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Single row tapered roller bearings

4T-2878/2820 - NTN

4T-2878/2820

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.

Documentation

Product information

PRODUCT DEFINITION
BrandNTN
d - Internal diameter34,925 mm
D - External diameter73,025 mm
B - Bearing/Inner ring width23,812 mm
C - Outer ring width17,462 mm
T - Total width22,225 mm
d1 - External diameter inner ring54 mm
a - Charge load application point16,725 mm
Mass0,435 kg
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PRODUCT PERFORMANCE
C - Dynamic load69,5 kN
C0 - Static load75,5 kN
Cu - Fatigue limit load9,2 kN
A2 - Rating life coefficient1
e - Coefficient0.37
Y0 - Static axial load coefficient0.9
Y2 - Upper axial load coefficient1.63
N lim - Oil lubrication limit speed7000 tr/min
N lim - Grease lubrication limit speed5200 tr/min
Tmin - Min operating temperature-40 °C
Tmax - Max operating temperature120 °C
ABUTMENT
da max - Max shoulder diameter IR41 mm
db min - Min IR shoulder diameter42 mm
Da max - Max shoulder diameter OR63 mm
Db min - Min OR shoulder diameter68 mm
ra max - Max fillet radius0,8 mm
r1a - Max fillet radius3,3 mm
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