Quality control of tower crane slewing ring is carried out by FINE from the forging to the packaging according to Class procedures.
Certificates are available for each production step, automated records are available for all heat-treatments, hardness tests, surface tests etc.
The bearing material is 42CrMo or 50Mn, the raceway hardening is 4mm to 6mm, depending on the bearing design.
Class-certification is available for all bearings, at additional cost. If the original calculations for the bearings are no longer available, we can have them recalculated by our own structural engineers.