable for direct fitting into tapered holes in machine spindles, driving sleeves, or sockets. Tapered shanks generally have a tang, which is used with a drift bar to eject the drill from its mating socket. 锥柄钻 － 带有锥形柄，适合直接安装在机器轴、 驱动套管或插口上的锥形孔内。锥柄钻一般都会有 一个柄脚，同锚杆一起用来将钻头从配套插口中拆 下。 2.2.2 Based on Number of Flutes 2.2.2 基于凹槽的数量 two-flute drills - the conventional type of drill used for originating holes 双槽钻头 - 普通型号的钻头，用来开始钻洞之用web thinning - the operation of reducing the web thickness at the point to reduce drilling thrust 将钻心厚度磨薄 - 磨薄钻尖处腹板厚度减小钻头 轴向载荷的操作 2.2 ClassificationsCOPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Servicesthree-flute drills (core drills) - drills commonly used for enlarging and finishing drilled, cast or punched holes. They will not produce original holes. 三槽钻头（扩孔钻） - 一般用来扩大和修整钻取、ASME B94.11M-1993TWIST DRILLS铸造或冲制的孔。不用来制造最初的孔。 four-flute drills (core drills) - used interchangeably with three-flute drills. They are of similar construction except for the number of flutes. 四槽钻头（扩孔钻） - 可替代三槽钻头。除了凹槽 的数量，它们有着相似的结构。 2.2.3 Based on Hand of Cut 2.2.3 基于切削方向 right-hand cut - when viewed from the cutting point, the counterclockwise rotation of a drill in order to cut 反向切削 - 从切削端观察， 切削时钻头逆时针方向 旋转 left-hand cut - when viewed from the cutting point, the clockwise rotation of a drill in order to cut 正向切削 - 从切削端观察， 切削时钻头顺时针方向 旋转 3 COMBINED DRILLS AND COUNTERSINKS 3 双用钻头和锪钻 3.1 Nomenclature and Definitions 3.1 术语和定义 These definitions are applicable to Tables 9 and 10. 这些定义适用于表9和表10。 axis - the imaginary straight line which forms the longitudinal center line of the combined drill and countersink. 轴线 - 构成组合中心钻纵向中心线的假想直线。back taper - a slight decrease in diameter from the front to back in the drill length 倒锥 - 钻头长度上直径从前部到后部稍微减小 bell angle - the included angle of the secondary conical section providing clearance or protection for the countersink angle conical surface (it is normally 120 deg.) 铃形角 - 为锥口钻角锥面提供余隙或者保护的辅 助锥形截面的夹角（一般为120度） bell diameter - the diameter at the intersection of the countersink portion and the bell portion at the leading edge of the land 铃形直径 - 锥口钻部分和铃形部分在land前缘交 叉位置的直径 body - the central portion of the body by which it is held or driven 钻体 - 钻体的中心部分，由此进行固定和驱动 combined drill and countersink - single or double-end cutting tool, having helical or straight flutes, and having a drill portion and an adjacent integral countersink portion, primarily used to produce center holes in work that will be held between machine centers 组合中心钻 - 一头或双头的切削工具， 上有螺旋槽 或者直槽，并有钻体及相邻的整合锥口钻部分，主 要用于在机器中心所做的工作中制造中心孔 countersink angle - the included angle of the countersink portion (it is normally 60 deg.) 埋头角 （countersink angle） - 倒角部分的夹角 （一 般为60度） countersink relief angle - the angle between a plane at right angles to the axis of the tool, and a line tangent to the surface of the countersinkCOPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSportion at the intersection of the countersink portion and the body and at the leading edge of the land. For the bell type, the relief angle is measured at the intersection of the bell portion and the body. 倒角后角 - 与工具的轴线成直角的平面同和倒角 部分表面相切的线在倒角部分与钻体会合处以及 land前缘处的夹角。对于铃形，后角在铃形部分与 钻体会合出测得。 countersink portion - that part of the tool which produces a conical bearing surface for the work centers. The bell type produces an additional secondary conical section to provide clearance or protection for the bearing surface. 倒角部分 - 工具的一部分用于在工作中心生成圆 锥孔。钟形会形成额外的辅助锥形截面为承压面提 供余隙或者保护。 drill diameter - the diameter of the drill portion measured across the outer corners of the cutting lips钻直径 - 钻头部分的直径，横越钻刃进行测量 drill diameter relief - the relief provided on the land of the drill portion to reduce contact with the walls of the hole. It is generally of an eccentric form. 钻直径余隙 - 钻头部分的land提供的余隙用以减 少同洞壁的摩擦接触。通常都是偏心的形状。 drill length - the length of the drill portion from the outer corners of the cutting lips to its intersection with the countersink portion 钻头长度 - 钻头部分从钻刃转角到与倒角部分交 会处的距离。 drill portion - that part of the tool extending beyond the countersink portion to produce clearance for the point of a conical center 钻头部分 - 延伸超出倒角的工具部分形成锥形顶 尖钻尖的余隙Taper shank- in accordance with American National Standard 85.10, Machine Tapers 锥柄 - 符合《美国国家标准85.10，机用锥度》COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS英文 Tang Land width Shank diameter Straight shank Helix angle Flutes Body Land Clearance diameter中文 118度钻尖 柄脚 螺纹顶宽 柄直径 直柄 螺旋角 凹槽 钻体 槽脊 隙径英文 Drill diameter Neck Axis Shank length Lip relief angle Flute length Overall length Margin Body clearance diameter中文 锥柄 钻直径 颈 轴线 柄长度 钻缘后角 槽长 全长 刃带 钻体直径余隙FIG. 2 IDENTITY OF CORE DRILL FEATURES 图2 空心钻特征识别COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS英文 Countersink angle Drill diameter Flute length Helix angle Lip relief angle Plain Type Countersink angle Drill diameter Relief angle Lip Drill diameter relief Chisel edge angle Lip Cutting face right-hand rotation中文 倒角角度 钻直径 槽长 螺旋角 钻缘后角 普通式 倒角角度 钻直径 后角 钻刃 钻直径减缓 横刃角 钻刃 切削面反向旋转英文 Point angle Drill length Axis Countersink relief angle Overall length Bell angle Point angle Drill length Bell diameter Bell type Chisel edge Web Body diameter Bell Type中文 锥尖角 钻头长度 轴线 倒角后角 全长 铃形角 锥尖角 钻头长度 铃形直径 钻面 横刃 腹板 钻体直径 钟形FIG. 