Throop
Rock Bit Company manufactures a line of sealed roller bearing bits for use in a variety of
applications, where historically, bearing life has been the limiting
factor in bit performance. Throop sealed roller bearing bits, available in
both steel tooth and tungsten carbide designs, offer extended bearing life
to utilize the full life of the cutting structure.
The lubrication system for Throop Sealed Roller Bearing Bits, consists of a
grease reservoir with passages to the bearings, a synthetic rubber
diaphragm and a steel reservoir cap. The lubrications system equalizes the
internal and external pressure across the seal, which serves to increase
seal life. A special factory applied lubricant fills the bearing area, and
the grease reservoir in the leg of the bit supplies additional grease to
the bearings as needed.
The bearings are sealed using specially designed "O" rings seals, made of
Highly Saturated Nitrile (HSN) for maximum bearing protection and life.
These seals are effective in preventing the intrusion of the drilling
fluid into the bearing system.
