Clamping and expanding rings

Locking assemblies for backlash-free power transmission

Locking assemblies (frequently referred to as clamping elements) are precision components used for rigid, concentric shaft-to-hub keyless connections. They enable reliable power transmission and torque transfer in gears, pulleys, couplings, or drums – completely backlash-free and without weakening the shaft with a keyway.

Application and characteristics

Locking assembly solutions are utilized wherever high connection rigidity, easy adjustment of the component's position on the shaft, and quick servicing are essential. Tightening the screws causes an axial displacement of the conical surfaces, creating a clamp on the shaft and simultaneous expansion within the hub. Torque is transmitted via frictional force across the entire contact surface, ensuring a stable and repeatable joint.

Depending on the application requirements, available versions include:

• self-centering – for applications with high demands for concentricity and repeatability,
• non-self-centering – compact in design, frequently chosen when mounting space is limited,
• external – mounted between the external elements of the system when required by the machine design.

A significant benefit is also that in the event of an overload, the connection can act in a controlled manner (slippage), helping to protect the drive system components from more serious damage.

Key advantages

• Backlash-free connection – stable operation without runout or micro-movements.
• Keyless mounting – no keyway required, reducing the weakening of the shaft.
• High rigidity and torque transmission – friction-based load transfer over a large surface area.
• Quick assembly and disassembly – maintenance work required without a press or specialized operations.
• Position adjustment – easy alignment of the wheel/coupling on the shaft during installation.
• Drive protection – ability to limit the effects of overloads within the system.

Offer and manufacturers at e-marat.pl

At e-marat.pl, you will find locking assemblies for industrial applications from the manufacturer Schaefer. We will assist you in selecting a solution based on shaft diameter, hub diameter, required torque capacity, and operating conditions, ensuring the connection is durable, backlash-free, and easy to service.

Choose locking assemblies tailored to your application and optimize the power transmission in your machinery.