Principle drive types
Worm gear drives for smaller units
– These drives have high-quality alloy
bronze main gears with hardened
steel worms mounted on precision
ball bearings and are enclosed in
dust-tight steel housings for oil-bath
lubrication.
Spur gear drives for bridge or center
column-mounted operations – These
units are manufactured with heattreated,
forged-steel main spur gears,
with alloy steel pinions, directly
coupled to efficient planetary gear
boxes; all mounted on precision
bearings and are enclosed in dusttight
fabricated steel housings for
oil-bath lubrication.
Hydrostatic bearing drives
have two basic parts, a runner and
stationary support pads. An oil film
supports not only the vertical load,
but also positions the rotating load
radially. This configuration gives
maximum clearance in the center of
the drive allowing access to the
column and underflow pumps.