3 IDENTITY OF COMBINED DRILL AND COUNTERSINK FEATURES 图3 组合中心钻特征识别 flutes - the helical or straight grooves cut or formed in the cutting portions and the body to provide cutting edges on both the drill and countersink portions, to permit removal of chips and to allow cutting fluid to reach the cutting lips 凹槽 - 切削部分或钻体上切出或形成的螺线或者 直凹槽用以在钻头和倒角部分形成切边、清除碎片COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling Services并使得切削液到达钻刃 flute length - the length from the outer corners of the cutting lips to the extreme ends of the flutes. It includes the sweep of the tool used to generate the flutes and, therefore, does not indicate the usable length of flutes.ASME B94.11M-1993TWIST DRILLS槽长 - 从切削刃转角到凹槽最末端的长度。 包括用 于生成凹槽的工具的延伸，因此不会指出凹槽的可 用长度。 land - the peripheral drill and countersink portions between the adjacent flutes Land - 相邻槽之间的周边钻头和倒角部分螺旋角 lips 刃 lip relief 钻刃离隙overall length - the length between the extreme points of the tools 全长 - 工具的端点之间的长度 3.2 Applicable Twist Drill Terms 3.2 适用的麻花钻术语 For definitions, see para. 2.1. 定义参照第2.1段 chisel edge 横刃 chisel edge angle 横刃角 helix anglelip relief angle 钻缘后角 point angle 锥尖角 web 腹板 web thickness 腹板厚度COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS英文 Break corner For sizes under 3/32 in. a chamfer or conical point may be used at the manufacturer’s option.中文 折角 对于倒角尺寸小于3/32 英寸， 应当根据厂商的选 择使用倒角或锥顶点。英文 Chamfer sizes 3/32 in. and larger. See table tolerance 10 for中文 倒角尺寸为3/32英寸或 更大 关于公差参照表10TABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS-JOBBERS LENGTH C FRACTIONAL, NUMBER, LETTER AND METRIC SIZES 表1 直柄麻花钻的主要尺寸 - JOBBERS LENGTH - 分数、数字、字母和米制尺寸 Diameter of Drill 钻头直径 D Fraction 分数 No. 数字 Ltr. 字母 Millimeter 毫米 Decimal Inch Equivalent 等 效 的 十进 位法英寸 0.3 0.1 0.9 0. 0.1 0. 87 0.0 Millimeter Equivalent 等效的毫 米 0.150 0.160 0.170 0.180 0.19Q 0.201 0.211 0.221 0.231 0.241 0.250 0.254 Flute Length 槽长 F Inch 英寸 Mm 毫米 Overall Length 全长 L Inch 英寸 Mm 毫米97 96 95 94 93 92 91 90 89 880.15 0.16 0.17 0.18 0.19 0.201/16 1/16 1/16 1/16 1/16 1/16 5/64 5/64 5/64 5/64 5/64 5/641.6 1.6 1.6 1.6 1.6 1.6 2.0 2.0 2.0 2.0 2.0 2.03/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/419 19 19 19 19 19 19 19 19 19 19 19COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS86 85 84 0.30 83 82 0.32 81 80 0.35 79 0.38 1/64 0.40 78 0.42 0.45 77 0.280.0 0.8 0.5 0.0 0.8 0.0 0.7 0.5 0.00.267 0.280 0.292 0.300 0.305 0.318 0.320 0.330 0.343 0.350 0.368 0.380 0.396 0.400 0.406 0.420 0.450 0.4573/32 3/32 3/32 3/32 3/32 3/32 3/32 3/32 1/8 1/8 1/8 3/16 3/16 3/16 3/16 3/16 3/16 3/162.4 2.4 2.4 2.4 2.4 2.4 2.4 2.4 3 3 3 5 5 5 5 5 5 53/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 7/8 7/8 7/8 7/819 19 19 19 19 19 19 19 19 19 19 19 19 19 22 22 22 22COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS-JOBBERS LENGTH C FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT’D) 表 1 直 柄 麻 花 钻 的 主 要 尺 寸 - JOBBERS LENGTH - 分 段 的 、 数 字 、 字 母 和 米 制 尺 寸 （ 续 ） Diameter of Drill 钻头直径 D Fraction 分数 No. 数字 Ltr. 字母 Millimeter 毫米 Decimal Inch Equivalent 等效的十 进位法英 寸 0.7 0.0 0.55 74 0.60 73 72 0.65 71 0.70 70 69 0.75 68 1/32 0.80 67 66 0.85 65 0.90 64 63 0.95 62 0.5 0.0 0.6 0.6 0.2 0.0 0.5 0.0 0.0 0.0 0.4 0.0380 Millimeter Equivalent 等效的毫 米 Flute Length 槽长 F Inch 英寸 Mm 毫米 Overall Length 全长 L Inch 英寸 Mm 毫米0.48 0.50 76 750.480 0.500 0.508 0.533 0.550 0.572 0.600 0.610 0,635 0.650 0.660 0.700 0.711 0.742 0.750 0.787 0.792 0.800 0.813 0.838 0.850 0.889 0.899 0.914 0.940 0.950 0.9653/16 3/16 3/16 1/4 1/4 1/4 5/6 5/6 5/6 3/8 3/8 3/8 3/8 1/2 1/2 1/2 1/2 1/2 1/2 1/2 5/8 5/8 5/8 5/8 5/8 5/8 5/85 5 5 6 6 6 8 8 8 10 10 10 10 13 13 13 13 13 13 13 16 16 16 16 16 16 167/8 7/8 7/8 1 1 1 1 1/8 1 1/8 1 1/8 1 1/4 1 1/4 1 1/4 1 1/4 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 1/222 22 22 25 25 25 29 29 29 32 32 32 32 35 35 35 35 35 35 35 38 38 38 38 38 38 38COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS61 1.00 60 59 1.05 58 57 1.10 1.15 56 1.20 1.250.4 0.0 0.0 0.3 0.5 0.2 0.04920.991 1.000 1.016 1.041 1.050 1.067 1.092 1.100 1.150 1.181 1.191 1.200 1.25011/16 11/16 11/16 11/16 11/16 11/16 3/4 3/4 3/4 3/4 3/4 7/8 7/817 17 17 17 17 17 19 19 19 19 19 22 221 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 3/4 1 3/4 1 3/4 1 3/4 1 3/4 1 7/8 1 7/841 41 41 41 41 41 44 44 44 44 44 48 48COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS-JOBBERS LENGTH C FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT’D) 表 1 直 柄 麻 花 钻 的 主 要 尺 寸 - JOBBERS LENGTH - 分 段 的 、 数 字 、 字 母 和 米 制 尺 寸 （ 续 ） Diameter of Drill 钻头直径 D Fraction 分数 No. 数字 Ltr. 字母 Millimeter 毫米 Decimal Inch Equivalent 等效的十 进位法英 寸 0.0 1.35 54 1.40 1.45 1.50 53 1.55 1/16 1.60 52 1.65 1.70 51 1.75 50 1.80 1.85 49 1.90 48 1.95 5/64 47 2.00 2.05 0.0 0.1 0.5 0.5 0.5 0.9 0.9 0.9 0.0 0.0 0.1 0.7 0.0807 Millimeter Equivalent 等效的毫 米 Flute Length 槽长 F Inch 英寸 Mm 毫米 Overall Length 全长 L Inch 英寸 Mm 毫米1.30 551.300 1.321 1.350 1.397 1.400 1.450 1.500 1.511 1.550 1.588
