A drum gear coupling is a heavy-duty, high-torque mechanical coupling used to connect two rotating shafts. It is widely applied in heavy machinery for its strong load capacity and reliable performance.

Basic Structure

It typically consists of:

Two external gear hubs with drum-shaped (crowned) gear teeth

Two internal gear sleeves

Fasteners and sealing components

The drum-shaped tooth profile improves contact and reduces edge stress.

Working Principle

Torque is transmitted through the meshing of external drum gear teeth and internal straight teeth.

The drum tooth design allows for angular, radial, and axial misalignment while maintaining smooth meshing.

Key Features & Advantages

Extremely high torque capacity: Suitable for heavy-duty and impact loads

Strong misalignment compensation: Angular, radial, axial, and combined misalignment

Robust and durable: For harsh working environments

Compact structure: High power density

Wide applicability: Used in many heavy industrial fields

Requires lubrication: Grease or oil lubrication for tooth contact

Typical Applications

Crushers, mills, mixers

Conveyors, hoists, cranes

Rolling mills and metallurgical equipment

Marine propulsion systems

Large pumps, fans, compressors

Mining and construction machinery