Boston Gear Helical HM Series Quill

Helical HM Series QuillQuill

The Helical-Multiplier reducer can be used as either a speed reducer or increaser or in combination with a 700 Series worm gear reducer to create an efficient right angle double reduction speed reducer.

  • close grained cast iron housing and flanges
  • hardened steel helical gearing for long life
  • anti-friction bearings
  • double lip seals guard against oil leakage
  • brass spring loaded breather plug keeps out dirt and water
  • optional steel bolt on base
  • double bearing design on input and output shaft
Part NumberRatioTorque CapBore CodeOutput RPM @1750
HMF1-2-B5-B52192B5875
HMF1-3-B5-B53216B5583
HMF1-4-B5-B54203B5437
HMF1-5-B5-B55183B5350
HMF2-1.5-B5-B51.5712B51167
HMF2-1.5-B5-B71.5712B51167
HMF2-1.5-B7-B51.5712B71167
HMF2-1.5-B7-B71.5712B71167
HMF2-2-B5-B52822B5875
HMF2-2-B5-B72822B5875
HMF2-2-B7-B52822B7875
HMF2-2-B7-B72822B7875
HMF2-3-B5-B53944B5583
HMF2-3-B5-B73944B5583
HMF2-3-B7-B53944B7583
HMF2-3-B7-B73944B7583
HMF2-4-B5-B54962B5437
HMF2-4-B5-B74962B5437
HMF2-4-B7-B54962B7437
HMF2-4-B7-B74962B7437
HMF2-5-B5-B55884B5350
HMF2-5-B5-B75884B5350
HMF2-5-B7-B55884B7350
HMF2-5-B7-B75884B7350
HMF3-1.5-B11-B111.5932B111167
HMF3-1.5-B11-B91.5932B111167
HMF3-1.5-B9-B111.5932B91167
HMF3-1.5-B9-B91.5932B91167
HMF3-2-B11-B1121075B11875
HMF3-2-B11-B921075B11875
HMF3-2-B9-B1121075B9875
HMF3-2-B9-B921075B9875
HMF3-3-B11-B1131299B11583
HMF3-3-B11-B931299B11583
HMF3-3-B9-B1131299B9583
HMF3-3-B9-B931299B9583
HMF3-4-B11-B1141258B11437
HMF3-4-B11-B941258B11437
HMF3-4-B9-B1141258B9437
HMF3-4-B9-B941258B9437
HMF3-5-B11-B1151155B11350
HMF3-5-B11-B951155B11350
HMF3-5-B9-B1151155B9350
HMF3-5-B9-B951155B9350

Click on the links below to see Drawings and Specs:
Boston Gear Drives – Helical HM Series Quill PDF