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4T-25580/25520 - NTN

4T-25580/25520

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 diameter44,45 mm
D - External diameter82,931 mm
B - Bearing/Inner ring width25,4 mm
C - Outer ring width19,05 mm
T - Total width23,812 mm
d1 - External diameter inner ring63 mm
a - Charge load application point17,612 mm
Mass0,56 kg
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PRODUCT PERFORMANCE
C - Dynamic load84,5 kN
C0 - Static load98 kN
Cu - Fatigue limit load12 kN
A2 - Rating life coefficient1
e - Coefficient0.33
Y0 - Static axial load coefficient0.99
Y2 - Upper axial load coefficient1.79
N lim - Oil lubrication limit speed6000 tr/min
N lim - Grease lubrication limit speed4500 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 diameter57 mm
Da max - Max shoulder diameter OR74 mm
Db min - Min OR shoulder diameter77 mm
ra max - Max fillet radius3,5 mm
r1a - Max fillet radius0,8 mm
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