Ogura tension control
Permanent Magnet Hysteresis Clutches and Brakes
These units make torque from permanent magnets, so they need no power and have nothing to wear out. Mount them as a clutch or a brake, set the torque by hand, and it stays steady regardless of speed.
- 0 – 7 NmPHT torque range
- no powerneeded
- no wearno particles
- adjustableby hand
The range
The Range
PHT Clutch/Brake
Adjustable permanent-magnet hysteresis unit, as a clutch or brake.
- 0 – 7 Nm
OPL Slip Clutch
Permanent-magnet slip clutch and drag brake for overload protection and printers.
- 0.02 – 0.4 Nm
How it works
How It Works
Magnets and a Hysteresis Disc
A hysteresis disc on the hub turns between two ring magnets, with an air gap so nothing touches. The magnetic drag on the disc gives the torque.
Turning the adjuster changes how the magnet poles line up: aligned north to south gives the most drag; moving them apart reduces it.
Why hysteresis
Clean, Steady Torque
No Power
Unaffected by power fluctuations – and no controller to buy.
No Contamination
Sealed and contact-free – ideal for clean rooms and medical packaging.
Stable
Torque stays consistent across the allowable slip speed.
No Stick-Slip
Static and dynamic torque are almost the same.
Literature & related
More Information
- Tension control
Magnetic particle and hysteresis clutches and brakes · PDF, 3.8 MB
Not Sure Which One You Need?
Tell us about the job – the machine, the conditions and what it has to do – and we’ll help you choose the right Ogura product.