28990/28921D Tapered Roller Bearing Specifications
Bore d (mm)
61.976
Outer D (mm)
100
Width B (mm)
44.45
Dynamic rating Cr (kN)
171
Static rating Cor (kN)
44.3
Grease limit speed (r/min)
—
Oil limit speed (r/min)
—
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST 28990/28921D?
RUIST 28990/28921D Tapered Roller Bearing: bore d = 61.976 mm, outer diameter D = 100 mm, width/height B = 44.45 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST 28990/28921D carry?
Dynamic load rating Cr = 171 kN and static load rating Cor = 44.3 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST 28990/28921D 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 28990/28921D replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 61.976 mm, OD 100 mm and width 44.45 mm match ISO dimensions, 28990/28921D is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.