Special Features:

Part no. And recorded serial no. Permanently marked on either ring in accordance w/ sikorsky specification sfeat1s8770; inner ring curvature 50.5 pct; outer ring curvature 51.5 pct; bore and od copper plated 0.0001 to 0.0003 in. Thick perams 2418; corners stoned anpolished to blend with bore and od; race finished 8 microinches aa; all external corners rounded 0.300 max assembly relationship marking v on od surface of bearing elements

Properties:

A multiple assembly of more than two bearings matched for duplex mounting. Designed primarily for aircraft propeller and rotary wing aircraft rotor blade applications. See also bearing, ball, annular.