3879/3820 Tapered Roller Bearing Specifications
Bore d (mm)
40
Outer D (mm)
85.725
Width B (mm)
30.162
Dynamic rating Cr (kN)
115
Static rating Cor (kN)
148
Grease limit speed (r/min)
—
Oil limit speed (r/min)
—
Frequently Asked Questions / FAQ
What are the exact dimensions of RUIST 3879/3820?
RUIST 3879/3820 Tapered Roller Bearing: bore d = 40 mm, outer diameter D = 85.725 mm, width/height B = 30.162 mm. All dimensions follow ISO/DIN standards so it drops into existing housings without modification.
What load ratings does RUIST 3879/3820 carry?
Dynamic load rating Cr = 115 kN and static load rating Cor = 148 kN. These figures let you calculate the L10 service life under your actual radial and axial loads.
Where is RUIST 3879/3820 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 3879/3820 replace a SKF, FAG, NSK or TIMKEN unit?
Yes. Because bore 40 mm, OD 85.725 mm and width 30.162 mm match ISO dimensions, 3879/3820 is dimensionally interchangeable with major-brand equivalents. Confirm clearance class (C3/C0) before ordering.