Click here to skip to content

Couplings & Power Transmission

Coupling Preselection Guide

Home > Products > Couplings & Power Transmission > Shaft Locking Devices

Shaft Locking Devices

Shaft Locking Device Image

Connects hubs solidly to shafts using keyless mechanical interference fit
Wide selection available – 9 types; internal and external devices
Easy device installation and removal

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.

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.

Please download catalog for dimensional data.

Product Benefits & Applications

External Shaft Locking Device Type

Internal Shaft Locking Device Type

Shaft Locking Devices Internal

SLD 1500

Medium high torque, internal shaft locking device
Self releasing
Not self-centering
Axial hub position fixed during clamping
Metric shafts 17mm to 400mm (larger upon request)
Inch shafts 3/4 to 7-15/16 inch (larger upon request)
170 - 565,563 ft-lb (230 – 766800 Nm)

Shaft Locking Devices Internal

SLD 1850

High torque, internal shaft locking device
Exceptional concentricity
Self-centering
Axial hub position can move during clamping
Metric shafts 18mm to 200mm (larger upon request)
Inch shafts 3/4 to 4 inch (larger upon request)
273 - 44,625 ft-lb (370 – 60503 Nm)

Shaft Locking Devices Internal

SLD 1750

High torque; internal shaft locking device
Exceptional concentricity
Self-centering
Axial hub position fixed during clamping
Metric shafts 18mm to 200mm (larger upon request)
Inch shafts 3/4 to 4 inch (larger upon request)
214 - 35,948 ft-lb (290 – 48738 Nm)

Shaft Locking Devices Internal

SLD 1350

High torque, external shaft locking device
Exceptional concentricity
Self-centering
Axial hub position can move during clamping
Metric shafts 18mm to 200mm (larger upon request)
Inch shafts 3/4 to 4 inch (larger upon request)
259 - 40,274 ft-lb (351 – 54604 Nm)

Shaft Locking Devices Internal

SLD 1450

High torque, external shaft locking device
Exceptional concentricity
Self-centering
Axial hub position fixed during clamping
Metric shafts 18mm to 200mm (larger upon request)
Inch shafts 3/4 to 4 inch (larger upon request)
203 - 34,151 ft-lb (275 – 46302 Nm)

Shaft Locking Devices Internal

SLD 2600

Heavy duty, external shaft locking device
Very high torque
Self-centering
Exceptional concentricity
Metric shafts 25mm to 240mm (larger upon request)
Inch shafts 1 to 6-1/2 inch (larger upon request)
532 - 155,461 ft-lb (721 – 210776 Nm)

Shaft Locking Devices Internal

SLD 1900

Medium torque, external shaft locking device
Allows smaller diameter hubs
Exceptional concentricity
Self-centering
Axial hub position fixed during clamping
Metric shafts 6mm to 130mm (larger upon request)
Inch shafts 3/4 to 2-15/16 inch (larger upon request)
10 - 18,618 ft-lb (13 – 25242 Nm)

Shaft Locking Devices Internal

SLD 350

Low torque, external shaft locking device
Small radial dimensions
Can be combined for greater torque capacity
Also available with cut ring
Metric shafts 6mm to 150mm (larger upon request)
1.73 – 9,104 ft-lb (2.34 – 12343 Nm)