1.650 1.700 1.702 1.750 1.778 1.800 1.850 1.854 1.900 1.930 1.950 1.984 1.994 2.000 2.0507/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 7/8 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1/822 22 22 22 22 22 22 22 22 22 22 22 25 25 25 25 25 25 25 25 25 25 25 25 25 25 291 7/8 1 7/8 1 7/8 1 7/8 1 7/8 1 7/8 1 7/8 1 7/8 1 7/8 1 7/8 1 7/8 1 7/8 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1/848 48 48 48 48 48 48 48 48 48 48 48 51 51 51 51 51 51 51 51 51 51 51 51 51 51 54COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS46 45 2.10 2.15 44 2.20 2.25 43 2.30 2.35 42 3/32 2.400.0 0.6 0.6 0.0 0.5 0.8 0.09452.057 2.083 2.100 2.150 2.184 2.200 2.250 2.261 2.300 2.350 2.375 2.383 2.4001 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/4 1 1/4 1 1/4 1 1/4 1 1/4 1 1/4 1 1/4 1 3/829 29 29 29 29 32 32 32 32 32 32 32 352 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 3/854 54 54 54 54 57 57 57 57 57 57 57 60COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS-JOBBERS LENGTH C FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT’D) 表 1 直 柄 麻 花 钻 的 主 要 尺 寸 - JOBBERS LENGTH - 分 段 的 、 数 字 、 字 母 和 米 制 尺 寸 （ 续 ） Diameter of Drill 钻头直径 D Fraction 分数 No. 数字 Ltr. 字母 Millimeter 毫米 Decimal Inch Equivalent 等效的十 进位法英 寸 0. 40 2.50 39 38 2.60 37 2.70 36 7/64 35 2.80 34 33 2.90 32 3.00 31 3.10 1/8 3.20 30 3.30 3.40 29 3.50 0.0 0.5 0.4 0.3 0.4 0.2 0.0 0.0 0.0 0.0 0.5 0.9 0.8 Millimeter Equivalent 等效的毫 米 Flute Length 槽长 F Inch 英寸 Mm 毫米 Overall Length 全长 L Inch 英寸 Mm 毫米412.438 2.450 2.489 2.500 2.527 2.578 2.600 2.642 2.700 2.705 2.779 2.794 2.300 2.819 2.870 2.900 2.946 3.000 3.048 3.100 3.175 3.200 3.264 3.300 3.400 3.454 3.5001 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 7/16 1 7/16 1 7/16 1 7/16 1 7/16 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 3/4 1 3/4 1 3/4 1 3/435 35 35 35 35 37 37 37 37 37 38 38 33 38 38 41 41 41 41 41 41 41 41 44 44 44 442 3/8 2 3/8 2 3/8 2 3/8 2 3/8 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 3/4 2 3/4 2 3/4 2 3/4 2 3/4 2 3/4 2 3/4 2 3/4 2 7/8 2 7/8 2 7/8 2 7/860 60 60 60 60 64 64 64 64 64 67 67 67 67 67 70 70 70 70 70 70 70 70 73 73 73 73COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS28 9/64 3.60 27 3.70 26 25 3.80 24 3.90 23 5/32 220.6 0.0 0.0 0.6 0.5 0.2 0.15703.569 3.571 3.600 3.658 3.700 3.734 3.797 3.800 3.861 3.900 3.912 3.967 3.9881 3/4 1 3/4 1 7/8 1 7/8 1 7/8 1 7/8 1 7/8 1 7/8 2 2 2 2 244 44 48 48 48 48 48 48 51 51 51 51 512 7/8 2 7/8 3 3 3 3 3 3 3 1/8 3 1/8 3 1/8 3 1/8 3 1/873 73 76 76 76 76 76 76 79 79 79 79 79COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS-JOBBERS LENGTH C FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT’D) 表 1 直 柄 麻 花 钻 的 主 要 尺 寸 - JOBBERS LENGTH - 分 段 的 、 数 字 、 字 母 和 米 制 尺 寸 （ 续 ） Diameter of Drill 钻头直径 D Fraction 分数 No. 数字 Ltr. 字母 Millimeter 毫米 Decimal Inch Equivalent 等效的十 进位法英 寸 0.0 0. 4.20 19 4.30 18 11/64 17 4.40 16 4.50 15 4.60 14 13 3/16 12 11 4.90 10 9 5.00 8 5.10 7 4.80 4.70 0.4 0.3 0.9 0.2 0.2 0.1 0.0 0.0 0.9 0.0 0.1969 ' 0.8 0.2010 Millimeter Equivalent 等效的毫 米 Flute Length 槽长 F Inch 英寸 Mm 毫米 Overall Length 全长 L Inch 英寸 Mm 毫米4.00 21 204.000 4.039 4.089 4.100 4.200 4.216 4.300 4.305 4.366 4.394 4.400 4.496 4.500 4.572 4.600 4.623 4.700 4.762 4.800 4.851 4.900 4.915 4.978 5.000 5.055 5.100 5.1052 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 1/8 2 3/16 2 3/16 2 3/16 2 3/16 2 3/16 2 3/16 2 3/16 2 5/16 2 5/16 2 5/16 2 5/16 2 7/16 2 7/16 2 7/16 2 7/16 2 7/16 2 7/16 2 7/1654 54 54 54 54 54 54 54 54 56 56 56 56 56 56 56 59 59 59 59 62 62 62 62 62 62 623 1/4 3 1/4 3 1/4 3 1/4 3 1/4 3 1/4 3 1/4 3 1/4 3 1/4 3 3/8 3 3/8 3 3/8 3 3/8 3 3/8 3 3/8 3 3/8 3 1/2 3 1/2 3 1/2 3 1/2 3 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 5/883 83 83 83 83 83 83 83 83 86 86 86 86 86 86 86 89 89 89 89 92 92 92 92 92 92 92COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS13/64 6 5.20 5 5.30 4 5.40 3 5.50 7/32 5.60 2 5.700.0 0.5 0.0 0.0 0.8 0.0 0.22445.159 5.182 5.200 5.220 5.300 5.309 5.400 5.410 5.500 5.558 5.600 5.613 5.7002 7/16 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 5/8 2 5/8 2 5/862 64 64 64 64 64 64 64 64 64 67 67 673 5/8 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 7/8 3 7/8 3 7/892 95 95 95 95 95 95 95 95 95 98 98 98COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS-JOBBERS LENGTH C FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT’D) 表1 直柄麻花钻的主要尺寸 - JOBBERS LENGTH - 分段的、数字、字母和米制尺寸（续） Diameter of Drill 钻头直径 D Fraction 分数 No. 数字 Ltr. 字母 Millimeter 毫米 Decimal Inch Equivalent 等效的十 进位法英 寸 0. 