Frequently Asked Questions

“Delroyd”!!! Didn’t you use to be part of “Delaval”, “IMO”, “Boston Gear”, “Nuttall Gear”, and “Colfax”?

  • Yes in all cases.
  • We still are a part of “Nuttall Gear” located in Niagara Falls, N.Y. since Jan. 1998, however, Delroyd has been in business serving the worm gear industry since 1921.
  • As of Nov. 2004 we are all part of the “Altra Industrial Motion Power Transmission Group”.

What kind of reducers do you make?

  • Worm gear from 2” C.D. to 48” C.D. in single, double worm, helical worm & triple worm reduction.
  • In either catalog standard cast iron construction or custom designed fabricated steel construction.
  • With standard ratio’s of 5 to 1 thru 175,000 to 1.
  • Single reductions as low as 2 to 1 and as high as 180 to 1… (Special non-std.)

What industries do you serve?

Do you make open gearing?

  • Yes – straight cylindrical worm gearing.
  • 2” thru 48” C.D. – ratio’s listed above.
  • Reverse Engineering of existing sample worm and gear sets.
  • Utilizing both traditional tangential hob cutting and non-standard custom fly tool cutting capabilities.
  • Worms with hardened and ground threads as a standard.

Why worm gears over helical gears? Efficiency?

  • Compactness in high ratio reduction and less moving parts.
  • Higher momentary shock loads (300%) vs. (200%).
  • Long quiet life – flow of torque is smooth and free from angular velocity changes. This design provides for less vibration, pulsation, and chatter.
  • 90+% efficient up thru 50 to 1 ratio.
We are now a part of Regal Rexnord.
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