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 entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, 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) 776-0243TO PLACE A DOCUMENT
3、 ORDER; (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS http:/www.sae.orgCopyright 1998 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001RECOMMENDEDPRACTICESubmitted for recognition as an American National Sta
4、ndardJ2123REV.OCT1998Issued 1990-11Revised 1998-10Supserseding J2123 SEP95Numbering System for Taps1. ScopeThis SAE Recommended Practice provides a systematic method for the identification of groundthread taps for inch sizes up to 9.999 in with a Maximum Thread-per-Inch of 99.9, and Metric sizes up
5、to99.9mm with a Maximum pitch of 9.99 mm. It is intended to assist in the cataloging and supplying of thesetools. It is not intended for ACME, Buttress, or similar type thread forms.NOTE 1Caution must be taken when assigning codes to prevent specifying taps that cannot be physically oreconomically m
6、anufactured.NOTE 2The Code Number coming from the manufacturer MUST reflect the actual tool construction.NOTE 3In particular without limitation, SAE disclaims all responsibility for the accuracy or completeness ofinformation contained within this report if the standards of this report are retrieved,
7、 combined, orused in connection with any software.2. References2.1 Applicable PublicationsThe following publications (latest revision) form a part of the specification to theextent specified herein.NOTEReference information not specified to be manufacturers standard practices. Manufacturer tosupply
8、additional technical information upon request.2.1.1 ASME PUBLICATIONSAvailable from American Society of Mechanical Engineers Order Department, 22 LawDrive, Box 2300, Fairfield, New Jersey 07007-2300. (The publications are also available through AmericanNational Standards Institute.)ASME B94.9TapsCut
9、 and Ground Threads2.2 Related PublicationsThe following publications are provided for information purposes only and are not arequired part of this document.2.2.1 NUMBERING SYSTEMS SOFTWARESoftware products may exist to assist in the use of the standard. Thefollowing software product(s) are listed f
10、or information purposes only and do not constitute part of thisdocument. SAE expressly disclaims any responsibility for the operation of any Software used inconnection with your use of this report.SAE J2123 Revised OCT1998-2-2.2.1.1 Datom Engineering Software, Inc., PublicationAvailable from Datom E
11、ngineering Software, Inc., 561Somerset, 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 Drills2.2.2 ISO PUBLICATIONSAvailable from International Organization for Stan
12、dardization, 1 Rue DeVarembe, CasePostal 56, CH1211 Geneva 20 Switzerland. (The publications are also available through American NationalStandards Institute.)ISO529Short machine taps and hand tapsSecond EditionISO2283Long shank machine taps with nominal diameters from 3 to 24 mm and 1/8 to 1 inFirst
13、Edition (Amendment 1-1977) (ErratumAug. 1976)ISO2284Hand taps for parallel and taper pipe threadsGeneral dimensions and markingThirdEditionISO2857Ground thread taps for ISO metric threads of tolerances 4H to 8H and 4G to 6G Course andfine pitchesManufacturing tolerances on the threaded portionFirst
14、Edition(Amendment 1-1984)(Amendment 2-1986) (Corrigendum 1-1990)ISO5967Taps and thread cuttingNomenclature of the main types and terminologyFirst EditionISO5969Ground thread taps for pipe threads G series and Rp seriesTolerances on the threadedportionFirst Edition(Corrigendum 1-1991)ISO8051Long shan
15、k taps with nominal diameters from M3 to M10Taps with reinforced shank andrecessFirst EditionISO8830High speed steel machine taps with ground threadsTechnical specificationsFirst Edition2.2.3 JIS PUBLICATIONSAvailable from Japanese Industrial Standards Committee, c/o Standards Department,Agency of I
16、ndustrial Science and Technology, Ministry of International Trade and Industry, 1-3-1,Kasumigaseki, Chiyoda-ku, Tokyo 100, Japan. (The publications are also available through AmericanNational Standards Institute.)JIS B4430Short Machine Taps and Hand Taps for Metric Threads Errata1994JIS B4432Hand Ta
