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Detailed knowledge of the design criteria and performance requirements of
the different original manufactures is needed in order to manufacture rollers
for all the crawler tractors in the market. After critical analysis, the best
solution is extended to our production lines.
Superior rail wear
resistance, capacity to bear high radial loads, large bearing area for bushings,
sizable oil capacity and a perfect seal are the essential features of these rollers.
Berco rollers are maintenance free, have a long life and operate perfectly
under every working condition.
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Roller Shells-
Exclusive high hardenability boron steels and specially designed heat treatment
of these components allow the inner surfaces (in contact with hubs and/or bushings)
to be Rockwell C 40 and tread surfaces to be Rockwell C 56. This guarantees
complete resistance to fatigue and shock stresses caused by the most severe
applications and wear life extending well beyond their wear limits.
Collars - The collars, made of nodular cast iron, offer maximum strength and
resistance to failure. Depending on design, these parts could feature induction
hardened thrust surfaces for better axial load capacity.
Bushings -
The bushings, of the bimetallic type, with their external steel shell, are resistant
to deformations and keep their position perfectly. The thin inner brass stratum is
an excellent antifriction.
Shafts - The alloy steel gives toughness to
the drop forged shafts. Precise final machining, performed with sophisticated Flexible
Manufacturing Systems (FMS), maintains a perfect fit on every roller. Induction hardened
surfaces in contact with bushings ( Rockwell C 60 ), carefully machined, extend bushing
life to a maximum.
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