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1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243 TO PLACE A DOCU
3、MENT ORDER; (724) 776-4970 FAX: (724) 776-0790 SAE WEB ADDRESS http:/www.sae.org Copyright 1998 Society of Automotive Engineers, Inc. All rights reserved.Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 RECOMMENDED PRACTICE Submitted for recognition as an American
4、National Standard J2123 REV. OCT1998 Issued1990-11 Revised1998-10 Supserseding J2123 SEP95 Numbering System for Taps 1.Scope This SAE Recommended Practice provides a systematic method for the identification of ground thread taps for inch sizes up to 9.999 in with a Maximum Thread-per-Inch of 99.9, a
5、nd Metric sizes up to 99.9 mm with a Maximum pitch of 9.99 mm. It is intended to assist in the cataloging and supplying of these tools. It is not intended for ACME, Buttress, or similar type thread forms. NOTE 1 Caution must be taken when assigning codes to prevent specifying taps that cannot be phy
6、sically or economically manufactured. NOTE 2 The Code Number coming from the manufacturer MUST reflect the actual tool construction. NOTE 3 In particular without limitation, SAE disclaims all responsibility for the accuracy or completeness of information contained within this report if the standards
7、 of this report are retrieved, combined, or used in connection with any software. 2.References 2.1Applicable Publications The following publications (latest revision) form a part of the specification to the extent specified herein. NOTE Reference information not specified to be manufacturer s standa
8、rd practices. Manufacturer to supply additional technical information upon request. 2.1.1ASME PUBLICATIONS Available from American Society of Mechanical Engineers Order Department, 22 Law Drive, Box 2300, Fairfield, New Jersey 07007-2300. (The publications are also available through American Nationa
9、l Standards Institute.) ASME B94.9 Taps Cut and Ground Threads 2.2Related Publications The following publications are provided for information purposes only and are not a required part of this document. 2.2.1NUMBERING SYSTEMS SOFTWARE Software products may exist to assist in the use of the standard.
10、 The following software product(s) are listed for information purposes only and do not constitute part of this document. SAE expressly disclaims any responsibility for the operation of any Software used in connection with your use of this report. SAE J2123 Revised OCT1998 -2- 2.2.1.1Datom Engineerin
11、g Software, Inc., Publication Available from Datom Engineering Software, Inc., 561 Somerset, Suite 3, Crystal Lake, IL 60014, (815) 477-3380. Datom Engineering Software, Inc., TMS III-Drills-Electronic Reference Manual Nomenclature, Definitions, Sizes, and Tolerances of Twist Drills 2.2.2ISO PUBLICA
12、TIONS Available from International Organization for Standardization, 1 Rue DeVarembe, Case Postal 56, CH1211 Geneva 20 Switzerland. (The publications are also available through American National Standards Institute.) ISO 529 Short machine taps and hand taps Second Edition ISO 2283 Long shank machine
13、 taps with nominal diameters from 3 to 24 mm and 1/8 to 1 in First Edition (Amendment 1-1977) (Erratum Aug. 1976) ISO 2284 Hand taps for parallel and taper pipe threads General dimensions and marking Third Edition ISO 2857 Ground thread taps for ISO metric threads of tolerances 4H to 8H and 4G to 6G
