Koyo
FOR REFERENCE ONLY
  • Spherical roller bearings
  • Spherical roller bearings
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Bearing No. 21306RZ

Specifications
(Boundary dimensions ...etc)

d(mm)30
D(mm)72
B(mm)19
r(min.)(mm)1.1
Basic load ratings : Cr(kN)74.2
Basic load ratings : C0r(kN)62.7
Fatigue load limit : Cu(kN)4.80
Limiting speeds(Grease lub.)(min-1)7200
Limiting speeds(Oil lub.)(min-1)9600
Constant e()0.27
Axial load factors : Y1()2.49
Axial load factors : Y2()3.71
Axial load factors : Y0()2.43

Mounting dimensions

da(min.)(mm)37
da(max.)(mm)
Da(max.)(mm)65
Da(min.)(mm)
ra(max.)(mm)1

Refer.

(Refer.)Mass(kg) 0.430
JTEKT

2025/06/15