WICAS® - WITELS CASSETTE STRAIGHTENING SYSTEM
The rolling elements mainly used in straightening processes with roll-type straighteners suffer extreme wear as the result of the high roll adjusting forces and ever higher production speeds. At the same time, metal particles contaminate the bearings and contribute likewise to a drastic shortening of rolling element life. The WITELS Cassette Straightening System called WICAS(r) was developed specifically to improve this situation.
Notable features of WICAS®:
A) Expert installation of the rolling elements in a closed housing with an additional labyrinth seal prevents practically all soiling of the bearing system, resulting in a useful life up to 30 times longer than that of a conventional straightening roll.
B) The straightening sheave can now be produced in any form, type, quality and strength irrespective of the material used for the bearing system. Oval pressing of the rolling element outer ring, against which the product to be straightened runs, is ruled out with this design.
C) The use of smaller rolling bearings at high speeds of rotation increases the peripheral speed of the larger straightening sheave. Far higher production speeds are thus possible than with conventional straightening rolls.
D) In the case of miniature straightening rolls, cutting the groove in the relatively thin outer rings weakens the straightening roll to an unacceptable degree. This does not happen with WICAS(r) because the bearing shaft as well as the straightening sheave can be made with annular grooves of any shape and size.
E) Flexible use of needle and ball bearings gives the designer considerable scope with regards to the static and dynamic bearing values.
F) It is possible to use bearings with life-time lubrication as well as systems designed for relubrication.
The above-mentioned 30-fold longer useful life of WICAS(r) compared to conventional straightening rolls greatly minimizes the cost-intensive stoppage of individual machines and complete production lines - a benefit that should not be overlooked.