17、ps for Unified Coarse ThreadJIS B4433Nut TapsJIS B4438Hand Taps for Unified Fine ThreadJIS B4439Hand Taps for Sewing Machine ThreadJIS B4445Hand Taps for Pipe Threads for Parallel ThreadsJIS B4446Hand Taps for Pipe Threads for Taper Threads2.2.4 USCTI PUBLICATIONSAvailable from United States Cutting
18、 Tool Institute, 1300 Summer Avenue, Cleveland,OH 44115.Handbook of Standard Taps3. Numbering System3.1 FormatsThe basic numbering system is subdivided into two formats for taps:3.1.1 FORMAT21 POSITIONTaps with overall lengths which comply with the referenced Standards.3.1.2 FORMAT26 POSITIONFor Ext
19、ension, Pulley, and Other Taps with overall lengths which do not comply withthe referenced Standards.SAE J2123 Revised OCT1998-3-3.2 Content of Numbering SystemThe numbering system utilizes 21 and 26 positions to fully describe thevarious dimensions, types, materials, and characteristics of taps.Fig
20、ure 1 illustrates the content and sequence of the 21 positions in the numbering system for taps whoseoverall lengths comply with the referenced Standards.FIGURE 121 POSITION FORMATSAE J2123 Revised OCT1998-4-Figure 2 illustrates the content and sequence of the 26 positions in the numbering system fo
21、r extension taps,pulley taps, and taps whose overall lengths do not comply with the referenced Standards.FIGURE 226 POSITION FORMAT3.3 PositionsThe content of each position is explained in detail in the following sections:3.3.1 POSITIONS 1 AND 2, CATEGORY AND NOUNPositions 1 and 2 will always be alp
22、habetical. The followingdesignations have been assigned:Position 1: Tdesignates TOOLPosition 2: Tdesignates TAP3.3.2 POSITION 3, TYPEPosition 3 will be alpha or numeric based on the type of tap. The following codes havebeen assigned for taps without oil holes:1 Standard Straight Thread (Fractional,
23、Machine Screw, or Metric)2 Taper Pipe3 Straight Pipe4 Pulley5 Nut6 Thread Forming7 Standard Straight ThreadScrew Thread Insert (S.T.I.)8 Extension9 Short Thread LengthW Taper PipeSmall Shank (1/8 in nominal diameter)X Straight PipeSmall Shank (1/8 in nominal diameter)SAE J2123 Revised OCT1998-5-The
24、following codes have been assigned for taps with thru oil holes:A Standard Straight Thread (Fractional, Machine Screw, or Metric) with oil holeB Taper Pipe with oil holeC Straight Pipe with oil holeD Pulley with oil holeE Nut with oil holeF Thread Forming with oil holeG Standard Straight Thread Scre
25、w Thread Insert (S.T.I.) with oil holeH Extension with oil holeI Short Thread Length with oil holeY Taper Pipe Small Shank (1/8 in nominal diameter) with oil holeZ Straight Pipe Small Shank (1/8 in nominal diameter) with oil hole3.3.3 POSITION 4, MEASUREMENT DESIGNATOR, HAND OF THREAD, AND APPLICABL
26、E INDUSTRY STANDARD FOR GEN-ERAL DIMENSIONSPosition 4 will be alpha or numeric. The following codes have been assigned:C Right Hand Inch ASME/ANSI StandardsL Left Hand Inch ASME/ANSI StandardsM Right Hand Metric ASME/ANSI StandardsN Left Hand Metric ASME/ANSI StandardsU Right Hand Metric DIN Standar
27、dsV Left Hand Metric DIN StandardsW Right Hand Metric ISO StandardsZ Left Hand Metric ISO StandardsJ Right Hand Metric JIS StandardsS Left Hand Metric JIS Standards3.3.4 POSITION 5, 6, 7, 8, 9, 10, 11, AND 12, NOMINAL SIZE (DIAMETER) AND PITCHThere are three formats usedfor Nominal Size and Pitch de
28、pending on whether the tap threads are metric, inch, or pipe sizes.NOTEUse zeros for all open positions.3.3.4.1 Nominal Size and PitchTap (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 r
29、ight of the decimalpoint) with an “M” located in Position 5. It is assumed that there is a decimal point located betweenPositions 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 r
30、ight of the decimal point).It is assumed that there is a decimal point located between Positions 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
31、 0 0 x 3 5 0 (M 30 x 3.5)3.3.4.2 Nominal Size and Threads Per InchTap (Inch)When Position 4 indicates “C” or “L”Nominal Size will be specified to the nearest ten thousandths of an inch (four places to the right of thedecimal point). It is assumed that there is a decimal point located between Positio