5.90 A 15/64 6.QQ B 6.10 C 6.20 D 6.30 1/4 E 6.40 6.50 F 6.60 G 6.70 17/64 H 6.80 6.90 I 7.00 J 0.3 0.4 0.0 0.0 0.0 0.0 0.9 0.8 0,8 0.0 0.7 0.6 0.2770 Millimeter Equivalent 等效的毫 米 Flute Length 槽长 F Inch 英寸 Mm 毫米 Overall Length 全长 L Inch 英寸 Mm 毫米15.791 5.800 5.900 5.944 5.953 6.000 6.045 6.100 6.147 6.200 6.248 6.300 6.350 6.400 6.500 6.528 6.600 6.629 6.700 6.746 8.758 6.800 6.900 6.909 7.000 7.0362 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 3/4 2 3/4 2 3/4 2 3/4 2 3/4 2 3/4 2 3/4 2 3/4 2 7/8 2 7/8 2 7/8 2 7/8 2 7/8 2 7/8 2 7/8 2 7/8 2 7/8 2 7/8 2 7/8 2 7/8 2 7/867 67 67 67 67 70 70 70 70 70 70 70 70 73 73 73 73 73 73 73 73 73 73 73 73 733 7/8 3 7/8 3 7/8 3 7/8 3 7/8 4 4 4 4 4 4 4 4 4 1/8 4 1/8 4 1/8 4 1/8 4 1/8 4 1/8 4 1/8 4 1/8 4 1/8 4 1/8 4 1/8 4 1/8 4 1/898 98 98 98 98 102 102 102 102 102 102 102 102 105 105 105 105 105 105 105 105 105 105 105 105 105COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS7.10 K 9/32 7.20 7.30 L 7.40 m 7.50 19/64 7.60 N 7.70 7.800.0 0.5 0.0 0.0 0.9 0.0 0.17.100 7.137 7.142 7.200 7.300 7.366 7.400 7.493 7.500 7.541 7.600 7.871 7.700 7.8002 15/16 2 15/16 2 15/16 2 15/16 2 15/16 2 15/16 3 1/16 3 1/16 3 1/16 3 1/16 3 1/16 3 1/16 3 3/16 3 3/1675 75 75 75 75 75 78 78 78 78 78 78 81 814 1/4 4 1/4 4 1/4 4 1/4 4 1/4 4 1/4 4 3/8 4 3/8 4 3/8 4 3/8 4 3/8 4 3/8 4 1/2 4 1/2108 108 108 108 108 108 111 111 111 111 111 111 114 114COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS-JOBBERS LENGTH C FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT’D) 表 1 直 柄 麻 花 钻 的 主 要 尺 寸 - JOBBERS LENGTH - 分 段 的 、 数 字 、 字 母 和 米 制 尺 寸 （ 续 ） Diameter of Drill 钻头直径 D Fraction 分数 No. 数字 Ltr. 字母 Millimeter 毫米 Decimal Inch Equivalent 等效的十 进位法英 寸 0.5 8.00 O 8.10 8.20 P 8.30 21/64 8.40 Q 8.50 8.60 R 8.70 11/32 8.80 S 8.90 9.00 T 9.10 23/64 9.20 9.30 U 9.40 0.0 0.8 0.8 0.7 0.6 0.0 0.8 0.0 0.3 0.3 0.2 0.0 0.3701 Millimeter Equivalent 等效的毫 米 Flute Length 槽长 F Inch 英寸 Mm 毫米 Inch 英寸 Overall Length 全长 L Mm 毫米7.90 5/167.900 7.938 8.000 8.026 8.100 8.200 8.204 8.300 8.334 8.400 8.433 8.500 8.600 8.611 8.700 8.733 8.800 8.839 8.900 9.000 9.093 9.100
9.300 9.347 9.4003 3/16 3 3/16 3 3/16 3 3/16 3 3/16 3 5/16 3 5/16 3 5/16 3 5/16 3 7/16 3 7/16 3 7/16 3 7/16 3 7/16 3 7/16 3 7/16 3 1/2 3 1/2 3 1/2 3 1/2 3 1/2 3 1/2 3 1/2 3 5/8 3 5/8 3 5/8 3 5/881 81 81 81 84 84 84 84 84 87 87 87 87 87 87 87 89 89 89 89 89 89 89 92 92 92 924 1/2 4 1/2 4 1/2 4 1/2 4 5/8 4 5/8 4 5/8 4 5/8 4 5/8 4 3/4 4 3/4 4 3/4 4 3/4 4 3/4 4 3/4 4 3/4 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 5 5 5 5114 114 114 114 117 117 117 117 117 121 121 121 121 121 121 121 124 124 124 124 124 124 124 127 127 127 127COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS9.50 3/8 V 9.60 9.70 9.80 W 9.90 25/64 10.00 X 10.20 Y0.0 0.0 0.8 0.8 0.7 0.6 0.40409.500 9.525 9.576 9.600 9.700 9.800 9.804 9.900 9.921 10.000 10.084 10.200 10.2623 5/8 3 5/8 3 5/8 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 7/8 3 7/892 92 92 95 95 95 95 95 95 95 95 98 985 5 5 5 1/8 5 1/8 5 1/8 5 1/8 5 1/8 5 1/8 5 1/8 5 1/8 5 1/4 5 1/4127 127 127 130 130 130 130 130 130 130 130 133 133COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS-JOBBERS LENGTH C FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT’D) 表 1 直 柄 麻 花 钻 的 主 要 尺 寸 - JOBBERS LENGTH - 分 段 的 、 数 字 、 字 母 和 米 制 尺 寸 （ 续 ） Diameter of Drill 钻头直径 D Fraction 分数 No. 数字 Ltr. 字母 Millimeter 毫米 Decimal Inch Equivalent 等效的十 进位法英 寸 0.4062 Z 10.50 27/64 10.80 11.00 7/16 11.20 11.50 29/64 11.80 15/32 12.00 12.20 31/64 12.50 1/2 12.90 13.00 23/64 13.20 17/32 13.50 13.80 35/64 14.00 0. 4 13/16 122 6 5/8 168 0.4 0.2 0.5 0.8 0.6 0.4 0.4 0,0 0.8 0.7 0.5 0.9 Millimeter Equivalent 等效的毫 米 Flute Length 槽长 F Inch 英寸 mm 毫米 Overall Length 全长 L Inch 英寸 mm 毫米13/3310.317 10.490 10.500 10.716 10.800 11.000 11.112 11.200 11.500 11.509 11,800 11.908 12.000 12.200 12.304 12.500 12.700 12.800 13.000 13.096 13.200 13.494 13.500 13.800 13.8913 7/8 3 7/8 3 7/8 3 15/16 4 1/16 4 1/16 4 1/16 4 3/16 4 3/16 4 3/16 4 5/16 4 5/16 4 3/8 4 3/8 4 3/8 4 1/2 4 1/2 4 1/2 4 1/2 4 13/16 4 13/16 4 13/16 4 13/16 4 13/16 4 13/1698 98 98 100 103 103 103 106 106 106 110 110 111 111 111 114 114 114 114 122 122 122 122 122 1225 1/4 5 1/4 5 1/4 5 3/8 5 1/2 5 1/2 5 1/2 5 5/8 5 5/8 5 5/8 5 3/4 5 3/4 5 7/8 5 7/8 5 7/8 6 6 6 6 6 5/8 6 5/8 6 5/8 6 5/8 6 5/8 6 5/8133 133 133 137 140 140 140 143 143 143 146 146 149 149 149 152 152 152 152 168 168 168 168 168 1&8COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS14.25 9/16 14.50 37/64 14.75 15.00 19/32 15.25 39/64 15.50 15.75 5/8 16.00 16.250.5 0.1 0.6 0.4 0.2 0.0 0.814.250 14.288 14.500 14.684 14.750 15.000 15.083 15.250 15.479 15.500 15.750 15.875 16.000 16.2504 13/16 4 13/16 4 13/16 4 13/16 5 13/16 5 13/16 5 13/16 5 13/16 5 13/16 5 13/16 5 13/16 5 13/16 5 13/16 5 13/16122 122 122 122 132 132 132 132 132 132 132 132 132 1326 5/8 6 5/8 6 5/8 6 5/8 7 1/8 7 1/8 7 1/8 7 1/8 7 1/8 7 1/8 7 1/8 7 1/8 7 1/8 7 1/8168 168 168 168 181 181 181 181 181 181 181 181 181 181COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTABLE 1 GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS-JOBBERS LENGTH C FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT’D) 表 1 直 柄 麻 花 钻 的 主 要 尺 寸 - JOBBERS LENGTH - 分 段 的 、 数 字 、 字 母 和 米 制 尺 寸 （ 续 ） Diameter of Drill 钻头直径 D Fraction 分数 No. 数字 Ltr. 字母 Millimeter 毫米 Decimal Inch Equivalent 等效的十 进位法英 寸 0. 