Boston Gear 30348660 F832BF-3.9K-B5-M8 inline helical speed reducer with 3.9:1 ratio and 56C input flange. This cast iron unit is designed for general industrial power transmission applications requiring compact, high-efficiency speed reduction.

Product Features

• Four basic sizes 1/6 - 10 HP
• Over 40 different ratios 1.5:1 - 71:1 double-reduction ratios 36:1 - 250:1 triple-reduction ratios
• Non-flanged and NEMA c-face input styles
• Base-mount and output flange-mount models available
• Output-shaft diameters from 3/4" to 1 5/8"
• The standard NEMA C-face design will accept any standard NEMA motor, making it exceptionally versatile.
• Ratios up to 70:1 in just two stages means increased efficiency and reduced case size.
• Accessible oil seals simplify routine product maintenance.
• All units can be double sealed on both the input and output to withstand the rigors of even the most demanding applications.
• 800 Series drives come pre-filled with synthetic lubrication for your specific mounting position.
• Sizes 3 and 4 are lubricated for life which promotes trouble-free operation.
• Washdown duty units in white or stainless steel epoxy coatings make these gear drives ideal for the most severe Washdown.