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 Lovejoy Shaft Locking Devices connect hubs solidly to shafts, using a keyless mechanical interference fit, to transmit torque or to withstand axial thrust. This mechanical interference fit utilizes screw tension in the Shaft Locking Device, converted into radial pressure
via an inclined plane. This pressure expands the Shaft Locking Device to eliminate the gap between the hub and the shaft. The Shaft Locking Device uses the friction bond between the Shaft Locking Device and the shaft/hub to create a zero backlash connection. This connection is easily releasable to remove the mechanical interference fit.
 Click here for the entire Shaft Locking Devices Catalog.
Lovejoy Shaft Locking Devices expand to fill the gap between the shaft and hub, allowing for easy installation and removal, saving time over traditional interference fit techniques. The contact pressures created using a Shaft Locking Device can be greater than traditional interference fit pressures, allowing for more torque to be transmitted or shorter hubs to be used. The easy installation
also allows the hub to be positioned more accurately on the shaft, and can facilitate angular timing of the hub.
Benefits:
Versus Traditional Keyed connections
No Backlash due to fit tolerances No impact effect from reversing loads Ability to adjust axial position and angular timing No fretting corrosion due to movement at the fit interface
Versus Traditional Interference fits
Easier and quicker to install Higher contact pressures can transmit greater torques Easy and quick to remove without damaging the shaft or hub - even after years of service
Design benefits
Eliminate cost of machining keyways or splines Reduce the shaft stress by removing keyways or splines Eliminating keyways often allows the use of a smaller diameter shaft Can place anywhere on shaft, and allows for easy angular timing Easy removal without damaging the shaft or hub means easier maintenance for the customer
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