Deep groove ball bearing made of rolling bearing steel GCr15 (equivalent to SAE52100 and DIN 100Cr6) are extremely economical, withstand high load-ratings and are suitable for temperatures from circa -30°C up to +120°C, in case of nitrile rubber seals up to circa +100°C in the long run. The rolling bearing steel is wear-resistant, shock-resistant, conductive and magnetic.