Apart from the standardized GCr15 bearing steel, custom bearings can be made by or combined with a variety of materials or parts, such as M50 and Martensitic SV30 stainless steel, L605 cobalt and GR5 titanium alloys, ceramic balls, ceramic rings, special greases or plastics, to meet the most critical application challenges in terms of corrosion resistance, fatigue resistance and wear resistance per customer’s application、temperature range and specific technical requirements.