QJ311 Angular Contact Ball Bearing Specifications
Bore d (mm)
55
Outer D (mm)
120
Width B (mm)
29
Dynamic rating Cr (kN)
130
Static rating Cor (kN)
187
Grease limit speed (r/min)
4500
Oil limit speed (r/min)
6300
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST QJ311?
RUIST QJ311 Angular Contact Ball Bearing: bore d = 55 mm, outer diameter D = 120 mm, width/height B = 29 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST QJ311 carry?
Dynamic load rating Cr = 130 kN and static load rating Cor = 187 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST QJ311 typically used?
Angular Contact Ball Bearing of this size are common in electric motors, gearboxes, pumps, conveyors, fans and compressors across heavy-industry plants.
Can RUIST QJ311 replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 55 mm, OD 120 mm and width 29 mm match ISO dimensions, QJ311 is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.