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Single row tapered roller bearings

4T-1280/1220 - NTN

4T-1280/1220

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.

This kit contains the following reference(s)

Documentation

Product information

PRODUCT DEFINITION
BrandNTN
d - Internal diameter22,225 mm
D - External diameter57,15 mm
B - Bearing/Inner ring width22,225 mm
C - Outer ring width17,462 mm
T - Total width22,225 mm
d1 - External diameter inner ring39,5 mm
a - Charge load application point15,125 mm
Mass0,287 kg
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PRODUCT PERFORMANCE
C - Dynamic load52,5 kN
C0 - Static load49,5 kN
Cu - Fatigue limit load6 kN
A2 - Rating life coefficient1
e - Coefficient0.35
Y0 - Static axial load coefficient0.95
Y2 - Upper axial load coefficient1.73
N lim - Oil lubrication limit speed9500 tr/min
N lim - Grease lubrication limit speed7100 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da max - Max shoulder diameter IR29 mm
db min - Min IR shoulder diameter29,5 mm
Da max - Max shoulder diameter OR49 mm
Db min - Min OR shoulder diameter52 mm
ra max - Max fillet radius0,8 mm
r1a - Max fillet radius1,5 mm
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