NN4988K Cylindrical Roller Bearing Specifications
Bore d (mm)
440
Outer D (mm)
600
Width B (mm)
160
Dynamic rating Cr (kN)
2370
Static rating Cor (kN)
6000
Grease limit speed (r/min)
1100
Oil limit speed (r/min)
1400
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST NN4988K?
RUIST NN4988K Cylindrical Roller Bearing: bore d = 440 mm, outer diameter D = 600 mm, width/height B = 160 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST NN4988K carry?
Dynamic load rating Cr = 2370 kN and static load rating Cor = 6000 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST NN4988K 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 NN4988K replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 440 mm, OD 600 mm and width 160 mm match ISO dimensions, NN4988K is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.