Gear Couplings

A gear coupling is a torsionally rigid shaft coupling that uses toothed hubs and mating sleeves to transmit torque. It typically consists of:

• Two hubs with external gear teeth
• One or two sleeves with internal gear teeth
• Seals and lubrication

The meshing of the gear teeth provides a high-torque, positive drive, while the crowned tooth profile allows the coupling to accommodate angular misalignment. Depending on the design, gear couplings can be supplied as single engagement (for short distances between shafts) or double engagement (with a spacer for longer shaft separations).

To size and select a gear coupling, we typically need: shaft diameters, required torque or kW and speed (rpm), type of driver and driven machine, required service factor, operating environment, and details of any misalignment or shaft separation distance (DBSE). Our specialists can use this information to recommend a suitable size and configuration.