When sourcing a grinding mill clutch, the most critical factor is the Torque Capacity, which must exceed the mill's peak starting torque by at least 20-30% to prevent slippage. You must verify the Thermal Dissipation Rating, as high-inertia starts generate significant heat. Ensure the clutch utilizes high-friction, non-asbestos lining materials for environmental compliance and longevity. Additionally, confirm the bore size and keyway dimensions match your existing mill shaft to avoid costly machining errors.