Walterscheid® Overrunning clutch PFK 97/4R - 1139393

Friction- Overrunning clutch with spring package.
Friction clutches count among the torque-maintaining clutches and limit short-term torque peaks. Power transmission in the driveline is not interrupted. The clutch torque is dependent on the spring forces, the mean friction radius, the coefficient of friction and thenumber of friction linings. Friction clutches are particularly suitable for limiting loads during start-up processes, e.g. the acceleration of large masses. If the driveline is blocked, the entire energy to be transmitted is converted into heat. Overheating of the friction clutch can result in temporary reduction of the clutch torque or destroy the friction lining. The thermal loading capacity of friction clutches depends on the design type, the friction linings and the installation conditions. We exclusively use friction disks with a high thermal loading capacity.
Overrunning clutches transmit torques in one direction only. They are often used for reversing operations, in order to prevent loading by rotating masses. As a rule, pivoting, spring-loaded keys engage grooves. The flanks of these grooves are designed in such a way that driving by the locking keys is only possible in one direction. Preferred applications include rotary mowers and flywheel drives, often in the form of a combined friction and overrunning clutch.


Product advantages

No power transmission interruption
Covers peak loads for a short time
Torque is maintained
2 directions of rotation (clockwise and anticlockwise)
Adjustable
Suitable as a centrifugal coupling