MHD series
Mid-Heavy Duty gearboxes - PBZ

Mid-Heavy Duty gearboxes



The Motovario PBZ series consists of parallel helical and bevel-helical gear reducers  up  to  4  reduction  stages,  characterised  by  high  power  density, compact  size,  modularity,  reliability  and  a  favourable  performance/sturdiness ratio.
These  industrial  gear  reducers  have  been  conceived  and  designed  for continuous, critical and particularly arduous applications requiring a high number of accessories, as well as dedicated options for specific fields: PBZ units perfectly meet all these needs, fully satisfying the heavy-duty industry world.


  • Sizes: 179, 199, 219, 249, 269, 279, 319, 349, 399, 409
  • Gearing: 2, 3, and 4 stages for parallel gear reducers, and 3, and 4 stages for helical bevel gear reducers
  • Nominal output momentum 110,000 Nm (n1= 1400 rpm)
  • Available input versions: P – with bell gear and joint, I – with solid shaft
  • Available output versions:
    • HC - hollow output shaft with key slot
    • HL - hollow output shaft with locking unit
    • CS - cylindrical solid output shaft with key
    • CD - cylindrical double outlet solid output shaft with key
  • Gears and sprockets: hardened and case-hardened 21NiCrMo2 steel
  • Reduction ratios ranging from 6 to 419
  • EN-GJS400-15 UNI EN 156 cast-iron casing
  • Outer protection with two-component water-based paint, minimum coat thickness 80 microns.
  • RAL 5010 blue

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