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Worm gearboxes (worm gear speed reducers) drive a load at a reduced fixed ratio of the motor speed, utilizing a worm pinion (or screw) that is coupled with a round toothed gear (or worm wheel. Output torque is increased by that same ratio, while horsepower is unchanged (less efficiency losses).
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Worm Gearboxes
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Worm gearboxes (speed reducers) are mechanical power transmission components that utilize a worm pinion (or screw) that is coupled with a round toothed gear (or worm wheel). As a motor turns the worm pinion, its spirals will cause the worm wheel to turn and drive a load at a reduced ratio of the supplied motor speed. Worm gearboxes provide reliable speed reduction and increased torque with virtually no loss in horsepower.
For part listings and specifications, go to Shop Now
Stainless Steel Worm Gearboxes
These heavy-duty, right-angle worm gear reducers offer exceptional value for applications where food-grade or corrosion resistant equipment is required. The stainless steel housings provide protection from close-range high pressure, high temperature spray downs.
- BEAG certified (Baking Equipment Assessment Group)
- IP69K rated, with housing, covers, and flange made of 304 stainless steel
- 1.75" to 2.625" center distances (frame sizes)
- 5:1 to 60:1 ratios
- 56C and 145TC input faces
- Hollow shaft output
- Single and dual output shaft kits available
- Prefilled with Mobil CIBUS 460 H1 food grade lubricant
- Sealed internal bladder functions as a breather vent
- Input flange includes O-ring to prevent moisture intrusion
- Worm wheel constructed of CuSn12Ni2 bronze alloy with high-efficiency tooth profile
- Output seals are double-lipped, VITON
Cast Iron Worm Gearboxes
Cast iron worm gearboxes are built tough with rugged cast iron housings that can withstand harsh industrial environments and provide a long trouble-free service life.
- One-piece cast iron gear box housing, 1045 carbon steel shaft
- Dual shaft, right hand shaft, left hand shaft, and hollow shaft output types
- 1.75" to 3.25" center distances (frame sizes)
- 5:1 to 60:1 ratios
- C-face mounting interfaces for C-face motors
- Double bearing sets on both shaft ends, heavy-duty bearings on the output shaft
- Interior channel guides oil to directly and constantly lube bearings
- All gear reducer unitse filled with Mobil #SHC634 synthetic oil
- Double-lipped embedded oil seals to prevent gearbox leakage
- Universally interchangeable compact design ensures easy OEM replacement
Aluminum Worm Gearboxes
Aluminum worm gearboxes are lower-cost alternatives that feature a lightweight construction, and hollow-shaft outputs (all the way through from one side to the other). They are ideal for light-duty applications that have a less frequent run rate or can justify a shorter service life.
- 30mm to 75mm center distances (frame sizes)
- 10:1 to 100:1 ratios (in most sizes)
- 56C, 145TC, and 182/4TC input faces
- Single or double output shafts
- Hardened worm shaft for increased durability
- Two bearings on input and output shafts
- NEMA motor input flanges
- All units filled with Mobil SHC634 synthetic oil
- No vent plug or breather needed; maintenance-free reducer
- Double lip oil seals prevent leakage
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