1221 Self-Aligning Ball Bearing Specifications
Bore d (mm)
105
Outer D (mm)
190
Width B (mm)
36
Dynamic rating Cr (kN)
82.5
Static rating Cor (kN)
32.5
Grease limit speed (r/min)
3000
Oil limit speed (r/min)
3600
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST 1221?
RUIST 1221 Self-Aligning Ball Bearing: bore d = 105 mm, outer diameter D = 190 mm, width/height B = 36 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST 1221 carry?
Dynamic load rating Cr = 82.5 kN and static load rating Cor = 32.5 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST 1221 typically used?
Self-Aligning Ball Bearing of this size are common in electric motors, gearboxes, pumps, conveyors, fans and compressors across heavy-industry plants.
Can RUIST 1221 replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 105 mm, OD 190 mm and width 36 mm match ISO dimensions, 1221 is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.