51309 Bearing Specifications
Bore d (mm)
45
Outer D (mm)
85
Width B (mm)
28
Dynamic rating Cr (kN)
80.5
Static rating Cor (kN)
163
Grease limit speed (r/min)
2000
Oil limit speed (r/min)
3000
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST 51309?
RUIST 51309 Bearing: bore d = 45 mm, outer diameter D = 85 mm, width/height B = 28 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST 51309 carry?
Dynamic load rating Cr = 80.5 kN and static load rating Cor = 163 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST 51309 typically used?
Bearing of this size are common in electric motors, gearboxes, pumps, conveyors, fans and compressors across heavy-industry plants.
Can RUIST 51309 replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 45 mm, OD 85 mm and width 28 mm match ISO dimensions, 51309 is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.