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


Bearing No. 30211CR

Specification data (main dimensions, etc.)

d(mm)55
D(mm)100
T(mm)22.75
B(mm)21
C(mm)17
r(min.)(mm)2
r1(min.)(mm)1.5
Basic load ratings : Cr(kN)112
Basic load ratings : C0r(kN)108
Fatigue load limit : Cu(kN)16.2
Limiting speeds(Grease lub.)(min-1)3900
Limiting speeds(Oil lub.)(min-1)5200
Load center spread : a(mm)24.3
Constant e0.55
Axial load factors : Y11.10
Axial load factors : Y00.60

Mounting dimensions,weight (reference)

da(min.)(mm)65 mm
db(max.)(mm)63 mm
Da(max.)(mm)90 mm
da(min.)(mm)84 mm
db(min.)(mm)95 mm
Sa(min.)(mm)4 mm
Sb(min.)(mm)5.5 mm
ra(max.)(mm)2 mm
rb(max.)(mm)1.5 mm
Mass(Refer.)(kg)0.750 kg
JTEKT

2026/07/01