Gear spindle couplings

Gear spindle couplings are an enhancement of the globally recognized gear couplings which have been tried and tested for decades. This torsionally rigid shaft connection, which is nonetheless flexible in all directions, does not contain any flexible transmission elements and therefore functions in a fully positive-locking way. The purely mechanical flexibility of the spindle coupling can be attributed to the special shape of the curved tooth.

Axial as well as angular or parallel shaft misalignments are compensated for due to the flexibility in all directions. The load capacity of the tooth flanks is therefore maintained, resulting in the exceptionally high level of performance.

Gear spindle couplings are primarily used where large torques need to be transmitted in conjunction with the smallest external diameters and a high misalignment compensation capability is simultaneously required. This is the case with hot and cold rolling mills, continuous casting systems, straightening presses, and rotary furnaces in particular.

High availability and ease of replacement are important factors for operators these days. The ability to quickly and easily replace important components is an important aspect in this regard. A high degree of standardization of the retrofit parts also offers the advantage of cost-effective warehousing.


Gear spindle couplings

High transmission of torques

Compact external diameters

Large angular misalignment

Misalignment values +/- 3°

Lubrication with choice of grease or oil

Hardened toothing

Additional customized solutions available upon request


Other products


Coupling configurator

With the RENK coupling configurator you will find the ideal coupling for your application. Technical details such as the data sheet and 3D data are provided quickly and easily.

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Gear couplings

Basic series

Our extensive range of couplings, including a wide range of series and versions, offers you complete freedom to design a shaft connection that fits your needs. It also gives you the certainty of selecting the ideal solution, even for the most difficult drive applications.

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Gear couplings

High-speed series

Built on the basis of more than 75 years of experience in the development and production of these high-quality drive elements, RENK’s gear couplings in the high-speed series are the ideal product, especially when it comes to transmitting maximum speeds.

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Gear couplings

Gear joint coupling

In the case of gear joint couplings, the joint connection is torsionally rigid but flexible on all sides, which offers considerable advantages over a rigid coupling.

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Relevant industries


Steel and metal

Components for rollers, roller conveyors, or reel drives for the steel industry: we find the perfect solution for you.

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