578/572D Tapered Roller Bearing Specifications
Bore d (mm)
79.985
Outer D (mm)
139.992
Width B (mm)
66.675
Dynamic rating Cr (kN)
333
Static rating Cor (kN)
86.4
Grease limit speed (r/min)
—
Oil limit speed (r/min)
—
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST 578/572D?
RUIST 578/572D Tapered Roller Bearing: bore d = 79.985 mm, outer diameter D = 139.992 mm, width/height B = 66.675 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST 578/572D carry?
Dynamic load rating Cr = 333 kN and static load rating Cor = 86.4 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST 578/572D typically used?
Tapered Roller Bearing of this size are common in electric motors, gearboxes, pumps, conveyors, fans and compressors across heavy-industry plants.
Can RUIST 578/572D replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 79.985 mm, OD 139.992 mm and width 66.675 mm match ISO dimensions, 578/572D is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.