Back-Up Roll & Thrust Blocks
back-up roll assemblies have a higher load bearing capacity than
other conventional units, and the bodies are supported by the bearings
along its entire length, therefore reducing edge loading and premature
2. The back-up roll unit acts as a self contained
unit which is pre-lubricated at the manufacturer, therefore eliminating
expensive lubrication access on the bearing as well as continuous
lubrication when installed at the mill and during its service/ operating
3. The unit is equipped with a seal on each end,
which is a two piece, non-contact seal, therefore extending shaft
and housing life. The seal offers zero leakage and total exclusion
of oil, water, dust and chemicals. The seal material is PTFE which
is resistant to most chemicals. Unlike many other seals, this seal
can be re-used when the bearing is taken apart for maintenance.
4. The back-up roll unit is designed such that
it can be disassembled and re-ground to remove fatigue marks at
low cost. These back-up roll units can therefore be used over and
over again, therefore implementing large cost savings for the mill.
5. The outside diameter of the body is crowned
to eliminate edge loading and fatigue.
6. The back-up roll unit is ground to section height
requirements in order to facilitate uniform load distribution across
the entire length of the work roll during operation.
7. BEARING SERVICE COMPANY manufactures
these back-up units in 52100 bearing quality steel as well as 440C
stainless steel for additional corrosion resistance and prevention
of material adhesion to the rolls and shafts.
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