Altra Worm Gearbox

Altra worm gearboxes can be customised according to your applications and requirements. For more details, get in touch with us.


Power range: 0.12 - 7.5 kW

Reduction ratio range: 7.5:1 - 100:1

Sizes: ALM25 to ALM130


  • Aluminium alloy composes the housing, flanges, feet upto size 90 and cast iron is used for the sizes 110 and above
  • Steel is used for the worm shaft and the case is hardened to 58-60 HRC and profile ground
  • The worm wheel is composed of G20 cast iron hub upon which a casting of AB1 bronze rim is fitted
  • Synthetic oil grade: ISO VG 320