Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 57008R

Specifications
(Boundary dimensions ...etc)

d(mm)20
D(mm)47
T(mm)15.25
B(mm)14
C(mm)12
r(min.)(mm)1
r1(min.)(mm)1
Basic load ratings : Cr(kN)34.2
Basic load ratings : C0r(kN)25.5
Fatigue load limit : Cu(kN)3.75
Limiting speeds(Grease lub.)(min-1)9000
Limiting speeds(Oil lub.)(min-1)12000
Load center spread : a(mm)12.9
Constant e()0.52
Axial load factors : Y1()1.16
Axial load factors : Y0()0.64

Mounting dimensions

da(min.)(mm)25.5
db(max.)(mm)26
Da(max.)(mm)41.5
Da(min.)(mm)37
Db(min.)(mm)44
Sa(min.)(mm)2
Sb(min.)(mm)3
ra(max.)(mm)1
rb(max.)(mm)1

Refer.

(Refer.)Mass(kg) 0.125
JTEKT

2025/06/19