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3994/3920

Inch Design Tapered Roller Bearings
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Parts Number
3994/3920 Inch Series Tapered Roller Bearings
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Display units

Parts Number

3994/3920

Boundary Dimensions

d 66.675 mm Bore diameter
D 112.712 mm Outside diameter
T 30.162 mm Total width
B 30.048 mm Width of inner ring
C 23.812 mm Width of outer ring
Cup r (min.) 3.2 mm Chamfer dimension of outer ring (Cup)
Cone r (min.) 5.5 mm Chamfer dimension of inner ring (Cone)

Basic Load Ratings

Cr 147000 N Basic dynamic load rating
C0r 173000 N Basic static load rating

Speeds

Grease 3200 min-1 Grease lubrication
Oil (Oil-bath) 4300 min-1 Oil-bath lubrication

Dimensions

a 25.5 mm Effective load center

Abutment and Fillet Dimensions

da 84 mm Diameter of shaft abutment
Da 99 mm Diameter of housing abutment
db 74 mm Diameter of shaft abutment
Db 106 mm Diameter of housing abutment
ra (max.) 5.5 mm Radius of shaft or housing fillet of inner ring
ra (max.) 3.2 mm Radius of shaft or housing fillet of outer ring

Calculation factors

e 0.4 Constant
Y0 0.82 Axial load Factors
Y1 1.5 Axial load Factors

Mass

CONE (approx.) 0.706 kg
CUP (approx.) 0.454 kg
CAD
More Information
NSK Product Type2 TRBSR_ID
NSK Product Type Bearing
Designations 3994/3920

© NSK Ltd.

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