14、 Course and fine pitches Manufacturing tolerances on the threaded portion First Edition (Amendment 1-1984) (Amendment 2-1986) (Corrigendum 1-1990) ISO 5967 Taps and thread cutting Nomenclature of the main types and terminology First Edition ISO 5969 Ground thread taps for pipe threads G series and R
15、p series Tolerances on the threaded portion First Edition (Corrigendum 1-1991) ISO 8051 Long shank taps with nominal diameters from M3 to M10 Taps with reinforced shank and recess First Edition ISO 8830 High speed steel machine taps with ground threads Technical specifications First Edition 2.2.3JIS
16、 PUBLICATIONS Available from Japanese Industrial Standards Committee, c/o Standards Department, Agency of Industrial Science and Technology, Ministry of International Trade and Industry, 1-3-1, Kasumigaseki, Chiyoda-ku, Tokyo 100, Japan. (The publications are also available through American National
17、 Standards Institute.) JIS B4430 Short Machine Taps and Hand Taps for Metric Threads Errata 1994 JIS B4432 Hand Taps for Unified Coarse Thread JIS B4433 Nut Taps JIS B4438 Hand Taps for Unified Fine Thread JIS B4439 Hand Taps for Sewing Machine Thread JIS B4445 Hand Taps for Pipe Threads for Paralle
18、l Threads JIS B4446 Hand Taps for Pipe Threads for Taper Threads 2.2.4USCTI PUBLICATIONS Available from United States Cutting Tool Institute, 1300 Summer Avenue, Cleveland, OH 44115. Handbook of Standard Taps 3.Numbering System 3.1Formats The basic numbering system is subdivided into two formats for
19、 taps: 3.1.1FORMAT 21 POSITION Taps with overall lengths which comply with the referenced Standards. 3.1.2FORMAT 26 POSITION For Extension, Pulley, and Other Taps with overall lengths which do not comply with the referenced Standards. SAE J2123 Revised OCT1998 -3- 3.2Content of Numbering System The
20、numbering system utilizes 21 and 26 positions to fully describe the various dimensions, types, materials, and characteristics of taps. Figure 1 illustrates the content and sequence of the 21 positions in the numbering system for taps whose overall lengths comply with the referenced Standards. FIGURE
21、 1 21 POSITION FORMAT SAE J2123 Revised OCT1998 -4- Figure 2 illustrates the content and sequence of the 26 positions in the numbering system for extension taps, pulley taps, and taps whose overall lengths do not comply with the referenced Standards. FIGURE 2 26 POSITION FORMAT 3.3Positions The cont
22、ent of each position is explained in detail in the following sections: 3.3.1POSITIONS 1 AND 2, CATEGORY AND NOUN Positions 1 and 2 will always be alphabetical. The following designations have been assigned: Position 1: T designates TOOL Position 2: T designates TAP 3.3.2POSITION 3, TYPE Position 3 w
23、ill be alpha or numeric based on the type of tap. The following codes have been assigned for taps without oil holes: 1 Standard Straight Thread (Fractional, Machine Screw, or Metric) 2 Taper Pipe 3 Straight Pipe 4 Pulley 5 Nut 6 Thread Forming 7 Standard Straight Thread Screw Thread Insert (S.T.I.)
24、8 Extension 9 Short Thread Length W Taper Pipe Small Shank (1/8 in nominal diameter) X Straight Pipe Small Shank (1/8 in nominal diameter) SAE J2123 Revised OCT1998 -5- The following codes have been assigned for taps with thru oil holes: A Standard Straight Thread (Fractional, Machine Screw, or Metr
25、ic) with oil hole B Taper Pipe with oil hole C Straight Pipe with oil hole D Pulley with oil hole E Nut with oil hole F Thread Forming with oil hole G Standard Straight Thread Screw Thread Insert (S.T.I.) with oil hole H Extension with oil hole I Short Thread Length with oil hole Y Taper Pipe Small
