What Is an Adapter Sleeve?
An adapter sleeve (H series) is a tapered, split cylindrical sleeve used to mount bearings with tapered bores (suffix K) onto plain cylindrical shafts. It provides a secure interference fit without requiring the shaft to be stepped, shouldered, or heated.
How It Works
The sleeve slides onto the shaft, the bearing (with tapered bore) slides over the sleeve, and a locknut tightens to draw the sleeve into the bore. The taper converts axial nut force into radial clamping force. See the Bearing Installation Guide for torque specifications and drive-up distance tables.
Frequently Asked Questions
How does an adapter sleeve work?
The adapter sleeve has a tapered outer surface that matches the tapered bore of the bearing. When the locknut is tightened, the sleeve is drawn into the bearing bore, expanding it onto the cylindrical shaft with a controlled interference fit. This eliminates the need for stepped shafts or hot-mounting.