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: (412) 772-8512 FAX: (412) 776-0243TO PLACE A DOCUMENT
3、 ORDER; (412) 776-4970 FAX: (412) 776-0790SAE WEB ADDRESS http:/www.sae.orgCopyright 1995 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、ndardJ543REV.NOV95Issued 1917-08Revised 1995-11Superseding J543 JUN88(R) STARTING MOTOR PINIONS AND RING GEARSForewordThis Document has not changed other than to put it into the new SAE Technical Standards BoardFormat.1. ScopeThe scope of this document is to provide uniform guidelines for the applic
5、ation of starter motorpinions and ring gears. SAE J543 contains guidelines for the use of diametral pitch gearing. The pinion datashown are based on the Fellows stub tooth system. Refer to ISO 8123, ISO 9457-1, and ISO 9457-2 formodule gearing, and corresponding metric dimensions.2. References2.1 Ap
6、plicable PublicationsThe following publications form a part of this specification to the extent specifiedherein.2.1.1 ISO PUBLICATIONSAvailable from ANSI, 11 West 42nd Street, New York, NY 10036-8002.ISO 8123Diametral pitch starter motor pinionsISO 9457-1Road vehiclesMetric starter motor pinionsPart
7、 1: Currently used pinionsISO 9457-2Road vehiclesMetric starter motor pinionsPart 2: Pinions with 20 degree pressure angleCOPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J543 Revised NOV95-2-3. Calculations for Spur GearsTable 1 and Figures 1 to 3 are to b
8、e used as a guide in establishing startermotor pinions and ring gear designs. Consult the gear manufacturer for detail dimensions.TABLE 1SPUR GEAR DIMENSIONSP1/P2(1)1. The two diametral pitch gear data are based on Fellows stub tooth system.P.A.(deg) N1/N2O.D.MAX.(in)P.D.THEO.(in)P.D.LAYOUT(in)R.D.M
9、AX.(2)(in)2. If larger root diameter is desired, consult gear manufacturers.HT(in)C.T.TMAX.(3)(in)3. Circular Tooth Thickness.W2 MAX.(in)12/14 12 10.48/9 1.016 0.750 0.873 0.695 0.1607 0.161 0.41610/12 20 10/9 1.167 0.900 1.000 0.789 0.1890 0.188 0.48410/12 20 10/9 1.167 0.900 1.000 0.789 0.1890 0.1
10、87 0.48510/12 20 12/11 1.367 1.100 1.200 0.989 0.1890 0.187 0.48610/12 20 13/12 1.467 1.200 1.300 1.089 0.1890 0.187 0.4888/10 20 10/9 1.450 1.125 1.250 1.000 0.2250 0.245 0.6158/10 20 11/10 1.575 1.250 1.375 1.125 0.2250 0.245 0.6178/10 20 12/11 1.700 1.375 1.500 1.250 0.2250 0.245 0.6188/10 20 13/
11、12 1.825 1.500 1.625 1.375 0.2250 0.245 0.6198/10 20 14/13 1.950 1.625 1.750 1.525 0.2125 0.244 0.6226/8 20 12/11 2.240 1.833 2.000 1.688 0.2760 0.317 0.814COPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J543 Revised NOV95-3-FIGURE 1SPUR GEAR DETAIL(Eq. 1)
12、(Eq. 2)(Eq. 3)(Eq. 4)where:N1 = Blank SizeN2 = Number of TeethP1/P2 = Diametral pitch for Fellows stub tooth. Use P1 to determine number of teeth, pitch diameter, andtooth thickness. Use P2 to determine addendum, dedendum, and tooth depth.P.A. = Pressure Angle4. Ring Gear and Pinion InstallationBack
13、lash is necessary for free meshing and running of the pinion withthe ring gear. Backlash may be obtained by increasing the center distance as shown in Figure 2 or by reducingthe tooth thickness.Outside Diameter (O.D.)N1 P12P2+=Theoretical Pitch Diameter (P.D.)N2 P1=Layout Pitch DiameterN1 P1=Base Ci
14、rcle Diameter (Db)P.D. P.A.cos=COPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J543 Revised NOV95-4-FIGURE 2PINION AND RING GEAR5. Center DistanceThe formula for calculating center distance (C.D.) is:(Eq. 5)where:a = The number of teeth is equal to the num
15、ber used to determine blank size. A blank is a disk or cylinderof such size as to relate to a standard gear of standard addendum, dedendum and given number ofteeth. To increase tooth strength and improve cranking ratio, many gears are cut on an oversize blank,i.e., 10 teeth cut on an 11 tooth blank.
16、 In this example, 11 would be used for the number of pinion teethin calculating center distance.b = For fractional diametral pitch (example: 8/10 pitch), use the numerator (8 in this example) for centerdistance calculation.c = C is the increase in center distance to obtain backlash Figure 2. If back
17、lash is obtained by reducingtooth thickness, omit C from the C.D. formula.Center Distance for starter drives, for 12, 12/14 and finer pitch, is held to theoretical values, with a tolerance of0.010 in. Backlash is designed into the ring gear by thinning the teeth and should be 0.010 to 0.030 in. Spre
18、adof centers for 10/12 and coarser pitch should be 0.020 to 0.040 in to produce backlash of 0.015 to 0.030 in,using the Equation 6:(Eq. 6)where:C = spread of centersP.A. = pressure angleC.D.No. Ring Gear Teeth (Blank)a No. Pinion Teeth (Blank)a+2Diametral Pitchb- Cc+=backlash2 C P.A.tan=COPYRIGHT So
19、ciety of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J543 Revised NOV95-5-6. Ring Gear DesignRing gears of 10/12 pitch and finer are normally not chamfered. Gears coarser than10/12 pitch should be chamfered in accordance with Figure 3.FIGURE 3RING GEAR DETAIL7. Ring Gear H
20、ardnessHardness range for typical ring gears after assembly is:8/10 pitch and coarser Rockwell C455210/12 pitch and finer Rockwell C48558. Notes8.1 Marginal IndiciaThe change bar (l) located in the left margin is for the convenience of the user in locatingareas where technical revisions have been ma
21、de to the previous issue of the report. An (R) symbol to the leftof the document title indicates a complete revision of the report.PREPARED BY THE SAE CRANKING MOTOR STANDARDS COMMITTEECOPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling ServicesSAE J543 Revised NOV95Ratio
22、naleThis document has been revised as follows:a. To make reference to related ISO documents.b. To comply with required SAE formatting guidelines.Relationship of SAE Standard to ISO StandardSAE J543 contains guidelines for the use of diametralpitch gearing. The pinion data shown are based on fellows
23、stub tooth system. Refer to ISO 8123, ISO9457-1, and ISO 9457-2 for module gearing, and corresponding metric dimensions.ApplicationTable 1 and Figures 1 to 3 included in this SAE Standard are to be used as a guide inestablishing starting motor pinions and ring gear designs. Consult the gear manufact
24、urer for detaildimensions.Reference SectionISO 8123Diametral pitch starter motor opinionsISO 9457-1Road vehiclesMetric starter motor pinionsPart 1: Currently used pinionsISO9457-2Road vehiclesMetric starter motor pinionsPart 2: Pinions with 20 degree pressureangleDeveloped by the SAE Cranking Motor Standards CommitteeCOPYRIGHT Society of Automotive Engineers, Inc.Licensed by Information Handling Services
