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Single row tapered roller bearings

4T-12580/12520 - NTN

4T-12580/12520

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 diameter20,638 mm
D - External diameter49,225 mm
B - Bearing/Inner ring width19,845 mm
C - Outer ring width15,875 mm
T - Total width19,845 mm
d1 - External diameter inner ring34,3 mm
a - Charge load application point12,745 mm
Mass0,183 kg
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PRODUCT PERFORMANCE
C - Dynamic load41,5 kN
C0 - Static load39 kN
Cu - Fatigue limit load4,75 kN
A2 - Rating life coefficient1
e - Coefficient0.32
Y0 - Static axial load coefficient1.02
Y2 - Upper axial load coefficient1.86
N lim - Oil lubrication limit speed11000 tr/min
N lim - Grease lubrication limit speed8200 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da max - Max shoulder diameter IR26 mm
db min - Min IR shoulder diameter28,5 mm
Da max - Max shoulder diameter OR42,5 mm
Db min - Min OR shoulder diameter45,5 mm
ra max - Max fillet radius1,5 mm
r1a - Max fillet radius1,5 mm
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