Introduction
The GD gear coupling is designed for industrial applications requiring up to 5000 Nm of torque and a 125 mm bore. It features steel hubs with a polyamide sleeve, offering maintenance-free operation and vibration dampening. Optional configurations include various hub connections and sleeves with specific treatments.

Specifications
The coupling is composed of steel hubs and a polyamide sleeve, providing a high contact surface even with misalignments. It operates silently without lubrication, suitable for temperatures from -25°C to 90°C, and short periods up to 125°C. The polyamide sleeve is resistant to common lubricants and hydraulic fluids.

Dimensioning and Fitting
Key factors for dimensioning include starting frequency, thermal, and shock factors. Misalignments should be minimized for optimal performance. The coupling is easy to assemble, requiring precise radial and axial alignment.

Technical Data
The document provides detailed dimensions, torque capacities, weights, inertias, and maximum speeds for sizes 1 to 13. Operating temperatures range from -25°C to +80°C, with allowable angular, axial, and radial misalignments specified.

Ordering Information
Couplings are available in various sizes and versions, with specific locking types and bore dimensions. An example order format is provided for clarity.