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Single row tapered roller bearings

4T-25880/25820 - NTN

4T-25880/25820

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 diameter36,487 mm
D - External diameter73,025 mm
B - Bearing/Inner ring width24,608 mm
C - Outer ring width19,05 mm
T - Total width23,813 mm
a - Charge load application point15,7 mm
rs - Min fillet radius1,5 mm
r1s - Min fillet radius2,3 mm
Mass0,46 kg
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PRODUCT PERFORMANCE
C - Dynamic load78,5 kN
C0 - Static load85 kN
A2 - Rating life coefficient1
e - Coefficient0.29
Y0 - Static axial load coefficient1.14
Y2 - Upper axial load coefficient2.07
N lim - Oil lubrication limit speed7100 tr/min
N lim - Grease lubrication limit speed5300 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da max - Max shoulder diameter IR42 mm
db min - Min IR shoulder diameter44 mm
Da max - Max shoulder diameter OR68 mm
Db min - Min OR shoulder diameter64 mm
ra max - Max fillet radius1,5 mm
r1a - Max fillet radius2,3 mm
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