32、ns 5 and 6.Maximum nominal size will be (9.9999 in).Threads per Inch (TPI) will be specified to the nearest tenth of a TPI (one place to the right of the decimalpoint). It is assumed that there is a decimal point located between Positions 11 and 12, allowing for adecimal part of TPI, such as 11.5 or
33、 04.5.Maximum threads per Inch will be (99.9).Examples:0 2 5 0 0 2 0 0 (1/4 (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 1DECIMAL EQUIVALENTS
34、FOR MACHINE SCREW SIZESMachine Screw No. Decimal Equivalent0 0.06001 0.07302 0.08603 0.09904 0.11205 0.12506 0.13808 0.164010 0.190012 0.2160SAE J2123 Revised OCT1998-7-3.3.4.3 Nominal Size and PitchPipe TapsWhen Position 3 indicates:“2” (Taper Pipe)“3” (Straight Pipe)“B” (Taper Pipe with oil hole)“
35、C” (Straight Pipe with oil hole)“W” (Taper Pipe Small Shank)“X” (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 thedecimal point). It i
36、s assumed that there is a decimal point located between Positions 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
37、in Position 9. The following codes have been assigned:A NPT Regular TaperB NPT Regular Taper with Interrupted ThreadsC NPTF Dryseal TaperD NPTF Dryseal Taper with Interrupted ThreadsE PTF Dryseal SAE Short TaperF PTF Dryseal SAE Short Taper with Interrupted ThreadsG NPSI Dryseal Straight Intermediat
38、eH NPS Standard Straight Pipe (NPSC or NPSM)I NPSF Dryseal StraightJ ANPT Aeronautical Taper (NPT)K NPSH Straight Pipe for Hose Couplings and NipplesL NPSL Straight Pipe for LocknutsM NGT National Gas Taper (NPT)N NGS National Gas StraightP NGO National Gas OutletTaper Pipe Tap Projection Through St
39、andard L1 Ring Gage will be designated in nearest thousandth of aninch (three places to the right of the decimal point), using Positions 10, 11, and 12. It is assumed there is adecimal point located between Positions 9 and 10.For Taper Pipe Taps with standard projection use letters STD in Positions
40、10, 11, and 12.For Taper Pipe Taps with other than standard projection, use Positions 10, 11, and 12 to designate decimalprojection 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 OCT199
41、8-8-Examples:8 0 0 0 A S T D (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)3.3.5 POSITION 13, MATERIALPosition 13 will be alpha or numeric. Manufacturers Standard should be usedunless proven that a specific mater
42、ial must be used for a specific application. The following codes have beenassigned:Manufacturers StandardH High Speed SteelC 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% Van
43、adium)7 Cobalt/Vanadium High Speed Steel (at least 4.5% Cobalt and at least 2.6% Vanadium)8 Tungston High Speed Steel9 Tungston/Cobalt High Speed SteelS Solid CarbideT Carbide TippedZ Solid Carbide Micro GrainOther (To be used only in select instances where a specific material has proven to be a key
44、 factor.)I High Speed Steel M1J High Speed Steel M22 High Speed Steel M3 Type 2K High Speed Steel M7L High Speed Steel M10M Cobalt High Speed Steel T15D Cobalt High Speed Steel M355 Cobalt High Speed Steel M42F Cobalt High Speed Steel M33Q Solid Carbide C2N Solid Carbide C3R Solid Carbide C5G Carbid
45、e InsertedSAE J2123 Revised OCT1998-9-3.3.6 POSITION 14, SURFACE TREATMENTPosition 14 can be alpha or numeric. The following codes have beenassigned:S Manufacturers Standard Treated (for ordering purposes only)Other1 Untreated (Bright)2 Steam Oxide3 Nitride Plus Steam Oxide4 Nitride Only6 Bronze Oxi
46、de (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)3.3.7 POSITION 15, CUTTING FACE ANGLEWhen Position 3 indicates:“6” (Thread Forming)“F” (Threa
47、d Formingwith 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 thedifference in measurement techniques.Position 15 will be numeric. The following codes have been assigned:1 Negative Hook
48、 6 to 02 Zero Hook 3 to +33 Medium Hook +3 to +94 High Hook +10 to +165 Negative Rake 6 to 06 Zero Rake 3 to +37 Medium Rake +3 to +98 High Rake +10 to +160 No Rake or Hook (Thread Forming Tap)NOTEHook angles shown are Chordal Hook, which is defined in ASME/ANSI B94.9. Taps as theangle made between a radial line from the tap major diameter to centerline and a line from thetap major diameter that passes through the basic minor diameter of the tap.SAE J2123 Revised OCT1998-10-3.3.8 POSITION 16
