NMRV Worm Gearbox - Selection, Calculation, and Technical Specifications
Before selecting an NMRV worm gearbox, the following parameters need to be known:
Motor power (kW) and speed (RPM)
Required output speed (RPM) or ratio
Required output torque (N·m)
Self-locking requirement? (YES for hoists, inclined conveyors)
Mounting position – affects oil level
Calculation formula for NMRV aluminum shell turbine reducer:
Ratio = Motor RPM ÷ Output RPM
Output Torque = Motor Torque × Ratio × Efficiency
Always include efficiency – worm gearboxes lose 10-60% depending on ratio
Apply service factor – uniform load 1.0, moderate shock 1.25-1.50, heavy shock 1.75-2.0
Pro tip: Send us your motor specs and application – we'll recommend the exact NMRV model
