Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Inch series
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Bearing No. HM212049/10

Specifications
(Boundary dimensions ...etc)

d(mm)66.675
D(mm)122.238
T(mm)38.100
B(mm)38.354
C(mm)29.718
r(min.)(mm)3.6
r1(min.)(mm)1.6
Basic load ratings : Cr(kN)238
Basic load ratings : C0r(kN)249
Fatigue load limit : Cu(kN)39.1
Limiting speeds(Grease lub.)(min-1)3200
Limiting speeds(Oil lub.)(min-1)4300
Load center spread : a(mm)27.3
Constant :e()0.34
Axial load factors : Y1()1.78
Axial load factors : Y0()0.98

Mounting dimensions

da(mm)82.0
db(mm)75.5
Da(mm)110.0
Db(mm)116.0
ra(max.)(mm)3.6
rb(max.)(mm)1.6

Refer.

(Refer.)Mass(kg) 1.856
JTEKT

2025/07/01