21/32 16.75 17.00 43/64 17.25 11/16 17.50 0.2 0.3 0.1 0.0 Millimeter Equivalent 等效的毫 米 Flute Length 槽长 F Inch 英寸 Mm 毫米 Overall Length 全长 L Inch 英寸 Mm 毫米41/6416.271 16.500 16.667 16.750 17.000 17.066 17.250 17.462 17.5005 3/l6 5 3/l6 5 3/l6 5 5/8 5 5/8 5 5/8 5 5/8 5 5/8 5 5/8132 132 132 143 143 143 143 143 1437 1/8 7 1/8 7 5/8 7 5/8 7 5/8 7 5/8 7 5/8 7 5/8 7 5/8181 181 181 194 194 194 194 194 194COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS英文 Chamfer sizes 3/32 in. and larger. For sizes under 3/32 in. a chamfer or conical point may be used at the manufacturer’s option See Table 10 for tolerance中文 倒角尺寸为3/32英寸或更大 对于倒角尺寸小于3/32英寸，应当根据厂商的选择 使用倒角或锥顶点。 关于公差参照表10TABLE 2A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS C TAPER LENGTH C THROUGH 1/2 in. (12.7 mm) DIA. FRACTIONAL, NUMBER, AND METRIC SIZES 表2A - 直柄麻花钻主要尺寸 - 锥长度-直径至1/2英寸（12.7mm） ，分数、数字和米制尺寸 Diameter of Drill 钻头直径 D Fraction 分数 No. 数字 mm 毫米 Decimal Inch Equivalent 等效的十 进位法英 寸 0.0 0. 58 57 1.10 1.15 56 3/64 1.20 1.25 1,30 55 1.35 0.0 0.3 0.Q453 0.9 0.2 0.0 0.0531 Millimeter Equivalent 等效的毫 米 Flute Length 槽长 F Inch 英寸 mm 毫米 Inch 英寸 Overall Length 全长 L mm 毫米1.00 60 591.000 1.016 1.041 1.050 1.087 1.092 1.100 1.150 1.181 1.191 1.200 1.250 1.300 1.321 1.3501 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 1/8 1 3/4 1 3/4 1 3/4 1 3/4 1 3/429 29 29 29 29 29 29 29 29 29 44 44 44 44 442 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 3 3 3 3 357 57 57 57 57 57 57 57 57 57 76 76 76 76 76COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS54 1.40 1.45 1.50 53 1.55 1/16 1.60 52 1.65 1.70 51 1.75 50 1.800.1 0.1 0.0 0.0 0.0 0.0 0.0 0.07091.397 1.400 1.450 1.500 1.511 1.550 1.588 1.600 1.613 1.650 1.700 1.702 1.750 1.778 1.8001 3/4 1 3/4 1 3/4 1 3/4 1 3/4 1 3/4 1 3/4 2 2 2 2 2 2 2 244 44 44 44 44 44 44 51 51 51 51 51 51 51 513 3 3 3 3 3 3 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 3/476 76 76 76 76 76 76 95 95 95 95 95 95 95 95COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTABLE 2A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS C TAPER LENGTH C THROUGH 1/2 in. (12.7 mm) DIA. FRACTIONAL, NUMBER, AND METRIC SIZES (CONT’D) 表2A - 直柄麻花钻主要尺寸 - 锥长度-直径至1/2英寸（12.7mm） ，分数、数字和米制尺寸（续） Diameter of Drill 钻头直径 D Fraction 分数 No. 数字 mm 毫米 Decimal Inch Equivalent 等效的十 进位法英 寸 0.0 1.90 48 1.95 5/64 47 2.00 2.05 46 45 2.10 2.15 44 2.20 2.25 43 2.30 2.35 42 3/32 2.40 41 2.45 40 2.50 39 38 0.0 0.1 0.7 0.0 0.7 0.0 0.6 0.6 0.5 0.5 0.5 0.4 0.5 Millimeter Equivalent 等效的毫 米 Flute Length 槽长 F Inch 英寸 mm 毫米 Inch 英寸 Overall Length 全长 L mm 毫米1.85 491.850 1.854 1.900 1.930 1.950 1.984 1.994 2.000 2.050 2.057 2.083 2.100 2.150 2.184 2.200 2.250 2.261 2.300 2.350 2.375 2.383 2.400 2.438 2.450 2.489 2.500 2.527 2.5782 2 2 2 2 2 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/4 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 1/251 51 51 51 51 51 57 57 57 57 57 57 57 57 57 57 57 57 57 57 57 64 64 64 64 64 64 643 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 4 1/4 4 1/4 4 1/4 4 1/4 4 1/4 4 1/4 4 1/4 4 1/4 4 1/4 4 1/4 4 1/4 4 1/4 4 1/4 4 1/4 4 1/4 4 5/8 4 5/8 4 5/8 4 5/8 4 5/8 4 5/8 4 5/895 95 95 95 95 95 108 108 108 108 108 108 108 108 108 108 108 108 108 108 108 117 117 117 117 117 117 117COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS2.60 37 2.70 36 7/64 35 2.80 34 33 2.90 32 3.000.0 0.5 0.0 0.0 0.2 0.12.600 2.642 2.700 2.705 2.779 2.794 2.800 2.819 2.870 2.900 2.946 3.0002 1/2 2 1/2 2 1/2 2 1/2 2 1/2 2 3/4 2 3/4 2 3/4 2 3/4 2 3/4 2 3/4 2 3/464 64 64 64 64 70 70 70 70 70 70 704 5/8 4 5/8 4 5/8 4 5/8 4 5/8 5 1/8 5 1/8 5 1/8 5 1/8 5 1/8 5 1/8 5 1/8117 117 117 117 117 130 130 130 130 130 130 130COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTABLE 2A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS C TAPER LENGTH C THROUGH 1/2 in. (12.7 mm) DIA. FRACTIONAL, NUMBER, AND METRIC SIZES (CONT’D) 表2A - 直柄麻花钻主要尺寸 - 锥长度-直径至1/2英寸（12.7mm） ，分数、数字和米制尺寸（续） Diameter of Drill 钻头直径 D Fraction 分数 No. 数字 mm 毫米 Decimal Inch Equivalent 等效的十 进位法英 寸 0. 1/8 3.20 30 3.30 3.40 29 3.50 28 9/64 3.60 27 3.70 26 25 3.80 24 3.90 23 5/32 22 4.00 21 20 4.10 4.20 19 0.0 0.5 0.9 0.8 0.6 0.0 0.0 0.6 0.5 0.2 0.5 0.0 0.4 0.1660 Millimeter Equivalent 等效的毫 米 Flute Length 槽长 F Inch 英寸 mm 毫米 Inch 英寸 Overall Length 全长 L mm 毫米313.048 3.100 3.175 3.200 3.264 3.300 3.400 3.454 3.500 3.569 3.571 3.600 3.658 3.700 3.734 3.797 3.800 3.861 3.900 3.912 3.967 3.988 4.000 4.039 4.089 4.100 4.200 4.2162 3/4 2 3/4 2 3/4 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3/8 3 3/8 3 3/8 3 3/8 3 3/8 3 3/8 3 3/870 70 70 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 76 86 86 36 86 86 86 865 1/8 5 1/8 5 1/8 5 3/8 5 3/8 5 3/8 5 3/8 5 3/8 5 3/8 5 3/8 5 3/8 5 3/8 5 3/8 5 3/8 5 3/8 5 3/8 5 3/8 5 3/8 5 3/8 5 3/8 5 3/8 5 3/4 5 3/4 5 3/4 5 3/4 5 3/4 5 3/4 5 3/4130 130 130 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 137 146 146 146 146 146 146 146COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS4.30 18 11/64 17 4.40 16 4.50 15 4.60 14 13 3/16 4.700.5 0.0 0.0 0.0 0.0 0.54.300 4.305 4.366 4.394 4.400 4.496 4.500 4.572 4.600 4.623 4.700 4.7623 3/8 3 3/8 3 3/8 3 3/8 3 3/8 3 3/8 3 3/8 3 3/8 3 3/8 3 3/8 3 3/8 3 3/886 86 86 86 86 86 86 86 86 86 86 365 3/4 5 3/4 5 3/4 5 3/4 5 3/4 5 3/4 5 3/4 5 3/4 5 3/4 5 3/4 5 3/4 5 3/4146 146 146 146 146 146 146 146 146 146 146 146COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTABLE 2A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS C TAPER LENGTH C THROUGH 1/2 in. (12.7 mm) DIA. FRACTIONAL, NUMBER, AND METRIC SIZES (CONT’D) 表2A - 直柄麻花钻主要尺寸 - 锥长度-直径至1/2英寸（12.7mm） ，分数、数字和米制尺寸（续） Diameter of Drill 钻头直径 D Fraction 分数 No. 