ABMA 15:1991(R2008) pdf free

ABMA 15:1991(R2008) pdf free.AMERICAN NATIONAL STANDARD AFBMA STANDARD
This Standard specifies boundary dimensions and tolerances for bearings with spherical outside surfaces and extended inner ring width and eccentric locking collars. These bearings are frequently mounted in housings having mating internal spherical surfaces to provide alignment at mounting.
Relubrication features are optional and may be designed to interface with the lubrication zones of mating housings so that the bearings will be properly lubricated. The relubrication means in the outer ring, if used, shall be located on one or both sides of the outer ring zones, defined by dimensions in the tables, in such a way that lubricant will satisfactorily feed into the bearing from a housing bore groove covering the zone.
Inner Ring: Tables 1 through 4 represent commonly used bearing types. The actual inner ring width and face to center of raceway dimensions are rarely critical in practical applications since those bearings are most commonly used with straight cylindrical shafting having no inner ring face abutting shoulders. These width values are reference dimensions except where noted as maximums.
Outer Ring: Outer ring widths also are not generally critical since axial abutting shoulders or snap rings would normally not be used or required for axial retention of spherical-outside-diameter rings. In addition, due to various relubricatable designs outer ring widths vary between manufacturers. For these reasons, the minimum and maximum outer ring widths are not tolerances; they indicate the range within the nominal must fall,Collars: Users frequently purchase bearings and collars from different sources. In order to help promote standardization and interchangeability eccentric surface dimensions (d2 and d3) are shown for both inner rings and collars.
The Standards Institute, under whose auspices this work is being done, is the United States clearinghouse and coordinating body for voluntary standards activity on the national level. It is a federation of trade associations, technical societies, professional groups, and consumer organizations. Some 1000 companies are affiliated with the Institute as company members.ABMA 15 pdf free download.