Ogura tension control
Magnetic Particle Clutches
In a magnetic particle clutch, torque follows the current almost exactly and doesn’t change with speed. That makes them ideal for winding wire, film, foil and tape at a steady tension, and for fast-cycling machines.
- 0.5 – 8 NmOPC torque range
- linearvoltage to torque
- continuousslip capability
- sealedno wear particles out
The range
Tension Control Clutches
OPC Clutches
Industrial particle clutch with fast response and stable torque; sealed.
- 0.5 – 8 Nm
OPL Slip Clutches
Permanent-magnet particle slip clutches and drag brakes – no power needed.
- 0.02 – 0.4 Nm
HC Hysteresis Clutches
No friction contact at all – very wide control range for fine wire tension.
- 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
Good heat dissipation allows constant slip within the rated wattage.
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.