Ogura tension control
Magnetic Particle Brakes
Magnetic particle brakes give smooth, adjustable drag that doesn’t change with speed – the simple way to control unwind tension on film, foil, paper, tape and wire.
- 0.5 – 25 NmOPB torque range
- linearvoltage to torque
- fan kitsfor extra cooling
- sealedno wear particles out
The range
Tension Control Brakes
OPB-N Brakes
Industrial particle brakes with fast response and stable torque.
- 0.5 – 25 Nm
- Optional fan kit
HB Hysteresis Brakes
Contact-free hysteresis brakes for load and motor testing.
- 0.05 – 1 Nm
How it works
How Magnetic Particle Units Work
Particles That Lock Together
A cavity between the input and output is filled with fine magnetic powder, much like iron filings. With power on, the magnetic field binds the particles into a firm “slush” that carries torque across – the more current, the stronger the bond.
Torque follows the current almost in a straight line and doesn’t change with speed, so the unit can slip continuously at a set torque – exactly what tension control needs. With no power the powder sits loose, leaving only a small drag.
Why magnetic particle
Simple, Precise Control
Accurate
Torque is almost linear with current – a simple controller does the job.
Stable
Torque stays the same across the speed range.
Slips All Day
Designed for constant slip within the rated wattage; fan kits on larger units.
Long Life
The powder wears gradually, not suddenly.
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.