6921NR Deep Groove Ball Bearing Specifications
Bore d (mm)
105
Outer D (mm)
145
Width B (mm)
20
Dynamic rating Cr (kN)
46.5
Static rating Cor (kN)
42
Grease limit speed (r/min)
4300
Oil limit speed (r/min)
5300
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST 6921NR?
RUIST 6921NR Deep Groove Ball Bearing: bore d = 105 mm, outer diameter D = 145 mm, width/height B = 20 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST 6921NR carry?
Dynamic load rating Cr = 46.5 kN and static load rating Cor = 42 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST 6921NR typically used?
Deep Groove Ball Bearing of this size are common in electric motors, gearboxes, pumps, conveyors, fans and compressors across heavy-industry plants.
Can RUIST 6921NR replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 105 mm, OD 145 mm and width 20 mm match ISO dimensions, 6921NR is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.