Over the years, Delroyd® Worm Gear Speed Reducers have developed an unmatched reputation for reliability and versatility. These years of experience assure you of a proven design and reliable service.

The exclusive use of the involute helicoid thread form (with leaving side contact) on the worm and  gear, provides for high efficiencies and long service life. The hardened, ground and polished alloy steel worm develops a smooth, work hardened surface on the bronze gear. For this reason, the worm gears wear in and improve with prolonged service while other gears are wearing out.

Delroyd® offers a wide selection of model configurations, sizes, ratios and accessories from our standard product line.

Standard Features

• single, double and triple reduction, 2" to 20" center distances
• ratio's of 5:1 to 175,000:1
• drywell construction on vertical units
• multi-mounting configurations
• solid shaft and hollow shaft designs
• fan cooled
• oil level sight glass
• 30,000 psi gray cast iron housings
• high strength alloy steel on input and output shafts
• centrifugally cast phosphorous bronze gears
• high shock load capacity
• interchangeability of components
• "C" face motor flanges
• motor scoops

Fabricated Designs

Whenever worm gear speed reducers may be subjected to severe shock loads or housing damage from external sources as in steel mills or mobile equipment applications, Delroyd® can provide fabricated steel housing with up to 48" center distances, permitting transmission of higher horsepower than are possible with the standard cast iron units.

The fabricated steel housing design provides maximum rigidity and strength for the application. The extra-heavy side plates connect the worm and gear shaft bearing supports, assuring proper meshing of the gear under all conditions of load.

In the smaller sizes, the fabricated steel reducers are interchangeable with Delroyd®'s standard cast iron reducers, per mounting dimensions and internal construction.

Custom Designs

Delroyd® has the design and manufacturing capability to provide a custom speed reducer for your special application, be it a new project or a direct drop-in replacement for a competitor's speed reducer.

The use of fabricated steel reducers allow Delroyd® to match a competitor's footprint, centerline, and shaft height allowing a direct drop-in replacement... saving the customer time and money.

Delroyd®'s unique design and manufacturing experience can provide you with any special worm gear speed reducer or set you may require.