数字 mm 毫米 Decimal Inch Equivalent 等效的十 进位法英 寸 0.0 4.90 10 9 5.00 8 5.10 7 13/64 6 5.20 5 5.30 4 5.40 3 5.50 7/32 5.60 2 5.70 1 5.80 5.90 15/64 6.00 6.10 0.5 0.9 0.8 0.1 0.7 0.7 0.6 0.5 0.5 0.4 0.3 0.4 0.2 Millimeter Equivalent 等效的毫 米 Flute Length 槽长 F Inch 英寸 mm 毫米 Inch 英寸 Overall Length 全长 L mm 毫米12 114.804.800 4.851 4.900 4.915 4.978 5.000 5.055 5.100 5.105 5.159 5.182 5.200 5.220 5.300 5.309 5.400 5.410 5.500 5.558 5.600 5.613 5.700 5.791 5.800 5.900 5.954 6.000 6.1003 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 5/8 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 3/4 3 3/492 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 92 95 95 95 95 95 95 95 95 956 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 1/8 6 1/8 6 1/8 6 1/8 6 1/8 6 1/8 6 1/8 6 1/8 6 1/8152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 152 156 156 156 156 156 156 156 156 156COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS6.20 6.30 1/4 6.40 6.50 17/64 6.S0 7.00 3/32 7.20 7.50 19/640.0 0.0 0.6 0.6 0.5 0.96.200 6.300 6.350 6.400 6.500 6.746 6.800 7.000 7.142 7.200 7.500 7.5413 3/4 3 3/4 3 3/4 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 4 4 495 95 95 98 98 98 98 98 98 102 102 1026 1/8 6 1/8 6 1/8 6 1/4 6 1/4 6 1/4 6 1/4 6 1/4 6 1/4 6 3/8 6 3/8 6 3/8156 156 156 159 159 159 159 159 159 162 162 162COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTABLE 2A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS C TAPER LENGTH C THROUGH 1/2 in. (12.7 mm) DIA. FRACTIONAL, NUMBER, AND METRIC SIZES (CONT’D) 表2A - 直柄麻花钻主要尺寸 - 锥长度-直径至1/2英寸（12.7mm） ，分数、数字和米制尺寸（续） Diameter of Drill 钻头直径 D Fraction 分数 No. 数字 Mm 毫米 Decimal Inch Equivalent 等效的十 进位法英 寸 0.5 8.00 8.20 21/64 8.50 11/32 8.80 9.00 23/64 9.20 9.50 3/8 9.80 25/64 10.00 10.20 13/32 10.50 27/64 10.80 11.00 7/16 11.20 11.50 29/64 11.80 15/32 0.8 0.6 0.5 0.4 0.0 0.8 0.7 0.2 0.9 0.1 0.9 0.1 0.8 Millimeter Equivalent 等效的毫 米 Flute Length 槽长 F Inch 英寸 Mm 毫米 Inch 英寸 Overall Length 全长 L Mm 毫米7.80 5/167.800 7.938 8.000 8.200 8.334 8.500 8.733 8.800 9.000 9.129 9.200 9.500 9.525 9.800 9.921 10.000 10.200 10.317 10.500 10.716 10.800 11.000 11.112 11.200 11.500 11.509 11.800 11.9084 4 4 1/8 4 1/8 4 1/8 4 1/8 4 1/8 4 1/4 4 1/4 4 1/4 4 1/4 4 1/4 4 1/4 4 3/8 4 3/8 4 3/8 4 3/8 4 3/8 4 5/8 4 5/8 4 5/8 4 5/8 4 5/8 4 3/4 4 3/4 4 3/4 4 3/4 4 3/4102 102 105 105 105 105 105 108 108 108 108 108 108 111 111 111 111 111 117 117 117 117 117 121 121 121 121 1216 3/8 6 3/8 6 1/2 6 1/2 6 1/2 6 1/2 6 1/2 6 3/4 6 3/4 6 3/4 6 3/4 6 3/4 6 3/4 7 7 7 7 7 7 1/4 7 1/4 7 1/4 7 1/4 7 1/4 7 1/2 7 1/2 7 1/2 7 1/2 7 1/2162 162 165 165 165 165 165 171 171 171 171 171 171 178 178 178 178 178 184 184 184 184 184 190 190 190 190 190COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS12.00 12.20 31/64 12.50 1/20.3 0.1 0.500012.000 12.200 12.304 12.500 12.7004 3/4 4 3/4 4 3/4 4 3/4 4 3/4121 121 121 121 1217 3/4 7 3/4 7 3/4 7 3/4 7 3/4197 197 197 197 197COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS英文 Chamfer Nominal shank size is same as nominal drill size See Table 10 for drill tolerances中文 倒角 额定柄尺寸与额定钻头尺寸相同 对于钻头的公差参见表10TABLE 2B GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS C TAPER LENGTH C OVER 1/2 in. (12.7 mm) DIA. FRACTIONAL AND METRIC SIZES 表2B - 直柄麻花钻主要尺寸 - 锥长度-直径超过1/2英寸（12.7mm） ，分数和米制尺寸 Diameter of Drill 钻头直径 Flute Length 槽长 Overall Length 全长 L mm 毫 米 Inch 英寸 mm 毫 米 Length Body 钻身长度 B Inch 英寸 mm 毫 米 of Minimum Length of Shank 柄最小长度 S Inch 英寸 mm 毫 米 Maximum Length of Neck 颈最大长度 N Inch 英 寸 mm 毫米D Frac. 分数 mm 毫米Decimal Inch Equiv. 等效的 十进位 法英寸 0.8 0.7 0.5312Millimeter Equiv. 等效的毫 米F Inch 英寸12.80 13.00 33/64 13.20 17/32 13.50 13.80 35/64 14.00 14.25 9/16 14.5012.800 13.000 13.096 13.200 13.492 13.500 13.800 13.891 14.000 14.250 14.288 14.5004 3/4 4 3/4 4 3/4 4 3/4 4 3/4 4 3/4 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8121 121 121 121 121 121 124 124 124 124 124 1248 8 8 8 8 8 8 1/4 8 1/4 8 1/4 8 1/4 8 1/4 8 3/4203 203 203 203 203 203 210 210 210 210 210 2224 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 5 5 5 5 5 5124 124 124 124 124 124 127 127 127 127 127 1272 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 5/8 2 3/4 2 3/4 2 3/4 2 3/4 2 3/4 3 1/866 66 66 66 66 66 70 70 70 70 70 791/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 5/813 13 13 13 13 13 13 13 13 13 13 160.3 0.2 0.5 0.5709COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS37/64 14.75 15.00 19/32 15.25 39/64 15.50 15.75 5/8 16.00 16,25 41/64 16.500.7 0.8 0.4 0.1 0.9 0.6 0.649614.684 14.750 15.000 15.083 15.250 15.479 15.500 15.750 15.875 16.000 16.250 16.271 16.5004 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 5 1/8 5 1/8 5 1/8 5 1/8124 124 124 124 124 124 124 