Boston Gear (Charlotte, NC) offers the 700 Series speed reducers for heavy-duty conveyor systems. The 752 size worm gear speed reducers feature hollow output shafts in 5.25" center distance. Output torque ranges up to 12,250 lb.ft. Six new bore sizes are offered ranging from 2" to 3-7/16". Double reduction ratios are also available. The internal worm is specially ground for lower heat generation.The speed reducers feature rugged cast iron housings and high-strength bronze worm gears mounted between heavy-duty tapered roller bearings. The 752 models feature larger output bearings for greater rigidity while providing reduction of drivetrain components through shaft mounting flexibility.