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 1991 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001RECOMMENDEDPRACTICEAn American National StandardJ542REV.JUN91Issued 1917
4、08Revised 1991-06Superseding J542 APR87(R) STARTING MOTOR MOUNTINGS1. ScopeThe purpose of this SAE Recommended Practice is to provide standardized dimensions for mountingstarting motors. (See Figures 1 through 4.)It is recommended that a full register diameter having a minimum depth of 2.54 mm (0.1
5、00 in) be provided inthe flywheel housing to insure proper control of gear center distance and clearance between pitch diameters.The clearance between the starting motor pilot diameter and the register diameter in the flywheel housingshould be 0.03 mm (0.001 in) minimum to 0.25 mm (0.010 in) maximum
6、Text noted with an asterisk in Figures 1, 2, and 3, should not exceed root radius of pinion in order to provideclearance for the flywheel.The face of the starting motor mounting flange should be relieved at its junction with the pilot diameter to avoidmounting interference with flywheel housing.For
7、 backlash allowance between the pinion and ring gear refer to SAE J543.Dimensional unitsmillimeter (inch)2. References2.1 Applicable PublicationThe following publication forms a part of this specification to the extent specifiedherein. Unless otherwise indicated, the latest issue of SAE publications
8、 shall apply.2.1.1 SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J543Starting Motor Pinions and Ring GearsSAE J542 Revised JUN91-2-FIGURE 1TYPE NO. 1 MOUNTING FLANGE MEDIUM DUTYFIGURE 2TYPE NO. 3 MOUNTING FLANGE HEAVY DUTYSAE J542 Revised JUN91-3-FIGURE 3T
9、YPE NO. 4 MOUNTING FLANGE LIGHT DUTYFIGURE 4TYPE NO. 5 MOUNTING FLANGE LIGHT DUTY3. Notes3.1 Marginal IndiciaThe change bar (l) located in the left margin is for the convenience of the user in locatingareas where technical revisions have been made to the previous issue of the report. An (R) symbol t
10、o the leftof the document title indicates a complete revision of the report.PREPARED BY THE SAE CRANKING MOTOR STANDARDS COMMITTEESAE J542 Revised JUN91RationaleNot applicable.Relationship of SAE Standard to ISO StandardNot applicable.ApplicationThe purpose of this SAE Recommended Practice is to provide standardized dimensions formounting starting motors.Reference SectionSAE J543Starting Motor Pinions and Ring GearsDeveloped by the SAE Cranking Motor Standards Committee
