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Single row tapered roller bearings

4T-30308D - NTN

4T-30308D

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 diameter90 mm
B - Bearing/Inner ring width23 mm
C - Outer ring width17 mm
T - Total width25,25 mm
d1 - External diameter inner ring67 mm
a - Charge load application point29,5 mm
rs - Min fillet radius2 mm
r1s - Min fillet radius1,5 mm
Mass0,727 kg
ISO 355 referenceT7FB040
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PRODUCT PERFORMANCE
C - Dynamic load85,5 kN
C0 - Static load85,5 kN
Cu - Fatigue limit load10,4 kN
A2 - Rating life coefficient1
e - Coefficient0.83
Y0 - Static axial load coefficient0.4
Y2 - Upper axial load coefficient0.73
N lim - Oil lubrication limit speed5200 tr/min
N lim - Grease lubrication limit speed3900 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da max - Max shoulder diameter IR50 mm
db min - Min IR shoulder diameter50 mm
Da min - Min shoulder diameter OR71 mm
Da max - Max shoulder diameter OR81,5 mm
Db min - Min OR shoulder diameter107 mm
Ca - Min clearance3 mm
Cb - Min clearance8 mm
ra max - Max fillet radius2 mm
r1a - Max fillet radius1,5 mm
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