Inner Diameter (Bore): 55 mm Outer Diameter (OD): 120 mm Width (Thickness): 29 mm Dynamic Load Rating: 74.1 kN Static Load Rating: 45 kN Limiting Speed: 3,800 RPM Temperature Range: -20 °C to +120 °C (-4 °F to +248 °F) Material: High-quality 52100 chrome steel with a pressed sheet steel cage