FAQs

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?

• Steel
• Paper / Pulp & Wood / Plywood
• Water / Waste Water Treatment
• Petro - Chemical
• Mixing & Agitation
• Material Handling
• Food & Food Processing
• Power Utility / Generation
• Mining
• Machine tools
• Elevators / People Movers
• Many others

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.