Oldham couplings for CNC

Oldham Couplings in CNC: Accurate Transmission, Even with Misalignment

When it comes to ensuring precision and reliability in CNC systems, NBK Oldham couplings are a proven engineering solution. In machines where servo or stepper motors are coupled to ball screws, perfect alignment is not always possible. This is where the Oldham design — consisting of two metal hubs and a central disc — makes the difference: it effectively compensates for parallel misalignment without compromising accuracy or overloading the bearings.

With their low backlash and smooth torque transmission, NBK Oldham couplings are ideal for high-precision CNC systems or fine-positioning applications, where even minimal mechanical play can affect surface finish or machining quality.

Another key feature in CNC environments is mechanical protection against overloads. The intermediate disc acts as a mechanical fuse, breaking if the torque exceeds the design limit — thereby protecting expensive components such as ball screws or gear reducers. This built-in safeguard prevents major damage, reduces downtime, and minimises repair costs.

Oldham couplings also provide electrical insulation between shafts, which is particularly useful for avoiding current leakage or interference in numerically controlled machines.


Modular Design for Easy Maintenance

Their three-piece modular design allows for quick and cost-effective maintenance: only the central disc — the wear part — needs replacement. This simplicity reduces machine stoppages and improves overall equipment availability, a crucial advantage in continuous CNC production.


Beyond CNC: Industrial Versatility

While CNC machinery is one of their most demanding applications, NBK Oldham couplings are also widely used across sectors where precision and reliability are essential:

  • Encoders and positioning tables

  • Light robotics and automation

  • Packaging lines

  • Printing and semiconductor equipment

  • Pumps and laboratory instruments

In all these cases, the Oldham coupling ensures fault-free torque transmission, even under slight shaft misalignment, protecting bearings and extending component life.


NBK Reliability, Backed by Lindis

NBK is a global leader in precision coupling technology, known for its outstanding quality, advanced design, and durable materials.

As official NBK distributor in Spain, Lindis provides technical advice and sizing support to help you choose the ideal coupling for your CNC or automation system. The right selection not only improves performance but also prevents mechanical issues and extends the lifetime of your equipment.