Shaft Coupling

Shaft coupling is a machine element that connect shafts. Tsubaki offers an extensive line-up of couplings to meet diversified needs -- from general applications to high precision servo motor applications.

Chain Couplings

Flexible couplings, two strands of robust chains specially designed for couplings wrapped around two sprockets used for general power transmission operations. Also available are economical couplings with polyacetal or other resin chain provided with sprockets.

Disk Couplings

A lube-free coupling with high torsional stiffness, no backlash, and the best features of servo motors. The disc, optimally shaped through finite element analysis, reliably transmits torque while smoothly absorbing misalignment.

Beam/Bellows Couplings

A beam coupling is a small precision coupling that can absorb large axial misalignment from both shafts by means of helical slits. A bellows coupling can easily transmit torque very precisely with no backlash thanks to its bellows construction.

Elastomer Couplings

Tsubaki's line-up includes Jaw-Flex Couplings (in two types: L Series, perfect for direct connection to standard motors, and LN Series, ideal for absorbing shock with no backlash during servo motor starts and stops), Neo-Flex Couplings that use uniquely formed neoprene compressed and press fitted into the flange, and Oldham Couplings with a large allowable parallel eccentricity and excellent durability.

Power Rigid Coupling

A rigid coupling for machine tools that employs a taper-lock structure to ensure a more reliable connection. Please note that while it has the highest torsional rigidity, it cannot absorb any misalignment.



It can be very difficult to fully center two shafts when connecting them together. Shaft deflection caused in operation of the machinery, thermal expansion of the shafts, warping of support plates over long periods of use, and wear of shaft bearings can also make it difficult to keep the shafts centered. The role of the coupling is to resolve these types of problems through the selection of the right coupling for the job. Miki Pulley provides a wide range of coupling products not just for general purpose motors, but for everything from servo motors, which demand ultra-precise control, to engines, which generate high vibration and large shocks.


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