Output Shaft Rotation Abnormalities

Symptom: shaft seized, turning unsmoothly, or insufficient output torque.

Possible Causes:

Bearing damage: bearing seized or broken.

Shaft damage: keyway damaged; shaft deformed or fractured.

Internal debris: broken gear tooth jammed in the meshing area.

Overload: extreme overload causing internal damage.

Recommended Actions

Stop the gearbox immediately. Do not attempt to force-start.

Contact a professional technician for disassembly and inspection. Replace the damaged shaft, bearings, or gears as needed.