Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Metric series
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Bearing No. 30304AC

Specifications
(Boundary dimensions ...etc)

d(mm)20
D(mm)52
T(mm)16.25
B(mm)16
C(mm)12
r(min.)(mm)1.5
r1(min.)(mm)1.5
Basic load ratings : Cr(kN)43.3
Basic load ratings : C0r(kN)28.4
Fatigue load limit : Cu(kN)4.65
Limiting speeds(Grease lub.)(min-1)8300
Limiting speeds(Oil lub.)(min-1)11000
Load center spread : a(mm)13.5
Constant e()0.55
Axial load factors : Y1()1.10
Axial load factors : Y0()0.60

Mounting dimensions

da(min.)(mm)28.5
db(max.)(mm)28
Da(max.)(mm)43.5
Da(min.)(mm)42
Db(min.)(mm)49
Sa(min.)(mm)4
Sb(min.)(mm)4
ra(max.)(mm)1.5
rb(max.)(mm)1.5

Refer.

(Refer.)Mass(kg) 0.170
JTEKT

2025/06/14