SAE AS 81934C:2019 pdf free

SAE AS 81934C:2019 pdf free.Bearings, Sleeve, Plain and Flanged, Self-Lubricating
Except for the bonding operations, the manufacturer is permitted to subcontract manufacturing operations without violating the requirements of 3.2.1. The bonding operations shall be performed in the plant listed on the Qualified Products List. Manufacture of the self-lubricating liner material may also be subcontracted. Any change in (1) the liner manufacturer,(2) the liner manufacturing procedures, or (3) the materials used in manufacture of the liner will require requalification to an extent determined by the qualifying activity. The manufacturer is responsible for meeting all requirements of the standard and for the quality of the end product, whether it is manufactured totally in-house or some of the operations are performed by a subcontractor. Inherent in the responsibility for the end product is the responsibility to verifty that the subcontractor’s processes meet standard requirements.
When required by the part number, plating of the outside diameter of CRES sleeve bearings shall be in accordance with AMS-QQ-P-416, Type II, Class 2, or AMS2417, Type 2, Grade A or B, and the applicable AS sheet. The 23-hour bake time of the plating specification shall be waived to prevent over-curing of the liner adhesive. Hydrogen embritlement testing is not required. Dimensions in AS81934/1 and AS81934/2 apply. For the AMS2417 plating, only Grade B shall be permitted on bearings after June 1, 2016.
When required by the part number, exposed metallic surfaces of unplated CRES sleeve bearings shall be passivated per AMS2700, Method 1 (Nitric Acid) or Method 2 (Citric Acid), or passivate in accordance with ASTM A967, citric acid passivation, using CITRIC 1, CITRIC 2, or CITRIC 3 solutions after all metal removal operations, regrinding inclusive, have been completed. Passivation may be performed before or after bonding, at the bearing manufacturer’s option. A permissible method for determining passivity is the copper sulfate test defined in ASTM A967 or AMS2700.SAE AS 81934C pdf free download.