03/12/2021
What makes black oxide the most common coating used in general bearing applications? This alkaline surface treatment, made of only one-micron oxidation depth, does not change the dimensions of the workpiece, delivering numerous advantages for bearing performance.
Besides improving the running-in process, the black oxide layer offers moderate positive effects against the most known bearing failure modes. Additionally, this coating reduces sliding wear, adhesive wear, risks of surface crack formation, friction, smearing and spalling effects, whilst improving oil adhesion, surface protection and more.
The bearing also remains fully functional if the layer is worn off. And it’s thanks to these benefits that we haven’t shied away from using black oxide treatments across our bearing ranges, producing black oxide variants of tapered roller bearings, cylindrical roller bearings, spherical roller bearings, CARB toroidal roller bearings and ball bearings.