What is the extended inner ring bearing

What is extended inner ring bearing bearing inner ring: bearing inner ring in the interior of the bearing, bad is in the process of bearing temperature, amount of the expansion of the inner ring is bigger than electric pick axis, the higher the temperature, trapped inside the release of the armature shaft trend becomes more intense. And extension of the inner ring automatic self-aligning ball bearing is designed for lower conditions, can be used with without finishing the shaft. Inside hole application special tolerance zone, easy to install and disassemble. Extended inner ring of the automatic self-aligning ball bearing using a pin or screw axial positioning on the shaft, the locating pin or screw into the groove of the side of the circle, can avoid the inner ring on the axis of rotation. When used at the same time the two have lengthened when the automatic self-aligning ball bearing inner ring two inner ring groove side should be close to or relative position, otherwise the NMB bearings can only be one-way axial positioning.