NN4938MB Cylindrical Roller Bearing Specifications
Bore d (mm)
190
Outer D (mm)
260
Width B (mm)
69
Dynamic rating Cr (kN)
555
Static rating Cor (kN)
1060
Grease limit speed (r/min)
3400
Oil limit speed (r/min)
4000
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST NN4938MB?
RUIST NN4938MB Cylindrical Roller Bearing: bore d = 190 mm, outer diameter D = 260 mm, width/height B = 69 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST NN4938MB carry?
Dynamic load rating Cr = 555 kN and static load rating Cor = 1060 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST NN4938MB 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 NN4938MB replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 190 mm, OD 260 mm and width 69 mm match ISO dimensions, NN4938MB is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.