Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 30307XR

Specifications
(Boundary dimensions ...etc)

d(mm)35
D(mm)80
T(mm)22.75
B(mm)21
C(mm)18
r(min.)(mm)2
r1(min.)(mm)1.5
Basic load ratings : Cr(kN)87.2
Basic load ratings : C0r(kN)77.8
Fatigue load limit : Cu(kN)11.4
Limiting speeds(Grease lub.)(min-1)5200
Limiting speeds(Oil lub.)(min-1)7000
Load center spread : a(mm)20.5
Constant e()0.55
Axial load factors : Y1()1.10
Axial load factors : Y0()0.60

Mounting dimensions

da(min.)(mm)45
db(max.)(mm)45
Da(max.)(mm)70
Da(min.)(mm)63
Db(min.)(mm)74
Sa(min.)(mm)3
Sb(min.)(mm)4.5
ra(max.)(mm)2
rb(max.)(mm)1.5

Refer.

(Refer.)Mass(kg) 0.560
JTEKT

2025/06/01