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


Bearing No. 687/672

Specification data (main dimensions, etc.)

d(mm)101.600
D(mm)168.275
T(mm)41.275
B(mm)41.275
C(mm)30.162
r(min.)(mm)3.6
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)282
Basic load ratings : C0r(kN)349
Fatigue load limit : Cu(kN)50.4
Limiting speeds(Grease lub.)(min-1)2200
Limiting speeds(Oil lub.)(min-1)3000
Load center spread : a(mm)38.6
Constant :e0.47
Axial load factors : Y11.28
Axial load factors : Y00.70

Mounting dimensions,weight (reference)

da(mm)114.0 mm
db(mm)115.0 mm
Da(mm)146.0 mm
Db(mm)157.0 mm
ra(max.)(mm)3.6 mm
rb(max.)(mm)3.2 mm
Mass(Refer.)(kg)3.37 kg
JTEKT

2026/07/07