NN4940MB Cylindrical Roller Bearing Specifications
Bore d (mm)
200
Outer D (mm)
280
Width B (mm)
80
Dynamic rating Cr (kN)
655
Static rating Cor (kN)
1220
Grease limit speed (r/min)
3200
Oil limit speed (r/min)
3800
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST NN4940MB?
RUIST NN4940MB Cylindrical Roller Bearing: bore d = 200 mm, outer diameter D = 280 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 NN4940MB carry?
Dynamic load rating Cr = 655 kN and static load rating Cor = 1220 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST NN4940MB 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 NN4940MB replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 200 mm, OD 280 mm and width 80 mm match ISO dimensions, NN4940MB is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.