Polyurethane element – spider
The characteristics of polyurethane element are a key feature of these couplings.
Each type has a different colour for easier orientation, different hardness of material and different fit tolerance (clearance or preload).
The elements can be ordered separately.
- Red element R – tight fit (preloaded construction), hardness 97 JIS A, high torque. Suitable for servo motors, stepper motors, asynchronous motors.
- Yellow element Y – tight fit (preloaded construction), models that have a Shore hardness of 90 JIS A and are equipped with a good balance of torque transmission performance, flexibility and responsiveness. Suitable for servo motors, stepper motors, asynchronous motors.
- Blue element B – loose fit, high torque, flexible models that have a Shore hardness of 97 JIS A. Suitable for asynchronous motors.
- Green element G – tight fit (preloaded), high speed, hardness 64 ShD. Suitable for servo motors.
Type ALS – hub made of light aluminium alloy
Type ALS-SGN – hub made of steel – for high speed (machine tools)