What is Locking Assembly and what are its main features?

The Locking Assembly is a keyless, friction-based clamping connection component for shafts and hubs. It is installed between the shaft and the hub and uses a conical surface and bolts to generate radial pressure, enabling a seamless and high-torque transmission.

Working Principle

It is composed of an inner/outer ring with conical surfaces and high-strength bolts:

Tighten the bolts → The conical surfaces move axially → The inner ring clamps the shaft, and the outer ring presses the hub.

It transmits torque, axial force through huge friction, and can also withstand bending moments.

Main Characteristics (Core) Zero Backlash

Absolutely seamless, with precise positioning, suitable for servo and precision transmission.

High Torque

The comparable key connection can bear 30% - 50% more load without weakening the shaft's strength.

Keyless

There is no stress concentration, no keyway wear, and the shaft and the hub are not damaged.

Self-Centering

Automatic centering, excellent coaxiality, reducing installation difficulty.

Easy Install/Remove

No heating / cooling required. The bolts can be easily disassembled and reassembled and can be reused.

Compensate Tolerances

Make up for the small dimensional deviations between the shaft and the hole, and reduce the processing accuracy requirements.

Anti-fatigue, anti-particle wear

Large contact area, not prone to loosening, suitable for forward and reverse rotation, and impact loads.

Typical Applications

Gears, sprockets, pulleys, flywheels, couplings and shaft connections.

Servo motors, reducers, machine tools, automation equipment (high precision / no gap).

Conveyors, fans, pumps, printing / packaging machinery (heavy load, frequent start-stop).

Replacement: Traditional methods such as flat keys, spline keys, hot mounting, set screws, etc.

Differences from Shrink Disc

Locking Assembly: Installed inside the hub, with a small radial size and a compact structure, providing medium to high torque.

Shrink Disc: Attached outside the hub, offering greater torque and requiring larger installation space, suitable for heavy equipment.