778/774D Tapered Roller Bearing Specifications
Bore d (mm)
92.075
Outer D (mm)
180.975
Width B (mm)
85.725
Dynamic rating Cr (kN)
558
Static rating Cor (kN)
145
Grease limit speed (r/min)
—
Oil limit speed (r/min)
—
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST 778/774D?
RUIST 778/774D Tapered Roller Bearing: bore d = 92.075 mm, outer diameter D = 180.975 mm, width/height B = 85.725 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST 778/774D carry?
Dynamic load rating Cr = 558 kN and static load rating Cor = 145 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST 778/774D 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 778/774D replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 92.075 mm, OD 180.975 mm and width 85.725 mm match ISO dimensions, 778/774D is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.