Koyo
FOR REFERENCE ONLY
  • Rolling mill roll neck bearings
  • Four-row tapered roller bearings


Bearing No. 4TR225A

Specification data (main dimensions, etc.)

d(mm)225
D(mm)320
T(mm)230
W(mm)230
r(min.)(mm)2
r1(min.)(mm)2.5
Basic load ratings : Cr(kN)1790
Basic load ratings : C0r(kN)3730
Fatigue load limit : Cu(kN)407
Axial load factors : Y2(mm)1.80
Axial load factors : Y32.69
Axial load factors : Y01.76
Constant e0.37

Mounting dimensions,weight (reference)

da(min.)(mm)246 mm
Da(max.)(mm)310 mm
Da(max.)(mm)293 mm
S(min.)(mm)5 mm
ra(max.)(mm)2 mm
rb(max.)(mm)2 mm
Axial load factors : Y2(mm)1.80 mm
Axial load factors : Y32.69
Axial load factors : Y01.76
Constant e0.37
Mass(Refer.)(kg)57 kg
JTEKT

2026/07/19