643/632/B Tapered Roller Bearing Specifications
Bore d (mm)
69.85
Outer D (mm)
136.525
Width B (mm)
41.275
Dynamic rating Cr (kN)
216
Static rating Cor (kN)
298
Grease limit speed (r/min)
—
Oil limit speed (r/min)
—
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST 643/632/B?
RUIST 643/632/B Tapered Roller Bearing: bore d = 69.85 mm, outer diameter D = 136.525 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 643/632/B carry?
Dynamic load rating Cr = 216 kN and static load rating Cor = 298 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST 643/632/B 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 643/632/B replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 69.85 mm, OD 136.525 mm and width 41.275 mm match ISO dimensions, 643/632/B is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.