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4T-18790/18720 - NTN

4T-18790/18720

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 diameter50,8 mm
D - External diameter85 mm
B - Bearing/Inner ring width17,462 mm
C - Outer ring width13,495 mm
T - Total width17,462 mm
d1 - External diameter inner ring67 mm
a - Charge load application point16,662 mm
Mass0,375 kg
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PRODUCT PERFORMANCE
C - Dynamic load55 kN
C0 - Static load65 kN
Cu - Fatigue limit load7,9 kN
A2 - Rating life coefficient1
e - Coefficient0.41
Y0 - Static axial load coefficient0.81
Y2 - Upper axial load coefficient1.48
N lim - Oil lubrication limit speed5600 tr/min
N lim - Grease lubrication limit speed4200 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da max - Max shoulder diameter IR56 mm
db min - Min IR shoulder diameter62 mm
Da max - Max shoulder diameter OR77 mm
Db min - Min OR shoulder diameter80 mm
ra max - Max fillet radius3,5 mm
r1a - Max fillet radius1,5 mm
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