53308U Bearing Specifications
Bore d (mm)
40
Outer D (mm)
78
Width B (mm)
28.5
Dynamic rating Cr (kN)
70
Static rating Cor (kN)
135
Grease limit speed (r/min)
2200
Oil limit speed (r/min)
3400
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST 53308U?
RUIST 53308U Bearing: bore d = 40 mm, outer diameter D = 78 mm, width/height B = 28.5 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST 53308U carry?
Dynamic load rating Cr = 70 kN and static load rating Cor = 135 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST 53308U typically used?
Bearing of this size are common in electric motors, gearboxes, pumps, conveyors, fans and compressors across heavy-industry plants.
Can RUIST 53308U replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 40 mm, OD 78 mm and width 28.5 mm match ISO dimensions, 53308U is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.