Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Inch series


Bearing No. M86643R/10

Specification data (main dimensions, etc.)

d(mm)25.400
D(mm)64.292
T(mm)21.432
B(mm)21.432
C(mm)16.670
r(min.)(mm)1.6
r1(min.)(mm)1.6
Basic load ratings : Cr(kN)69.1
Basic load ratings : C0r(kN)70.7
Fatigue load limit : Cu(kN)9.90
Limiting speeds(Grease lub.)(min-1)6400
Limiting speeds(Oil lub.)(min-1)8500
Load center spread : a(mm)18.0
Constant :e0.55
Axial load factors : Y11.10
Axial load factors : Y00.60

Mounting dimensions,weight (reference)

da(mm)38.0 mm
db(mm)36.5 mm
Da(mm)54.0 mm
Db(mm)61.0 mm
ra(max.)(mm)1.6 mm
rb(max.)(mm)1.6 mm
Mass(Refer.)(kg)0.375 kg
JTEKT

2026/07/18