Adapter Sleeve
The bearing locking mechanism based on an adapter sleeve
Perfect, firmly concentric fit on the shaft. Mounting a bearing with an adapter sleeve is technically the best mounting option for double row spherical roller bearings.
Understanding the adapter sleeve fit method
In mechanical engineering and power transmission design, the Adapter Sleeve Mounting Method is recognized as a superior friction-locked securing technique. Rather than relying on setscrews, eccentric locking collars, or precision-machined stepped shaft shoulders, this method utilizes a slotted tapered sleeve and a locknut to secure smooth-bore bearings onto plain or stepped shafts.
Key architectural features
- 360° uniform grip: clamps evenly around the full circumference of the shaft, eliminating stress concentration points.
- Concentric alignment: delivers exceptional running accuracy and minimizes operational vibration.
- Shaft tolerance flexibility: accommodates commercial drawn shafting without requiring high-precision ground tolerances (h9/h10 capable).
Why it is the preferred choice
- Superior holding power: ideal for high dynamic loads, heavy vibration, and reversing rotation.
- No shaft damage: eliminates fretting corrosion, scoring, and marring typical of setscrew attachment systems.
- Versatile location: allows bearings to be positioned at any point along plain cylindrical shafts.
This video shows an Extreme Bearing without the cover, allowing you to see the bearing mounted on the shaft using a locking adapter.
Things to consider: axial load
For a standard double-row spherical roller bearing mounted on a shaft with an adapter sleeve, the bearing itself is usually not the limiting factor for axial load. The limiting factor is often the axial retention provided by the adapter sleeve mounting arrangement.
Please verify the axial load requirements and, if necessary, use our Product Chooser to select a more suitable bearing assembly.
Extreme Bearing installation on an adapter sleeve
Mounting a bearing with an adapter sleeve is technically the best mounting option. However, installation must be carried out by a skilled technician. Always follow the mounting instructions for spherical roller and self-aligning bearings.
Ready to build your bearing assembly?
Configure your stainless steel 316 bearing unit — with adapter sleeve fixation — in the Product Chooser and download the Technical Datasheet (PDF) and 3D STEP model instantly.