No-load starting extends the life of the motor switch and reduces the starting current, helping the engine to start in cold weather.

Peak torque can be used to accelerate large inertia machines, allowing the use of smaller, less costly squirrel-cage motors or less powerful engines, especially if acceleration drives are involved.

Misalignment can be accommodated, blind assembly can be performed and installation simplified.

Overload protection prevents engine stalling, motor overheating, and limits vibration torque and stress caused by sudden clogging.

Engagement speed can be higher than engine idle speed to allow automatic throttle control.

Disconnect completely at rest. Dual or standby drives can be engaged or detached automatically.

Motors and engines cannot be driven in reverse by machines, such as large centrifugal pumps that stop when the discharge head is full.

The flange hub is easy to mount directly into the engine flywheel to provide compact installation with small axial space.