Koyo
FOR REFERENCE ONLY
  • Spherical roller bearings
  • Spherical roller bearings
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Bearing No. 21308RZ

Specifications
(Boundary dimensions ...etc)

d(mm)40
D(mm)90
B(mm)23
r(min.)(mm)1.5
Basic load ratings : Cr(kN)105
Basic load ratings : C0r(kN)95.5
Fatigue load limit : Cu(kN)7.55
Limiting speeds(Grease lub.)(min-1)5600
Limiting speeds(Oil lub.)(min-1)7600
Constant e()0.26
Axial load factors : Y1()2.55
Axial load factors : Y2()3.80
Axial load factors : Y0()2.50

Mounting dimensions

da(min.)(mm)48.5
da(max.)(mm)
Da(max.)(mm)81.5
Da(min.)(mm)
ra(max.)(mm)1.5

Refer.

(Refer.)Mass(kg) 0.781
JTEKT

2025/06/15