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Single row tapered roller bearings

4T-JM738249/JM738210 - NTN

4T-JM738249/JM738210

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 diameter190 mm
D - External diameter260 mm
B - Bearing/Inner ring width44 mm
C - Outer ring width36,5 mm
T - Total width46 mm
d1 - External diameter inner ring227 mm
a - Charge load application point56,9 mm
Mass6,84 kg
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PRODUCT PERFORMANCE
C - Dynamic load405 kN
C0 - Static load720 kN
Cu - Fatigue limit load68,9 kN
A2 - Rating life coefficient1
e - Coefficient0.48
Y0 - Static axial load coefficient0.69
Y2 - Upper axial load coefficient1.26
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 IR200 mm
db min - Min IR shoulder diameter206 mm
Da max - Max shoulder diameter OR242 mm
Db min - Min OR shoulder diameter252 mm
ra max - Max fillet radius3 mm
r1a - Max fillet radius2,5 mm
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