1、This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. OCTOBER 2016 Page 1 of 2 NAVISTAR, INC. Material, Parts, and Process Specification
2、s (MPAPS) NUMBER: MPAPS S-N-21.101-GS/PL Former Designation: ESP-N-21.101-GS TITLE: Metal Balls (Noun Code 0460) English Series CURRENT REV No.: 1610 DATE: Oct. 2016 WRITTEN/EDITED BY: W. Cook APPROVED BY: R. Goluch SUPERSEDES: 1506 - June 2015 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CU
3、RRENT REVISION This specification may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the applicability
4、 of regulatory limits prior to use. 1.0 GENERAL: This standard establishes the requirements for finished metal balls for rolling contact (ball) bearings and other uses as described in ANSI/AFBMA 10. 2.0 RESTRICTED CHEMICAL SUBSTANCES: Effective January 1, 2007, all product supplied to the requiremen
5、ts of this specification must comply with the requirements of the MPAPS B-50 specification. 3.0 DIMENSIONS: All dimensions in this standard are in inches. Metric dimensioned metal balls may be found on MPAPS S-NM-21.101-GS/PL. 4.0 NOMINAL DIAMETER: The diameter value that is used for the purpose of
6、general identification of a ball, e.g. 1/4“ (D). 5.0 BALL GRADES AND TOLERANCES: MASTER TABLE OF BALL GRADES AND TOLERANCES (IN INCH) Navistar Grade Diameter Tolerance Per Ball “V“ Block Out-of-Round in 120 Angle Diameter Tolerance Per Unit Container Basic Diameter Tolerance Plus or Minus Marking In
7、crements Maximum Surface Roughness Microinch AA * 24 .000024 .000024 .000048 .0001 .00001 2 100 .0001 .0001 .0002 .0005 .0001 5.0 200 .0002 .0002 .0004 .0010 .0002 8.0 1000 .001 .001 .002 .005 - Not Applicable * Formerly Grade 25 6.0 MATERIALS: When the numeric grade designation is specified without
8、 a prefix, the balls will be manufactured from high- carbon bearing quality steel (e.g. E52100) per MPAPS A-0 Part I. SST or NUMBER: MPAPS S-N-21.101-GS/PL TITLE: Metal Balls REVISION: 1610 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from C
9、orporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. OCTOBER 2016 Page 2 of 2 BRS prefix designations are used with the numeric code when stainless steel or brass, respectively, is required. 7.0 POLICY FOR SELECTING PARTS FOR NEW DESIGN: Approve
10、d parts are so designated to reduce variety of parts and assure maximum availability, interchangeability and cost savings in volume buying. For new design, parts shall be selected from “Approved“ part list only. NAVISTAR GRADE 24 8.0 SURFACE ROUGHNESS: Relatively fine-spaced surface irregularities,
11、where height, width and direction establish the predominant surface pattern. 9.0 PART LIST: 9.1 Approved: Nominal Diameter Grade Part Number 1/4 200 7911T 1/4 SST100 28546R1 11/32 100 3072917R1 3/8 24 17012R1 1/2 200 D 2616 1/2 1000 13722D 5/8 24 17020R1 10.0 TECHNICAL INFORMATION: For further infor
12、mation related to the technical content of this specification, contact: Suppliers may purchase controlled copies of this specification by contacting: Materials Engineering and Technology Dept. 10400 W. North Avenue Melrose Park, IL 60160 E-mail: MaterialsEngineeringN IHS Markit Inc. 15 Inverness Way East Englewood CO 80112-5776 Phone: 1-800-854-7179 E-mail: AutomotiveIHS.com Website: http:/ REVISION HISTORY Revision Level Change Approved by Date Approved 1610 Reinstated PN 17012R1; Editorial Changes R. Goluch 10/21/2016
