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


Bearing No. LM778549D/510/510D

Specification data (main dimensions, etc.)

d(mm)584.200
D(mm)762.000
T(mm)401.638
W(mm)396.875
r(min.)(mm)6.4
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)7880
Basic load ratings : C0r(kN)20800
Fatigue load limit : Cu(kN)1770
Axial load factors : Y2(mm)1.43
Axial load factors : Y32.12
Axial load factors : Y01.40
Constant e0.47

Mounting dimensions,weight (reference)

da(min.)(mm)617 mm
Da(max.)(mm)738 mm
Da(max.)(mm)715 mm
S(min.)(mm)8.5 mm
ra(max.)(mm)6.4 mm
rb(max.)(mm)3.2 mm
Axial load factors : Y2(mm)1.43 mm
Axial load factors : Y32.12
Axial load factors : Y01.40
Constant e0.47
Mass(Refer.)(kg)468 kg
JTEKT

2026/07/19