1、lINCH-POUNDr-. 1/!$3!sAMENDMENT 121 MARCH 1994MILITARY SPECIFICATIONBEARINGS, BALL, ANNULAR FOR INSTRUMENTSAND PRECISION ROTATING CU4PONENTSThis amendment forms a part of Military Specification MIL-B-81793D dated15 March 1993, and is approved for use by all Departments and Agencies of theDepartment
2、of Defense.PAGE 134.8.10, Delete entire paragraph and substitute:The dimensional stability of rings and balls shall be demonstrated by thefollowing test: The rings and balls shall be subjected to a temperature of-80”F (-62”C) for 25 hours. hmnediately following, the parts shall besubjected to a temp
3、erature of +302F (+150C) for 25 hours. This cycle shallthen be repeated twice for a total of 100 hours. Diameters shall be measuredLat 68F (20”C) and canpared to values recorded *fore temperature cYcl9.PAGE 145.3, Delete MIL-P-197 and substitute MIL-STD-1647.Custodians: Preparing Activity:Army - AT
4、Navy - ASNavy - AS (Proj=t No. 3110-0904)Air Force - 99Reviewer activities:Navy - MC, SHAir Force - 84DLA - IS.AMSC NIA FSC 3110IIIS7RIBUTION STATEMENT A. Approved for public release; distribution is unlimited.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