26、Shank (1/8 in nominal diameter) with oil hole Z Straight Pipe Small Shank (1/8 in nominal diameter) with oil hole 3.3.3POSITION 4, MEASUREMENT DESIGNATOR, HAND OF THREAD, AND APPLICABLE INDUSTRY STANDARD FOR GEN- ERAL DIMENSIONS Position 4 will be alpha or numeric. The following codes have been assi
27、gned: C Right Hand Inch ASME/ANSI Standards L Left Hand Inch ASME/ANSI Standards M Right Hand Metric ASME/ANSI Standards N Left Hand Metric ASME/ANSI Standards U Right Hand Metric DIN Standards V Left Hand Metric DIN Standards W Right Hand Metric ISO Standards Z Left Hand Metric ISO Standards J Righ
28、t Hand Metric JIS Standards S Left Hand Metric JIS Standards 3.3.4POSITION 5, 6, 7, 8, 9, 10, 11, AND 12, NOMINAL SIZE (DIAMETER) AND PITCH There are three formats used for Nominal Size and Pitch depending on whether the tap threads are metric, inch, or pipe sizes. NOTE Use zeros for all open positi
29、ons. 3.3.4.1Nominal Size and Pitch Tap (Metric) When Position 4 indicates “M,” “N,” “U,” “V,” “W,” “ Z,” “J,” or “S” Nominal size will be specified to the nearest tenth of a millimeter (one place to the right of the decimal point) with an “M” located in Position 5. It is assumed that there is a deci
30、mal point located between Positions 7 and 8. Position 9 will always have an “X” to separate metric nominal size and pitch. Pitch will be specified to the nearest hundredth of a millimeter (two places to the right of the decimal point). It is assumed that there is a decimal point located between Posi
31、tions 10 and 11. Maximum nominal size will be (99.9 mm) Maximum pitch will be (9.99 mm) SAE J2123 Revised OCT1998 -6- Examples: M 0 1 6 x 0 3 5(M 1.6 x 0.35) M 0 8 0 x 1 2 5(M 8 x 1.25) M 2 4 0 x 3 0 0(M 24 x 3) M 3 0 0 x 3 5 0(M 30 x 3.5) 3.3.4.2Nominal Size and Threads Per Inch Tap (Inch) When Pos
32、ition 4 indicates “C” or “L” Nominal Size will be specified to the nearest ten thousandths of an inch (four places to the right of the decimal point). It is assumed that there is a decimal point located between Positions 5 and 6. Maximum nominal size will be (9.9999 in). Threads per Inch (TPI) will
33、be specified to the nearest tenth of a TPI (one place to the right of the decimal point). It is assumed that there is a decimal point located between Positions 11 and 12, allowing for a decimal part of TPI, such as 11.5 or 04.5. Maximum threads per Inch will be (99.9). Examples: 0 2 5 0 0 2 0 0(1/4
34、(0.2500) 20 NC) 0 1 9 0 0 3 2 0(#10 (0.1900) 32 NF) 0 6 8 7 5 1 6 0(11/16 (0.6875) 16 NS) 2 0 0 0 0 0 4 5(2.0 in 4.5 NC) Reference Table of Decimal Equivalents for Machine Screw Sizes (see Table 1). TABLE 1 DECIMAL EQUIVALENTS FOR MACHINE SCREW SIZES Machine Screw No.Decimal Equivalent 00.0600 10.07
35、30 20.0860 30.0990 40.1120 50.1250 60.1380 80.1640 100.1900 120.2160 SAE J2123 Revised OCT1998 -7- 3.3.4.3Nominal Size and Pitch Pipe Taps When Position 3 indicates: “2” (Taper Pipe) “3” (Straight Pipe) “B” (Taper Pipe with oil hole) “C” (Straight Pipe with oil hole) “W” (Taper Pipe Small Shank) “X”
36、 (Straight Pipe Small Shank) “Y” (Taper Pipe Small Shank with oil hole) “Z” (Straight Pipe Small Shank with oil hole) Nominal Size will be specified to the nearest thousandths of an inch (three places to the right of the decimal point). It is assumed that there is a decimal point located between Pos
37、itions 5 and 6. Threads per Inch will be the standard for the Pipe Nominal Size shown and not entered into this format. Maximum nominal size will be (8.000 in). Minimum nominal size will be (0.063 = 1/16 in). Pipe Thread Form will be designated in Position 9. The following codes have been assigned:
