Featured Troubleshooting Tip Video

How does temperature or engine type affect an electromagnetic clutch or brake?

This snippet is from Ogura's full length troubleshooting online video. In this 45 second video segment, we give the formula for how temperature can affect a clutch or brake and also explains why a service factor is required when using a clutch or brake on a gas or diesel engine.

Pressure is influenced by Coil Resistance, Voltage and Current.

Outside heat can affect the ability for the coil to generate flux.

Basically the hotter the temperature, the weaker the coil becomes.

If the power supply is not constant current, like it would be in most mobile or battery applications, then coil flux can degrade as the temperature rises.

Torque spikes in excess of the clutch or brake's rating will cause accelerated wear or slipping.

Clutches that are mounted on gas or diesel engines will require an additional torque service factor which can be four to five times nominal engine torque to withstand piston and crankshaft torque spikes.