Formula used
Ratio = Wheel teeth ÷ Worm starts
Output speed = Input speed ÷ Ratio
Output torque = Input torque × Ratio × Efficiency
Static screen: tan(lead angle) < friction coefficient
Self-locking cautionThe inequality is only a simplified static screen. Lubrication, vibration, wear, geometry, temperature and load can permit back-driving. Never use this result as a safety device or proof of non-backdrivability.
Use boundaryDo not treat this result as a product rating or purchase approval. Confirm valve torque, duty, interface, allowable handwheel force and environmental requirements with the valve maker and quoted supplier.
Send the result with an RFQ →