KOYO NTA-512 services Thrust Roller Bearing

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KOYO NTA-512 services Thrust Roller Bearing image

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Tapered roller thrust bearings Product Description

Bearing number:4T-HM212046/HM212011
Size (mm):63.5x122.238x38.1
Bore Diameter (mm):63,5
Outer Diameter (mm):122,238
Width (mm):38,1
d:63,5 mm
D:122,238 mm
T:38,1 mm
B:38,354 mm
C:29,718 mm
ra1 max.:3,3 mm
a:11,1 mm
Da:108 mm
db:73 mm
ra max.:3,5 mm
da:80 mm
Db:116 mm
Weight:1,95 Kg
Basic dynamic load rating (C):187 kN
Basic static load rating (C0):244 kN
(Grease) Lubrication Speed:3 100 r/min
(Oil) Lubrication Speed:4 100 r/min
Calculation factor (e):0,34
Calculation factor (Y0):0,98
d1:91.5 mm
e:0.34
Y2:1.78
Y0:0.98
Mass:1.95 kg
Dynamic load, C:187 kN
Rating life coefficient, A2:1.4
Static load, C0:244 kN
Fatigue limit load, Cu:29.8 kN
Nlim (oil):4,100 rpm
Nlim (grease):3,100 rpm
Min operating temperature, Tmin:-40 °C
Max operating temperature, Tmax:120 °C
Characteristic cage frequency, FTF:0.42 Hz
Characteristic rolling element frequency, BSF:6.06 Hz
Characteristic outer ring frequency, BPF0:7.17 Hz
Characteristic inner ring frequency, BPFI:9.83 Hz
ra max:3.5 mm
r1a max:3.3 mm

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