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A4050/A4138

Inch Design Tapered Roller Bearings
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Parts Number
A4050/A4138 Inch Series Tapered Roller Bearings
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Display units

Parts Number

A4050/A4138

Boundary Dimensions

d 12.7 mm Bore diameter
D 34.988 mm Outside diameter
T 10.998 mm Total width
B 10.988 mm Width of inner ring
C 8.73 mm Width of outer ring
Cup r (min.) 1.3 mm Chamfer dimension of outer ring (Cup)
Cone r (min.) 1.3 mm Chamfer dimension of inner ring (Cone)

Basic Load Ratings

Cr 14400 N Basic dynamic load rating
C0r 10900 N Basic static load rating

Speeds

Grease 12000 min-1 Grease lubrication
Oil (Oil-bath) 16000 min-1 Oil-bath lubrication

Dimensions

a 8.2 mm Effective load center

Abutment and Fillet Dimensions

da 18.5 mm Diameter of shaft abutment
Da 29 mm Diameter of housing abutment
db 17 mm Diameter of shaft abutment
Db 32 mm Diameter of housing abutment
ra (max.) 1.3 mm Radius of shaft or housing fillet of inner ring
ra (max.) 1.3 mm Radius of shaft or housing fillet of outer ring

Calculation factors

e 0.45 Constant
Y0 0.73 Axial load Factors
Y1 1.3 Axial load Factors

Mass

CONE (approx.) 0.033 kg
CUP (approx.) 0.022 kg
CAD
More Information
NSK Product Type2 TRBSR_ID
NSK Product Type Bearing
Designations A4050/A4138

© NSK Ltd.

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