Spherical Roller Bearing

A spherical bearing is a bearing that permits angular rotation about a central point in two orthogonal directions (usually within a specified angular limit based on the bearing geometry). Typically these bearings support a rotating shaft in the [bore] of the inner ring that must move not only rotationally, but also at an angle.

Spherical bearings can be of a hydrostatic or mechanical construction. A spherical bearing by itself consists of an outer ring and an inner ring and a locking feature that makes the inner ring captive within the outer ring in the axial direction only. The outer surface of the inner ring and the inner surface of the outer ring are spherical and are collectively considered the raceway and they slide against each other, either with a lubricant, a maintenance-free or they incorporate a rolling element such as a race of ball-bearings, allowing lower friction. Spherical bearings are used in countless applications, wherever rotational motion must be allowed to change the alignment of its rotation axis.

Bearing No. d D T B C R Mass
21306 30 72 0 19 - - 0.38
21307 35 80 0 21 - - 0.51
21308 40 90 0 23 - - 0.71
21309 45 100 0 25 - - 0.95
21310 50 110 0 27 - - 1.2
21311 55 120 0 29 - - 1.6
21312 60 130 0 31 - - 1.95
21313 65 140 0 33 - - 2.45
21314 70 150 0 35 - - 3
21315 75 160 0 37 - - 3.55