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


Bearing No. LM258649D/610/610D

Specification data (main dimensions, etc.)

d(mm)317.500
D(mm)422.275
T(mm)269.875
W(mm)269.875
r(min.)(mm)3.2
r1(min.)(mm)1.6
Basic load ratings : Cr(kN)3140
Basic load ratings : C0r(kN)7450
Fatigue load limit : Cu(kN)747
Axial load factors : Y2(mm)2.12
Axial load factors : Y33.15
Axial load factors : Y02.07
Constant e0.32

Mounting dimensions,weight (reference)

da(min.)(mm)341 mm
Da(max.)(mm)407 mm
Da(max.)(mm)392 mm
S(min.)(mm)8.5 mm
ra(max.)(mm)3.2 mm
rb(max.)(mm)1.6 mm
Axial load factors : Y2(mm)2.12 mm
Axial load factors : Y33.15
Axial load factors : Y02.07
Constant e0.32
Mass(Refer.)(kg)104 kg
JTEKT

2026/07/18