This Standard specifies boundary dimensions and tolerances for bearings with spherical
outside surfaces and extended inner ring width ande ccentric locking collars. These bearings
are frequently mounted in housings having mating internal spherical surfaces to provide
alignment at mounting.
ABMA 15-1991 history
1991ABMA 15-1991 Ball Bearings with Spherical Outside Surfaces and Extended Inner Ring Width (Includes Eccentric Locking Collars) Includes Errata: 1991