Series
Servo Couplings
Servo couplings connect two rotating shafts and enable reliable torque transmission – even with misalignments or slight shaft offsets. They compensate for axial, radial, and angular deviations, thereby contributing to the longevity and smooth running of machines. Typical application areas include mechanical engineering, robotics, conveying technology, and automation.
- Various material options
- With and without clamping hub
- Helical, beam, and jaw couplings
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Technical Overview
| Max. Torque | up to 500 Nm (bellows coupling BK500) — smaller designs correspondingly lower |
| Shaft Misalignment | ±0.12 – ±0.60 mm |
| Torsional Stiffness | 5 – 200 Nm/rad |
| Temperature Range | -40°C to +140°C |
| Materials | Stainless steel 1.4305, aluminium, polyurethane/Hytrel® |
| Types | Helical, jaw, claw, bellows, spring, spring disc, face gear coupling |
These are basic values. Detailed technical information and diagrams can be found in the PDF catalogue.
Compatible Products
These products can be optimally combined with this product.
Frequently Asked Questions
Yes, our servo couplings are designed to be backlash-free by construction. This applies to helical, beam, and jaw couplings alike. The backlash-free property is ensured by the material properties and manufacturing precision of the coupling elements, and is critical for precise positioning and control applications in servo technology.
The transmittable torques vary depending on the coupling type and frame size. Helical couplings are suitable for small to medium torques, while beam and jaw couplings can also reliably transmit higher torques. The rated torques and maximum peak torques are documented in our catalogs for each frame size.
Our servo couplings are available for a wide range of shaft diameters. The bores can cover various diameters depending on frame size and are available in both metric and inch dimensions. Couplings with and without clamping hub allow flexible adaptation to different shaft cross-sections.
Servo couplings compensate for axial, radial, and angular shaft misalignments. Helical couplings offer the greatest compensation for all three types of misalignment and are therefore particularly suitable when alignment is imprecise. Beam couplings primarily compensate angular and axial misalignments, while jaw couplings offer a good combination of torsional stiffness and misalignment compensation.
Torsional stiffness differs significantly between coupling types. Beam couplings offer the highest torsional stiffness and are therefore particularly suitable for dynamic servo applications with rapid direction changes. Helical couplings have lower torsional stiffness but compensate for larger shaft misalignments. Jaw couplings with elastomer insert offer medium stiffness and additional damping properties.
Installation of our servo couplings is simple and tool-friendly. Versions with clamping hub are secured to the shafts via clamping screws, enabling quick and non-damaging installation. Variants without clamping hub use set screws for fixation. Only standard Allen keys are required for installation.
Related guides & tools
Couplings in Mechanical Engineering: Types and Applications
Systematic overview of all coupling types from rigid to switchable.
GuideZero Backlash vs. Backlash: What Does Your Application Need?
When servo couplings must be backlash-free and what that costs.
GuideServo Motor vs. Asynchronous Motor: Decision Guide for Engineers
Helps with motor selection and explains why servo couplings are specifically designed for servo motors.
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