N311M Cylindrical Roller Bearing Specifications
Bore d (mm)
55
Outer D (mm)
120
Width B (mm)
29
Dynamic rating Cr (kN)
136
Static rating Cor (kN)
111
Grease limit speed (r/min)
5000
Oil limit speed (r/min)
6300
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST N311M?
RUIST N311M Cylindrical Roller Bearing: bore d = 55 mm, outer diameter D = 120 mm, width/height B = 29 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST N311M carry?
Dynamic load rating Cr = 136 kN and static load rating Cor = 111 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST N311M 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 N311M replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 55 mm, OD 120 mm and width 29 mm match ISO dimensions, N311M is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.