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Single row tapered roller bearings

30228U - NTN

30228U

Tapered roller bearing, pressed steel cage

The single row tapered roller bearing is available in metric dimensions (ISO 355 and JIS B 1512 standards) and in inches (ABMA standard, metric series including J). The single row in tapered roller bearing range, is the most widely used and is generally mounted in opposition.

Documentation

Product information

PRODUCT DEFINITION
BrandNTN
d - Internal diameter140 mm
D - External diameter250 mm
B - Bearing/Inner ring width42 mm
C - Outer ring width36 mm
T - Total width45,75 mm
d1 - External diameter inner ring189 mm
a - Charge load application point48,5 mm
rs - Min fillet radius4 mm
r1s - Min fillet radius3 mm
Mass8,73 kg
ISO 355 referenceT4FB140
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PRODUCT PERFORMANCE
C - Dynamic load465 kN
C0 - Static load570 kN
Cu - Fatigue limit load57 kN
A2 - Rating life coefficient1
e - Coefficient0.44
Y0 - Static axial load coefficient0.76
Y2 - Upper axial load coefficient1.38
N lim - Oil lubrication limit speed1900 tr/min
N lim - Grease lubrication limit speed1400 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da max - Max shoulder diameter IR163 mm
db min - Min IR shoulder diameter158 mm
Da min - Min shoulder diameter OR219 mm
Da max - Max shoulder diameter OR236 mm
Db min - Min OR shoulder diameter237 mm
Ca - Min clearance7 mm
Cb - Min clearance9,5 mm
ra max - Max fillet radius3 mm
r1a - Max fillet radius2,5 mm
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