NNU4980 Cylindrical Roller Bearing Specifications
Bore d (mm)
400
Outer D (mm)
540
Width B (mm)
140
Dynamic rating Cr (kN)
1940
Static rating Cor (kN)
4900
Grease limit speed (r/min)
1400
Oil limit speed (r/min)
1700
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST NNU4980?
RUIST NNU4980 Cylindrical Roller Bearing: bore d = 400 mm, outer diameter D = 540 mm, width/height B = 140 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST NNU4980 carry?
Dynamic load rating Cr = 1940 kN and static load rating Cor = 4900 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST NNU4980 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 NNU4980 replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 400 mm, OD 540 mm and width 140 mm match ISO dimensions, NNU4980 is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.