high speed winches are designed with either worm or spur gearing

high speed winches are designed with either worm or spur gearing.  Worm gear and shaft sets operate on perpendicular planes.  Gear sets tend to be enclosed within an oil bath.  They require less torque on input and are ideal for short distances and controlled movement.  Spur gear and shaft sets operate on parallel planes.  Gear sets are usually not enclosed and require lubrication.  They use more torque on input and are ideal for long distances and quick movement.
Heavy Duty winches are available in capacities up to 6,500 pounds for lifting or pulling applications.  They are designed with machine cut hardened worm and spur gears enclosed in an oil bath, electrically released brake, single phase or three phase motors, and self-aligning flange style ball bearings.  Alternative accessories include cable pressure bars, limit switches, grooved drums, manual overrides, and modified drum widths.  Standard design is base mounted but can be modified for wall or ceiling installation.