NN4944MB Cylindrical Roller Bearing Specifications
Bore d (mm)
220
Outer D (mm)
300
Width B (mm)
80
Dynamic rating Cr (kN)
690
Static rating Cor (kN)
1330
Grease limit speed (r/min)
2500
Oil limit speed (r/min)
3100
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST NN4944MB?
RUIST NN4944MB Cylindrical Roller Bearing: bore d = 220 mm, outer diameter D = 300 mm, width/height B = 80 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST NN4944MB carry?
Dynamic load rating Cr = 690 kN and static load rating Cor = 1330 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST NN4944MB typically used?
Cylindrical Roller Bearing of this size are common in electric motors, gearboxes, pumps, conveyors, fans and compressors across heavy-industry plants.
Can RUIST NN4944MB replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 220 mm, OD 300 mm and width 80 mm match ISO dimensions, NN4944MB is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.