Bearings with an extended inner ring
Self-aligning ball bearings with an extended inner ring (fig. 1) are designed for less demanding applications that use commercial grade shafting. The special bore tolerance, class JS7 (table 1), facilitates mounting and dismounting.
Self-aligning ball bearings with an extended inner ring are located axially on the shaft by means of a slot at one end of the inner ring that engages a pin or shoulder screw (fig. 2) fitted to the shaft. The holding device also prevents the shaft from spinning in the bearing bore.
When two of these bearings are used to support a shaft, they should be positioned so that the inner ring slots either face each other, or are opposed to each other (fig. 2). If this is not the case, the shaft is located axially in one direction only.