Koyo
FOR REFERENCE ONLY
  • Tapered roller bearings
  • Single-row
  • Inch series
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Bearing No. 615/612

Specifications
(Boundary dimensions ...etc)

d(mm)44.450
D(mm)120.650
T(mm)41.275
B(mm)41.275
C(mm)31.750
r(min.)(mm)3.6
r1(min.)(mm)3.2
Basic load ratings : Cr(kN)218
Basic load ratings : C0r(kN)217
Fatigue load limit : Cu(kN)34.0
Limiting speeds(Grease lub.)(min-1)3500
Limiting speeds(Oil lub.)(min-1)4600
Load center spread : a(mm)27.3
Constant :e()0.31
Axial load factors : Y1()1.91
Axial load factors : Y0()1.05

Mounting dimensions

da(mm)62.0
db(mm)56.0
Da(mm)105.0
Db(mm)110.0
ra(max.)(mm)3.6
rb(max.)(mm)3.2

Refer.

(Refer.)Mass(kg) 2.333
JTEKT

2025/05/13