The wheels in die-cast steel can, in all cases, be used without prior machining of the wheel tread. The manufacturing tolerances are those of the process.
For use on overhead crane rail, the treads are machined cylindrically.
These wheels are used at low speed.
The loads have been calculated with the maximum guarantee.
They are, however, given by way of indication for running on Vignole rail of normal strength with a sufficiently wide wheel-rail interface for at least 2/3 of the tread to bear on the rail. In the case of heavy loads, we can supply certain wheels with tyres tempered to withstand 110 daN/mm2.