78255X/78551 Tapered Roller Bearing Specifications
Bore d (mm)
64.987
Outer D (mm)
140.03
Width B (mm)
36.512
Dynamic rating Cr (kN)
158
Static rating Cor (kN)
193
Grease limit speed (r/min)
—
Oil limit speed (r/min)
—
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST 78255X/78551?
RUIST 78255X/78551 Tapered Roller Bearing: bore d = 64.987 mm, outer diameter D = 140.03 mm, width/height B = 36.512 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST 78255X/78551 carry?
Dynamic load rating Cr = 158 kN and static load rating Cor = 193 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST 78255X/78551 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 78255X/78551 replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 64.987 mm, OD 140.03 mm and width 36.512 mm match ISO dimensions, 78255X/78551 is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.