Belt variators, or variable speed pulleys from 1HP - 150HP. Robust and easy to maintain variator can be supplied in an enclosure or loose. Adjustment of speed manual or by servo motor. Tacho speed indication optional.
Inline mechanical variable speed units -0.25 -7.5HP:- Usually supplied complete with motor, turning the adjustment hand wheel the output speed is steplessly changed over a 5:1 range (e.g. 350 - 1750rpm)