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Single row tapered roller bearings

4T-LL639249/LL639210 - NTN

4T-LL639249/LL639210

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 diameter196,85 mm
D - External diameter241,3 mm
B - Bearing/Inner ring width23,017 mm
C - Outer ring width17,462 mm
T - Total width23,812 mm
d1 - External diameter inner ring218,5 mm
a - Charge load application point41,112 mm
Mass2,07 kg
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PRODUCT PERFORMANCE
C - Dynamic load177 kN
C0 - Static load330 kN
Cu - Fatigue limit load31,8 kN
A2 - Rating life coefficient1
e - Coefficient0.42
Y0 - Static axial load coefficient0.79
Y2 - Upper axial load coefficient1.44
N lim - Oil lubrication limit speed1600 tr/min
N lim - Grease lubrication limit speed1200 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da max - Max shoulder diameter IR203 mm
db min - Min IR shoulder diameter205 mm
Da max - Max shoulder diameter OR232 mm
Db min - Min OR shoulder diameter236 mm
ra max - Max fillet radius1,5 mm
r1a - Max fillet radius1,5 mm
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