621/612 Tapered Roller Bearing Specifications
Bore d (mm)
53.975
Outer D (mm)
120.65
Width B (mm)
41.275
Dynamic rating Cr (kN)
192
Static rating Cor (kN)
244
Grease limit speed (r/min)
—
Oil limit speed (r/min)
—
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST 621/612?
RUIST 621/612 Tapered Roller Bearing: bore d = 53.975 mm, outer diameter D = 120.65 mm, width/height B = 41.275 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST 621/612 carry?
Dynamic load rating Cr = 192 kN and static load rating Cor = 244 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST 621/612 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 621/612 replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 53.975 mm, OD 120.65 mm and width 41.275 mm match ISO dimensions, 621/612 is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.