Roller bearings deliver smooth load support, high rigidity, and long service life for precision machinery, with reliable performance up to 4000-5300 RPM and versatile grease or oil lubrication

HR30210J Roller Bearing by NSK in 50x90x21.75 mm size
✔️ Pack: single bearing; 50x90x21.75 mm; mass 0.557 kg; Cr 76000 N

This NSK HR30210J roller bearing is designed to support heavy radial loads in precision machinery, conveyors, and automation setups where compact, rugged bearing support is needed.

✅ d 50 mm, D 90 mm, T 21.75 mm, B 20 mm, C 17 mm
✅ Cone rmin. 1.5 mm, Cup rmin. 1.5 mm
✅ Cr 76000 N, C0r 91500 N
✅ Limiting speeds 4000 min-1 (Grease); 5300 min-1 (Oil)
✅ Mass 0.557 kg

💡 What factors determine the performance of a roller bearing in high-speed applications? Dynamic load rating, lubrication method, and mounting precision determine life and efficiency. Handy guidelines follow. - Dynamic vs static load rating and how they influence life - Lubrication choice: grease vs oil and impact on speeds - Proper shaft alignment and preload to reduce wear