Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Inch series
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Bearing No. 857R/854

Specifications
(Boundary dimensions ...etc)

d(mm)92.075
D(mm)190.500
T(mm)57.150
B(mm)57.531
C(mm)44.450
r(min.)(mm)7.9
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)482
Basic load ratings : C0r(kN)565
Fatigue load limit : Cu(kN)72.4
Limiting speeds(Grease lub.)(min-1)2100
Limiting speeds(Oil lub.)(min-1)2700
Load center spread : a(mm)39.9
Constant :e()0.33
Axial load factors : Y1()1.79
Axial load factors : Y0()0.99

Mounting dimensions

da(mm)121.0
db(mm)106.0
Da(mm)170.0
Db(mm)174.0
ra(max.)(mm)7.9
rb(max.)(mm)3.2

Refer.

(Refer.)Mass(kg) 7.52
JTEKT

2025/05/10