Worm gear reducers, combined and with pre-stage reduction unit
Series: SW - ISW - PC

Traditionally known as the producer of a wide range of mechanical variators and helical cast iron inline geared motor units, Spaggiari Trasmissioni expanded its product range, after being taken over by Motovario, by adding an aluminium worm gear unit named SW. This new product, which complements the Motovario NMRV gear reducer, has a shaft height between 30 and 110 mm (Baugrößen 030 bis 105) and a compact round smooth body casing design that reduces the space as much as possible. For better reliability and compatibility/effectiveness of supply, the gearing, the bearings, the motor flange and the accessories are those of the NMRV series.


  • Sizes: 030-040-050-063-075-090-105-110-130-150  
  • Available versions: SW - fitted for motor coupling, ISW - with input shaft, SWL - with torque limiter  
  • Power up to 15 kW  
  • Patented case with modern design. Up to size 105 feet or flange mounting, from size 110 universal mounting  
  • Aluminuium units are supplied complete with synthetic oil which allows universal position mounting, with no need to modify lubricant quantity. Moreover units without plugs reduce the risk of oil oxidation and contamination.  
  • Reduction ratios between 5 and 100  
  • Max torque 1.550 Nm and admissible radial loads max 16.500 N  
  • Cases up to 105 in die-cast aluminium alloy and over 110 in G200 grey cast iron  
  • Worm wheel: bronze Cu Sn12 Ni2 (UNI7013-10)  
  • Ground worm profile ZI (UNI4760)  
  • Excellent mechanical strength while being especially lightweight  
  • Load capacity calculated to BS721-83 and verified according to Niemann  
  • Painted with RAL 5010 blue epoxy-polyester powder in according to DIN 1843 
  • PC, pre-stage reduction units available for motor power up to 2,2kW and size up to 090  
  • Worm gear reducers are available with diffferent combinations: SW+SW, SW+ISW, PC+SW  
  • Options: torque arm, feet mounting, output flange, output shaft kit, cover, double extention high speed shaft

Helical gear reducers - cast iron
Series: SH - ISH - PSH - CSH


  • Sizes: 020-030-040-050-060-080-090-100-125-140 
  • Available versions: SH - fitted for motor coupling, ISH - with input shaft, CSH - with compact motor, PSH - fitted for motor coupling with flexible joint 
  • Cases with feet, flange or universal 
  • Power up to 45 kW 
  • Gears with shaved or ground profile 
  • Gearing with 1, 2 and 3 reduction stages 
  • Reduction ratios between 1,2 and 280 
  • Torque max 8.000 Nm and admissible radial loads max 55.000 N 
  • Cases in G200 grey cast iron for high strength and optimized with FEM analysis. Feet, flange or universal mounting 
  • Excellent mechanical strength, particularly suitable to support high axial loads and high reliability 
  • Load capacity calculated to ISO6336 and verified according to AGMA 2001-B88 
  • Painted with RAL 5010 blue epoxy-polyester powder in according to DIN 1843

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