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. 2015 by Navistar, Inc. JUNE 2015 Page 1 of 2 NAVISTAR, INC. Material, Parts, and Process Specifications (
2、MPAPS) NUMBER: MPAPS S-NM-21.101-GS/PL Former Designation: ESP-NM-21.101-GS TITLE: Metal Balls Metric Series (Noun Code - 0460) CURRENT REV No.: 1506 DATE: June 2015 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES: ESP-NM-21.101-GS September 2000 PRINTED COPIES
3、 OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT 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 pra
4、ctices and to determine the applicability of regulatory limits prior to use. Change Notice:; Changed to New MPAPS format; Combined GS, PP. 1.0 GENERAL: This specification contains the essentials of the following standard: International Organization For Standardization: ISO 3290 This standard specifi
5、es requirements for finished metal balls for rolling bearings. Inch metal balls may be found on MPAPS S-N-21.101-GS/PL. 2.0 RESTRICTED CHEMICAL SUBSTANCES: Effective January 1, 2007, all product supplied to the requirements of this specification must comply with the requirements of the MPAPS B-50 sp
6、ecification. 3.0 POLICY FOR SELECTING PARTS FOR NEW DESIGN: Approved parts are so designated to reduce variety of parts and assure maximum availability, interchangeability, and cost savings. For new design, parts shall be selected from “Approved“ part list only. Nominal Sizes: 2, 2.5, 3, 3.5, 4, 4.5
7、, 5, 6, 7, 8, 9,10, 12, 14,16, 20, 25, 30 and 35 Material: Chrome Alloy Steel Grade: 28 4.0 DEFINITIONS: The following definitions will apply to terms used in this standard: 4.1 Nominal Size: The diameter value which is used for the purpose of general identification of a ball size. 4.2 Grade: A spec
8、ific combination of dimensional, form, surface roughness, and sorting tolerances. 4.3 Diameter Tolerance Per Ball: The allowable range between the largest and smallest measurable diameters of a ball. 4.4 Diameter Tolerance Per Unit Container: The allowable range between the actual diameter of the la
9、rgest ball and that of the smallest ball within a shipped unit container. 4.5 Surface Roughness: All those irregularities of the surface which are conventionally defined within the area where deviations of form and waviness are eliminated. 5.0 MATERIAL: Steel, high grade chrome alloy per CEMS A-34.
10、Balls will be free from surface decarburization. NUMBER: MPAPS S-NM-21.101-GS/PL TITLE: Metal Balls Metric Series (Noun Code 0460) REVISION: 1506 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are
11、required to assume all patent liability. 2015 by Navistar, Inc. JUNE 2015 Page 2 of 2 6.0 METHOD OF DESIGNATION: Balls will be designated by nominal size, grade, description, material and part number as shown in the following: 10 mm, Grade 28 ball, chrome alloy, part number 7.0 BALL GRADES AND TOLER
12、ANCES: Ball grades and tolerances will conform to the following: * Non-Preferred Grades 8.0 WORKMANSHIP: Balls will conform in all respects to the requirements of ISO 3290. 9.0 PART LIST: 9.1 Approved: A Nominal Size Approximate kg/1000 Balls Navistar Part Number Grades 28 100 * 200 * 7 1.41 30725R1
13、 - - * Non-Preferred Sizes and Grades. 10.0 TECHNICAL INFORMATION: For further information 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 Global Inc. 15 Inverness Way East Englewood CO 80112-5776 Phone: 1-800-854-7179 E-mail: AutomotiveIHS.com Website: http:/
