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Single row tapered roller bearings

4T-344/332 - NTN

4T-344/332

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 diameter40 mm
D - External diameter80 mm
B - Bearing/Inner ring width22,403 mm
C - Outer ring width17,826 mm
T - Total width21 mm
d1 - External diameter inner ring58,5 mm
a - Charge load application point14,4 mm
Mass0,479 kg
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PRODUCT PERFORMANCE
C - Dynamic load75,5 kN
C0 - Static load75 kN
Cu - Fatigue limit load9,1 kN
A2 - Rating life coefficient1
e - Coefficient0.27
Y0 - Static axial load coefficient1.21
Y2 - Upper axial load coefficient2.2
N lim - Oil lubrication limit speed6300 tr/min
N lim - Grease lubrication limit speed4700 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da max - Max shoulder diameter IR45,5 mm
db min - Min IR shoulder diameter52 mm
Da max - Max shoulder diameter OR73 mm
Db min - Min OR shoulder diameter75 mm
ra max - Max fillet radius3,5 mm
r1a - Max fillet radius1,3 mm
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