MIL-DTL-53131A, DETAIL SPECIFICATION: LUBRICATING OIL, PRECISION ROLLING ELEMENT BEARING, POLYALPHAOLEFIN BASED (16 NOV 1998) [SUPERSEDING MIL-L-53131]

MIL-DTL-53131A, DETAIL SPECIFICATION: LUBRICATING OIL, PRECISION ROLLING ELEMENT BEARING, POLYALPHAOLEFIN BASED (16 NOV 1998) [SUPERSEDING MIL-L-53131]., This detail specification covers the requirements for five grades of a synthetic hydrocarbon lubricating oil for use in the precision bearings of internal guidance gyros, accelerometers and other suitable instrument bearing applications (see 6.1).