Gear rims are large, internally or externally toothed gear ring with relatively small wall thickness.
It usually encloses large cylindrical components and is often designed for reasons of its mountability divided (two parts, four parts with fittings). Large sprockets are used for rotary movement of cranes and excavators and are often manufactured here together with the rotary bearing (ball bearings) in one component.
Gear rims without ball bearings can be found on large mills and rotary kilns in the cement and mineral industries.
Due to its sometimes enormous dimensions (diameter sometimes over 10 meters), the gears of sprockets often do not run in an enclosing housing, but use a grease lubrication and special “cleaning equipment” that clean in circulation before meshing with the mating gear, the pinion, the tooth gaps and lubricate with grease. Often, the suspension construction also provides for resilience to allow the sprocket to evade a contaminant particle.
Deutsche Großwälzlager GmbH is a specialist company certified to DIN EN ISO 9001: 2008. On our modern CNC-controlled induction hardening plant, we process large parts up to a diameter of 8 meters in the circulation feed process, as well as medium and small series in the feed process (rotating) for mechanical engineering.
Our own Induktorbau allows us a high responsiveness even with special geometries of the workpieces, so that even complicated parts can be processed at short notice.