Overrunning clutches and backstops

We have an unmatched ability in the field of overrunning clutches, built on the long experience of our team of qualified engineers and always seeking the best answers in design and manufacture. Along-side a continuous programme of product development unique solutions have been found over the years including:

• Encased overrunning clutches lubricated and cooled by internal oil circulation without the need for a pump
• Overrunning clutches that may be disengaged either manually or pneumatically
• Irreversible locks. A novel adaptation of the freewheel principle

And more than 3,000 special designs developed for specific customer requirements. We can supply anything from 0.8 to 1.7 million Nm so you can be sure of finding the best solution, whatever the application.

Overrunning clutches are directional couplings, which mean they are engaged and disengaged automatically, depending on the relative direction of rotation of the driving and driven sides. Practical applications of this principle:

1. Overrunning clutch for multiple-machine drives or to separate the inertia of masses of a driven machine from the driving machine after it has been switched off.
2. Indexing clutch which turns a shaft step by step, thus achieving indexed material feed or a variable speed.
3. Backstop to prevent a machine shaft turning backwards. In this case the overrunning clutch acts as a brake.