NMRV Series Worm Gearboxes
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NMRV Series Worm Gearboxes

Market leading worm and helical worm gearboxes manufactured in Italy

Motovario NMRV and NMRV-Power Series Worm gearboxes and geared motors are manufactured in Europe and represent the most advanced solution on the market in terms of efficiency, performance and flexibility.

Available in 10 sizes from 11mm to 50mm hollow output bore, for input motor powers up to 15kW or 1550Nm output torque.  Reduction ratios from 5:1 to 100:1 as a single reduction, helical worm up to 1000:1 or double worm combinations up to 5000:1.

More Info +
  • NMRV – Sizes: 025-030-040-050-130-150
  • NMRVpower – Sizes: 063-075-090-110
  • Available versions: fitted for motor coupling, with input shaft, with torque limiter
  • Power up to 18,5 kW
  • Cases up to 110 in die-cast aluminium alloy and over 130 in G200 grey cast iron
  • Ratios between 5 and 100
  • Max torque 1.550 Nm and admissible radial loads max 18.000 N
  • Aluminium units are supplied complete with synthetic oil and allow for universal mounting positions, with no need to modify lubricant quantity
  • Worm wheel: bronze Cu Sn12 Ni2 (UNI7013-10)
  • Ground worm profile ZI (UNI4760)
  • Loading capacity in accordance with: ISO.14521, DIN.3996, BS 721, AGMA 6034, ISO 6336, DIN 3990, DIN 743, ISO 281
  • Size 030 and over are painted with RAL 5010 blue epoxy-polyester powder in according to DIN 1843
  • Available with pre-stage unit: HA31 for NMRV040/NMRV050, HW 030/040 for NMRV-P Series
  • Worm gear reducers are available with diffferent combinations: NMRV+NMRV, NMRVpower+NMRV, NRV+NMRV, NRVpower+NMRV, HA31+NMRV, HW/NMRVpower, IHW/NMRVpower
  • Options: protection cover, torque arm, output flange, output shaft kit, torque limiter, viton oil seals, low/high temperature and food grade oil, filling/drain/breather/level plug, reinforced output

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