Above are a couple of pictures of what are known as an Aqua Marine Supply (AMS) Enclosed Belt Drive 'EBD' Hoists. The upper picture depicts a wired package that's available at Boat Lift Warehouse.com. The 3000 lbs unit with 3/4 HP motor retails for somewhere over $500.00. The 4000 lbs unit with 1 HP motor retails for $545.00 These units are reportedly a bit faster that the typical flat plate hoist, with advertised travel speeds of 4 - 4.8 ft. per minute. Note: speeds are always dependant upon take-up drum diameter - amount of wraps on the drum and the actual diameter of the wire rope used.
As you can see from the lower of the two pictures, the output shaft is just peeking out from above the belt at the 6 o'clock position. They claim that this unit never needs greasing.
