Koyo
FOR REFERENCE ONLY
  • Needle roller bearings
  • Drawn cup needle roller bearings
  • Metric series, caged


Bearing No. BK4520

Specification data (main dimensions, etc.)

Fw(mm)45
D(mm)52
C(mm)20
C3(min.)(mm)17.3
r(min.)(mm)1
Basic load ratings : Cr(kN)26.3
Basic load ratings : C0r(kN)55.4
Fatigue load limit : Cu(kN)8.80
Limiting speeds(Grease lub.)(min-1)4600
Limiting speeds(Oil lub.)(min-1)7000
Mounting inner ringJR40x45x20,5

Mounting dimensions,weight (reference)

Mass(Refer.)(kg)0.079 kg
JTEKT

2026/07/08