700 Series Worm Reducers

Amusement Ride & Ski Lift Market

Water/Boat Rides

Boston Gear

Standard 700 Series Worm Gear Speed Reducers

Boston Gear Standard 700 Series Worm Gear Speed Reducers

Our standard 700 Series - the heart of Boston Gear's speed reducer product line - has been serving industry reliably for over 40 years. Its proven modular design has set the industry standard for performance and is the most imitated product in today's worm gear speed reducer market. But why settle for a knock-off when you can have the original - from Boston Gear.


  • 11 basic single reduction sizes
  • 8 basic double reduction sizes
  • 1/6 - 25 HP
  • 5:1 - 100:1 ratios single reduction
  • 100:1 - 3600:1 ratios double reduction
  • Non-flanged, NEMA C-face quill, and coupled input styles
  • Projecting and hollow output shafts
  • Projecting diameters from 1/2" to 2-1/4"
  • Hollow output bore diameters from 5/8" to 3-7/16" (with over 20 bore sizes in stock)

Use our product cross reference for all your replacements, upgrades and competitor cross-overs.

    • The 700 Series' large oil reservoir provides efficient heat dissipation and lubrication for longer operating life.
    • Its multi-position mounting flexibility allows for installation in virtually any position.
    • Housings are straddle-milled, top and bottom, for precise alignment of horizontal and vertical bases.
    • Internal baffles assure positive, leak-free venting.
    • The 700 Series' rugged housing, fabricated of fine-grained, gear-quality cast iron, provides maximum strength for maximum durability, as well as greater precision during worm and gear alignment.
    • Boston Gear's 700 Series high-strength bronze worm gear is straddle mounted between heavy-duty tapered roller bearings to increase thrust and overhung load capacities, sizes 713-760.
    • Our 700 Series' high-strength steel output shaft assures capacity for high torque and overhung loads.
    • Pipe plugs allow easy fill, level, and drain in any mounting position.
    • The 700 Series' super-finished oil-seal diameters on both input and output shafts extend seal life.
    • Both 2D and 3D CAD drawings are available in our eCatalog.
We are now a part of Regal Rexnord.