38、A NPT Regular Taper B NPT Regular Taper with Interrupted Threads C NPTF Dryseal Taper D NPTF Dryseal Taper with Interrupted Threads E PTF Dryseal SAE Short Taper F PTF Dryseal SAE Short Taper with Interrupted Threads G NPSI Dryseal Straight Intermediate H NPS Standard Straight Pipe (NPSC or NPSM) I
39、NPSF Dryseal Straight J ANPT Aeronautical Taper (NPT) K NPSH Straight Pipe for Hose Couplings and Nipples L NPSL Straight Pipe for Locknuts M NGT National Gas Taper (NPT) N NGS National Gas Straight P NGO National Gas Outlet Taper Pipe Tap Projection Through Standard L1 Ring Gage will be designated
40、in nearest thousandth of an inch (three places to the right of the decimal point), using Positions 10, 11, and 12. It is assumed there is a decimal point located between Positions 9 and 10. For Taper Pipe Taps with standard projection use letters STD in Positions 10, 11, and 12. For Taper Pipe Taps
41、with other than standard projection, use Positions 10, 11, and 12 to designate decimal projection length. Maximum decimal projection length will be (0.999 in). For Straight Pipe Taps, Positions 10, 11, and 12 will be filled in with zeros (000). SAE J2123 Revised OCT1998 -8- Examples: 8 0 0 0 A S T D
42、 (8 in 8 NPT STD Proj.) 4 0 0 0 A 9 5 0(4 in 8 NPT .950 Proj.) 0 3 7 5 F S T D (3/8 in 18 PTF STD Int.) 0 0 6 3 1 0 0 0(1/16 in 27 NPSF) 3.3.5POSITION 13, MATERIAL Position 13 will be alpha or numeric. Manufacturer s Standard should be used unless proven that a specific material must be used for a s
43、pecific application. The following codes have been assigned: Manufacturer s Standard H High Speed Steel C Cobalt High Speed Steel (at least 4.5% Cobalt) V Vanadium High Speed Steel (at least 2.6% Vanadium) E Cobalt/Vanadium High Speed Steel (at least 4.5% Cobalt or at least 2.6% Vanadium) 7 Cobalt/V
44、anadium High Speed Steel (at least 4.5% Cobalt and at least 2.6% Vanadium) 8 Tungston High Speed Steel 9 Tungston/Cobalt High Speed Steel S Solid Carbide T Carbide Tipped Z Solid Carbide Micro Grain Other (To be used only in select instances where a specific material has proven to be a key factor.)
45、I High Speed SteelM1 J High Speed SteelM2 2 High Speed SteelM3 Type 2 K High Speed SteelM7 L High Speed SteelM10 M Cobalt High Speed SteelT15 D Cobalt High Speed SteelM35 5 Cobalt High Speed SteelM42 F Cobalt High Speed SteelM33 Q Solid CarbideC2 N Solid CarbideC3 R Solid CarbideC5 G Carbide Inserte
46、d SAE J2123 Revised OCT1998 -9- 3.3.6POSITION 14, SURFACE TREATMENT Position 14 can be alpha or numeric. The following codes have been assigned: S Manufacturer s Standard Treated (for ordering purposes only) Other 1 Untreated (Bright) 2 Steam Oxide 3 Nitride Plus Steam Oxide 4 Nitride Only 6 Bronze
47、Oxide (Straw Draw) A Titanium Nitride (TiN) B Titanium Carbo Nitride (TiCN) C Titanium Aluminum Nitride (TiAIN) D Chrome Nitride (CrN) E Chrome Carbide (CrC) F Boron Carbide (BC) G Zirconium Nitride (ZrN) H Chrome (Cr) 3.3.7POSITION 15, CUTTING FACE ANGLE When Position 3 indicates: “6” (Thread Formi
48、ng) “F” (Thread Forming with oil hole) Then Position 15 will always be “0” (No Rake or Hook). The values listed reflect the typical range that can be expected due to manufacturing tolerance and the difference in measurement techniques. Position 15 will be numeric. The following codes have been assigned: 1 Negative Hook6 to 0 2 Zero Hook3 to +3 3 Medium Hook+3 to +9 4 High Hook+10 to +16 5 Negative Rake6 to 0 6 Zero Rake3 to +3 7 Medium Rake+3 to +9 8 High Rake+10 to +16 0 No Rake or Hook (Thread Forming Tap) NOTE Hook angles shown are C