NK20/20 Needle roller bearings - Horton Bearing Services

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NK20/20 Needle roller bearings image

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The details of Needle roller bearings

Bearing number:4T-34274/34478
Size (mm):69.952x121.442x24.608
Bore Diameter (mm):69,952
Outer Diameter (mm):121,442
Width (mm):24,608
d:69,952 mm
D:121,442 mm
T:24,608 mm
B:23,012 mm
C:17,462 mm
ra1 max.:2 mm
a -:1,2 mm
Da:110 mm
db:78 mm
ra max.:2 mm
da:81 mm
Db:116 mm
Weight:1,11 Kg
Basic dynamic load rating (C):91 kN
Basic static load rating (C0):127 kN
(Grease) Lubrication Speed:2 900 r/min
(Oil) Lubrication Speed:3 800 r/min
Calculation factor (e):0,45
Calculation factor (Y0):0,73
d1:98.5 mm
a:25.81 mm
e:0.45
Y2:1.33
Y0:0.73
Mass:1.11 kg
Dynamic load, C:91 kN
Rating life coefficient, A2:1.4
Static load, C0:127 kN
Fatigue limit load, Cu:15.5 kN
Nlim (oil):3,800 rpm
Nlim (grease):2,900 rpm
Min operating temperature, Tmin:-40 °C
Max operating temperature, Tmax:120 °C
Characteristic cage frequency, FTF:0.45 Hz
Characteristic rolling element frequency, BSF:9.37 Hz
Characteristic outer ring frequency, BPF0:10.79 Hz
Characteristic inner ring frequency, BPFI:13.21 Hz
ra max:2 mm
r1a max:2 mm

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