Manufacturer: Schaeffler INA
Type: Needle Roller Bearing
Model: NA 4903
Dimensions
Bore diameter d: 17 mm
Outer diameter D: 30 mm
Width B: 13 mm
Minimum chamfer dimension rmin: 0.3 mm
Basic load ratings:
Dynamic Cr: 12400 N
Static C0r: 14600 N
Fatigue load limit Cur: 2650 N
Limiting speed: 20000 rpm
Limiting speed for grease: 12000 rpm
Reference speed: 10200 rpm
Operating temperature: -30 … +120 °C