31311 Tapered Roller Bearing Specifications
Bore d (mm)
55
Outer D (mm)
120
Width B (mm)
31.5
Dynamic rating Cr (kN)
134
Static rating Cor (kN)
157
Grease limit speed (r/min)
—
Oil limit speed (r/min)
—
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST 31311?
RUIST 31311 Tapered Roller Bearing: bore d = 55 mm, outer diameter D = 120 mm, width/height B = 31.5 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST 31311 carry?
Dynamic load rating Cr = 134 kN and static load rating Cor = 157 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST 31311 typically used?
Tapered Roller Bearing of this size are common in electric motors, gearboxes, pumps, conveyors, fans and compressors across heavy-industry plants.
Can RUIST 31311 replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 55 mm, OD 120 mm and width 31.5 mm match ISO dimensions, 31311 is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.