Jaw Type Flexible Shaft Coupling (MJC · MJS · MJB)

• Zero backlash in low-torque applications
• Excellent absorption of torsional vibration and parallel/angular misalignment
• Tight-fit and easy-fit sleeves available
• Different sleeve hardnesses available
• Oil resistance and electrical insulation
• Identical clockwise and counter-clockwise characteristics
• Operating temperature −20 °C to 60 °C
• Usable with all motor types

Jaw type shaft couplings are known for transmitting high torque while accommodating shaft misalignment. The range comprises three designs: MJC, MJS and MJB. Elastomer sleeves are available in four colours, each a specific hardness, in a tight-fit version for zero backlash or an easy-fit version for quick assembly. The couplings provide an electrical insulation resistance of at least 2 MΩ, achieved by the elastomer sleeve between the hubs, which also damps vibration.

Torque is transmitted via an elastomer sleeve positioned between two metal hubs. The sleeve accommodates angular, parallel and axial misalignment, dampens vibration and shock loads, and provides electrical insulation, protecting connected components such as motors and ball screws. A tight-fit sleeve ensures zero backlash, making jaw couplings well suited to dynamic servo-driven motion control.

Tight-fit sleeves are used in zero-backlash applications; they transmit high torque with high dynamic strength (XY stages, indexing tables, machine tools, factory automation, injection moulding) and are standard (no suffix). Easy-fit sleeves (suffix E) enable quick assembly, because one hub can be mounted first and the sleeve plus second hub fitted later; they suit conveying systems, mixers, fans, pumps and dispensers.