124 124 130 130 130 1308 3/4 8 3/4 8 3/4 8 3/4 8 3/4 8 3/4 8 3/4 8 3/4 8 3/4 9 9 9 9222 222 222 222 222 222 222 222 222 229 229 229 2295 5 5 5 5 5 5 5 5 5 1/4 5 1/4 5 1/4 5 1/4127 127 127 127 127 127 127 127 127 133 133 133 1333 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/879 79 79 79 79 79 79 79 79 79 79 79 795/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/816 16 16 16 16 16 16 16 16 16 16 16 16COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTABLE 2B GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS C TAPER LENGTH C OVER 1/2 in. (12.7 mm) DIA. FRACTIONAL AND METRIC SIZES (CONT’D) 表2B - 直柄麻花钻主要尺寸 - 锥长度-直径超过1/2英寸（12.7mm） ，分数和米制尺寸（续） Diameter of Drill 钻头直径 Flute Length 槽长 Overall Length 全长 L Mm 毫 米 Inch 英寸 Mm 毫 米 Length Body 钻身长度 B Inch 英寸 Mm 毫 米 of Minimum Length of Shank 柄最小长度 S Inch 英寸 Mm 毫 米 Maximum Length of Neck 颈最大长度 N Inch 英 寸 Mm 毫米D Frac. 分数 Mm 毫米Decimal Inch Equiv. 等效的 十进位 法英寸 0.4 0.9 0.5Millimeter Equiv. 等效的毫 米F Inch 英寸21/32 16.75 17.00 43/64 17.25 11/16 17.50 45/64 18.00 23/32 18.50 47/64 19.00 3/4 49/64 19.50 25/32 20.00 51/64 20.50 13/16 21.00 53/64 27/32 21.50 55/6416.667 16.750 17.000 17.066 17.250 17.462 17.500 17.859 18.000 18.258 18.500 18.654 19.000 19.050 19.446 19.500 19.842 20.000 20.241 20.500 20.638 21.000 21.034 21.433 21.500 21.8295 1/8 5 3/8 5 3/8 5 3/8 5 3/8 5 3/8 5 5/8 5 5/8 5 5/8 5 5/8 5 7/8 5 7/8 5 7/8 5 7/8 6 6 6 6 1/8 6 1/8 6 1/8 6 1/8 6 1/8 6 1/8 6 1/8 6 1/8 6 1/8130 137 137 137 137 137 143 143 143 143 149 149 149 149 152 152 152 156 156 156 156 156 156 156 156 1569 9 1/4 9 1/4 9 1/4 9 1/4 9 1/4 9 1/2 9 1/2 9 1/2 9 1/2 9 3/4 9 3/4 9 3/4 9 3/4 9 7/8 9 7/8 9 7/8 10 10 10 10 10 10 10 10 10229 235 235 235 235 235 241 241 241 241 248 248 248 248 251 251 251 254 254 254 254 254 254 254 254 2545 1/4 5 1/2 5 1/2 5 1/2 5 1/2 5 1/2 5 3/4 5 3/4 5 3/4 5 3/4 6 6 6 6 6 1/8 6 1/8 6 1/8 6 1/4 6 1/4 6 1/4 6 1/4 6 1/4 6 1/4 6 1/4 6 1/4 6 1/4133 140 140 140 140 140 146 146 146 146 152 152 152 152 166 156 156 159 159 159 159 159 159 159 159 1593 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/879 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 79 795/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/816 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 18 16 16 160.1 0.8 0.4 0.0 0.7 0.4 0.1 0.8125 Q.1 0.5 0.8594COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS22.00 7/8 22.60 57/64 23.00 29/32 59/64 23.50 15/16 24.00 61/64 24.50 31/32 25.000.0 0.6 0.2 0.2 0.9 0.6 0.322.000 22.225 22.500 22.621 23.000 23.017 23.416 23.500 23.812 24.000 24.209
25.0006 1/8 6 1/8 6 1/8 6 1/8 6 1/8 6 1/8 6 1/8 6 1/8 6 1/8 6 3/8 6 3/8 6 3/8 6 3/8 6 3/8156 156 156 156 156 156 156 156 156 162 162 162 162 16210 10 10 10 10 10 10 3/4 10 3/4 10 3/4 11 11 11 11 11254 254 254 254 254 254 273 273 273 279 279 279 279 2796 1/4 6 1/4 6 1/4 6 1/4 6 1/4 6 1/4 6 1/4 6 1/4 6 1/4 6 1/2 6 1/2 6 1/2 6 1/2 6 1/2159 159 159 159 159 159 159 159 159 165 165 165 165 1653 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 1/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/879 79 79 79 79 79 98 98 98 98 98 98 98 985/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/816 16 16 16 16 16 16 16 16 16 16 16 16 16COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTABLE 2B GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS C TAPER LENGTH C OVER 1/2 in. (12.7 mm) DIA. FRACTIONAL AND METRIC SIZES (CONT’D) 表2B - 直柄麻花钻主要尺寸 - 锥长度-直径超过1/2英寸（12.7mm） ，分数和米制尺寸（续） Diameter of Drill 钻头直径 Flute Length 槽长 Overall Length 全长 Length Body 钻身长度 B Mm 毫 米 Inch 英寸 Mm 毫 米 of Minimum Length of Shank 柄最小长度 S Inch 英寸 Mm 毫米 Maximum Length of Neck 颈最大长度 N Inch 英寸 Mm 毫米D Frac. 分数 Mm 毫米Decimal Inch Equiv. 等效的 十进位 法英寸 0.0Millimeter Equiv. 等效的毫 米F Inch 英寸 Mm 毫米L Inch 英寸63/64 1 25.50 1 1/64 26.00 1 1/32 26.50 1 3/64 1 1/16 27.00 1 5/64 27.50 1 3/32 28.00 1 7/64 28.50 1 1/8 1 9/64 29.00 1 5/32 29.50 1 11/64 30.00 13/l6 30.50 1 13/6425.004 25.400 25.500 25.796 26.000 26.192 26.560 26.591 26.988 27.000 27.384 27.500 27.783 28.000 28.179 28.500 28.575 28.971 29.000 29.367 29.500 29.766 30.000 30.162 30.500 30.5596 3/8 6 3/8 6 1/2 6 1/2 6 1/2 6 1/2 6 5/8 6 5/8 6 5/8 6 5/8 6 7/8 6 7/8 6 7/8 7 1/8 7 1/8 7 1/8 7 1/8 7 1/4 7 1/4 7 1/4 7 3/8 7 3/8 7 3/8 7 3/8 7 1/2 7 1/2162 162 165 165 165 165 168 168 168 168 175 175 175 181 181 181 181 184 184 184 187 187 187 187 190 19011 11 11 1/8 11 1/8 11 1/8 11 1/8 11 1/4 11 1/4 11 1/4 11 1/4 11 1/2 11 1/2 11 1/2 11 3/4 11 3/4 11 3/4 11 3/4 11 7/8 11 7/8 11 7/8 12 12 12 12 12 1/8 12 1/8279 279 283 283 283 283 286 286 286 286 292 292 292 298 298 298 298 302 302 302 305 305 305 305 308 3086 1/2 6 1/2 6 5/8 6 5/8 6 5/8 6 5/8 6 3/4 6 3/4 6 3/4 6 3/4 7 7 7 7 1/4 7 1/4 7 1/4 7 1/4 7 3/8 7 3/8 7 3/8 7 1/2 7 1/2 7 1/2 7 1/2 7 5/8 7 5/8165 165 168 168 168 168 172 172 172 172 178 178 178 184 184 184 184 187 187 187 191 191 191 191 194 1943 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/8 3 7/898 98 98 98 98 98 98 98 98 98 98 38 98 98 98 98 98 98 98 98 98 98 98 98 98 985/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/816 