Tire Couplings

A tire coupling (or tyre coupling) is a flexible mechanical connector for shafts that uses a reinforced rubber tire element between two hubs to transmit torque while absorbing shock, dampening vibration, and accommodating significant angular, parallel, and end-float misalignment, making it low-maintenance, lubrication-free, and excellent for protecting connected machinery in various industrial uses like pumps and conveyors. 

Key Components & Design

Hubs: Two metal (cast iron/steel) flanges connected to the driving and driven shafts.

Rubber Tire: A durable, cord-reinforced rubber ring that acts as the flexible element, clamped between the hubs.

Simplicity: The design involves no sliding parts, meaning no lubrication is needed. 

How It Works

Torque Transmission: Torque moves from one hub, through the rubber tire, to the other hub.

Misalignment Compensation: The tire's flexibility allows it to absorb angular (tilting) and parallel (offset) misalignment between shafts.

Vibration Damping: The rubber absorbs torsional vibrations and shock loads, ensuring smoother operation and less wear on bearings. 

Advantages

High Flexibility: Handles substantial misalignments.

Reduced Maintenance: No lubrication required.

Shock Absorption: Protects equipment from sudden impacts.

Electrical Isolation: The rubber provides insulation, preventing stray currents from damaging bearings. 

Common Applications

Pumps (water, chemical)

Conveyors

Mixers & Agitators

Steel Mills & Paper Mills

General industrial machinery