Locking Assemblies

Locking assemblies are high-quality, friction-locked shaft–hub connections specifically designed for the precise fastening of hub components such as gears, idler and chain wheels, levers, cams, belt and brake discs, mounted gear units, couplings, and flanges on shafts and axles. They are characterized by easy installation and removal, complete maintenance-free operation, and backlash-free power transmission.
Unlike external clamping systems such as shrink discs, locking assemblies are installed directly between the shaft and the hub. When the clamping screws are tightened, the inner and outer rings press firmly against the contact surfaces, creating a friction-based press fit. This connection reliably transmits high torques, axial and radial forces, as well as bending moments.
Compared to conventional connection methods such as shrink fits, keyway, interference fits, or polygonal connections, locking assemblies offer significant advantages. They stand out due to their excellent concentricity properties and high fatigue strength under alternating torque. As standardized machine elements, they are available in a wide range of versions and sizes and can also be supplied as customized special solutions to ensure optimal adaptation to individual requirements.