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 161.6 1.2 1.9 1.0 1.7 1.4 1.0 1.6 1.2 1.9 1.5 1.1COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS1 7/32 31,00 1 15/64 31.50 1 1/4 32.00 32.50 1 9/32 33.00 1 5/16 33,50 34.00 111/32 34.501.5 1.2 1.8 1.2 1.5 1.6 1.330.958 31.000 31.354 31.500 31.750 32.000 32.500 32.542 33.000 33.338 33.500 34.000 34.133 34.5007 1/2 7 7/8 7 7/8 7 7/8 7 7/8 8 1/2 8 1/2 8 1/2 8 5/8 8 5/8 8 3/4 8 3/4 8 3/4 8 7/8190 200 200 200 200 216 216 216 219 219 222 222 222 22512 1/8 12 1/2 12 1/2 12 1/2 12 1/2 14 1/8 14 1/8 14 1/8 14 1/4 14 1/4 14 3/8 14 3/8 14 3/8 14 1/2308 318 318 318 318 359 359 359 362 362 365 365 365 3687 5/8 8 8 8 8 8 5/8 8 5/8 8 5/8 8 3/4 8 3/4 8 7/8 8 7/8 8 7/8 9194 203 203 203 203 219 219 219 222 222 225 225 225 2293 7/8 3 7/8 3 7/8 3 7/8 3 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/898 98 98 98 98 124 124 124 124 124 124 124 124 1245/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/816 16 18 16 16 16 16 16 16 16 16 16 16 16COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTABLE 2B GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS C TAPER LENGTH C OVER 1/2 in. (12.7 mm) DIA. FRACTIONAL AND METRIC SIZES (CONT’D) 表2B - 直柄麻花钻主要尺寸 - 锥长度-直径超过1/2英寸（12.7mm） ，分数和米制尺寸（续） Diameter of Drill 钻头直径 Flute Length 槽长 Overall Length 全长 L Mm 毫 米 Inch 英寸 Mm 毫 米 Length of Body 钻身长度 B Inch 英寸 Mm 毫 米 Minimum Length of Shank 柄最小长度 S Inch 英寸 Mm 毫 米 Maximum Length of Neck 颈最大长度 N Inch 英 寸 Mm 毫米D Frac. 分数 Mm 毫米Decimal Inch Equiv. 等效的 十进位 法英寸 1.0 1.2 1.0 1.7 1.4 1.0 1.0 1.7500Millimeter Equiv. 等效的毫 米F Inch 英寸1 3/8 35.00 35.50 1 13/32 36.00 36.50 1 7/16 37.00 1 15/32 37.50 38.00 1 1/2 1 9/16 1 5/8 1 3/434.925 35.000 35.500 35.717 36.000 36.500 36.512 37.000 37.308 37.500 38.000 38.100 39.688 41.275 44.4508 7/8 9 9 9 9 1/8 9 1/8 9 1/8 9 1/4 9 1/4 9 3/8 9 3/8 9 3/8 9 5/8 9 7/8 10 1/2225 229 229 229 232 232 232 235 235 238 238 238 244 251 26714 1/2 14 5/8 14 5/8 14 5/8 14 3/4 14 3/4 14 3/4 14 7/8 14 7/8 15 15 15 15 1/4 15 5/8 16 1/4368 371 371 371 375 375 375 378 378 381 381 381 387 397 4139 9 1/8 9 1/8 9 1/8 9 1/4 9 1/4 9 1/4 9 3/8 9 3/8 9 1/2 9 1/2 9 1/2 9 3/4 10 10 5/8229 232 232 232 235 235 235 238 238 241 241 241 247 254 2704 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8 4 7/8124 124 124 124 124 124 124 124 124 124 124 124 124 124 1245/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 3/4 3/416 16 16 16 16 16 16 16 16 16 16 16 16 19 19COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS英文 Chamfer sizes 3/32 in. and larger. For sizes under 3/32 in. a chamfer or conical point may be used at the manufacturer’s option. See Table 10 for tolerances中文 倒角尺寸为3/32英寸或更大 对于倒角尺寸小于3/32英寸，应当根据厂商的选择 使用倒角或锥顶点。 对于公差参见表10TABLE 3A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS C SCREW MACHINE LENGTH C THROUGH 1 in. (25.4 mm) DIA. FRACTIONAL, NUMBER, LETTER AND METRIC SIZES 表3A - 直柄麻花钻主要尺寸 - 螺丝车床长度-直径至1英寸（25.4mm） ，分数、数字、字母和米制尺寸 Diameter of Drill 钻头直径 D Fraction 分数 No. 数字 Ltr. 字母 Mm 毫米 Decimal Inch Equivalent 等效的十 进位法英 寸 0.0 0. 58 57 1.10 1.15 56 3/64 1.20 1.25 1.30 55 0.0 0,3 0.5 0.2 0.2 0.0520 Millimeter Equivalent 等效的毫 米 Flute Length 槽长 F Inch 英寸 Mm 毫米 Overall Length 全长 L Inch 英寸 Mm 毫米1.00 60 591.000 1.016 1.041 1.050 1.067 1.092 1.100 1.150 1.181 1.191 1.200 1.250 1.300 1.3211/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 1/2 5/8 5/8 5/8 5/813 13 13 13 13 13 13 13 13 13 16 16 16 161 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 3/8 1 5/8 1 5/8 1 5/8 1 5/835 35 35 35 35 35 35 35 35 35 41 41 41 41COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLS1.35 54 1.40 1.45 1.50 53 1.55 1/16 1.60 52 1.650.0 0.1 0.5 0.5 0.5 0.06501.350 1.397 1.400 1.450 1.500 1.511 1.550 1.588 1.600 1.613 1.6505/8 5/8 5/8 5/8 5/8 5/8 5/8 5/8 11/16 11/16 11/1616 16 16 16 16 16 16 16 17 17 171 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 5/8 1 11/16 1 11/16 1 11/1641 41 41 41 41 41 41 41 43 43 43COPYRIGHT American Society of Mechanical Engineers Licensed by Information Handling ServicesASME B94.11M-1993TWIST DRILLSTABLE 3A GENERAL DIMENSIONS OF STRAIGHT SHANK TWIST DRILLS C SCREW MACHINE LENGTH C THROUGH 1 in. (25.4 mm) DIA. FRACTIONAL, NUMBER, LETTER AND METRIC SIZES (CONT’D) 表3A - 直柄麻花钻主要尺寸 - 螺丝车床长度-直径至1英寸 （25.4mm） 分数、 ， 数字、 字母和米制尺寸 （续） Diameter of Drill 钻头直径 D Fraction 分数 No. 数字 Ltr. 字母 Mm 毫米 Decimal Inch Equivalent 等效的十 进位法英 寸 0.0 1.75 50 1.80 1.85 49 1.90 48 1.95 5/64 47 2.00 2.05 46 45 2.10 2.15 44 2.20 2.25 43 2.30 2.35 42 3/32 2.40 0.0 0.8 0.8 0.8 0.5 0.7 0.0 0.6 0.6 0.0 0.5 0.8 0.0945 Millimeter Equivalent 等效的毫 米 Flute Length 槽长 F Inch 英寸 Mm 毫米 Inch 英寸 Overall Length 全长 L Mm 毫米1.70 511.700 1.702 1.750 1.778 1.800 1.850 1.854 1.900 1.930 1.950 1.984 1.994 2.000 2.050 2.057 2.083 2.100 2.150 2.184 2,200 2.250 2.261 2.300 2.350 2.375 2.383 2.40011/16 11/16 11/16 11/16 11/16 11/16 11/16 11/16 11/16 11/16 11/16 11/16 11/16 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 13/1617 17 17 17 17 17 17 17 17 17 17 17 17 19 19 19 19 19 19 19 19 19 19 19 19 19 211 11/16 1 11/16 1 11/16 1 11/16 1 }