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Single row tapered roller bearings

4T-18690/18620 - NTN

4T-18690/18620

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 diameter46,038 mm
D - External diameter79,375 mm
B - Bearing/Inner ring width17,462 mm
C - Outer ring width13,495 mm
T - Total width17,462 mm
d1 - External diameter inner ring61 mm
a - Charge load application point15,262 mm
Mass0,331 kg
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PRODUCT PERFORMANCE
C - Dynamic load50,5 kN
C0 - Static load56 kN
Cu - Fatigue limit load6,8 kN
A2 - Rating life coefficient1
e - Coefficient0.37
Y0 - Static axial load coefficient0.88
Y2 - Upper axial load coefficient1.6
N lim - Oil lubrication limit speed6200 tr/min
N lim - Grease lubrication limit speed4600 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da max - Max shoulder diameter IR51 mm
db min - Min IR shoulder diameter56 mm
Da max - Max shoulder diameter OR71 mm
Db min - Min OR shoulder diameter74 mm
ra max - Max fillet radius2,8 mm
r1a - Max fillet radius1,5 mm
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