Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Inch series
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Bearing No. 677/672

Specifications
(Boundary dimensions ...etc)

d(mm)85.725
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 :e()0.47
Axial load factors : Y1()1.28
Axial load factors : Y0()0.70

Mounting dimensions

da(mm)105.0
db(mm)99.0
Da(mm)149.0
Db(mm)160.0
ra(max.)(mm)3.6
rb(max.)(mm)3.2

Refer.

(Refer.)Mass(kg) 4.11
JTEKT

2025/05/15