Koyo
FOR REFERENCE ONLY
  • Rolling mill roll neck bearings
  • Four-row tapered roller bearings
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Bearing No. 67986D/20/21D

Specifications
(Boundary dimensions ...etc)

d(mm)206.375
D(mm)282.575
T(mm)190.500
W(mm)190.500
r(min.)(mm)3.2
r1(min.)(mm)0.8
Basic load ratings : Cr(kN)1280
Basic load ratings : C0r(kN)2830
Fatigue load limit : Cu(kN)310
Axial load factors : Y2(mm)1.33
Axial load factors : Y3()1.97
Axial load factors : Y0()1.30
Constant e()0.51

Mounting dimensions

da(min.)(mm)222
Da(max.)(mm)270
Da(max.)(mm)259
S(min.)(mm)7
ra(max.)(mm)3.2
rb(max.)(mm)0.8
Axial load factors : Y2(mm)1.33
Axial load factors : Y3()1.97
Axial load factors : Y0()1.30
Constant e()0.51

Refer.

(Refer.)Mass(kg) 34.8
JTEKT

2025/06/01