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68450/68709

Inch Design Tapered Roller Bearings
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Parts Number
68450/68709 Inch Series Tapered Roller Bearings
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Display units

Parts Number

68450/68709

Boundary Dimensions

d 114.3 mm Bore diameter
D 180 mm Outside diameter
T 34.925 mm Total width
B 31.75 mm Width of inner ring
C 25.4 mm Width of outer ring
Cup r (min.) 0.8 mm Chamfer dimension of outer ring (Cup)
Cone r (min.) 3.5 mm Chamfer dimension of inner ring (Cone)

Basic Load Ratings

Cr 214000 N Basic dynamic load rating
C0r 254000 N Basic static load rating

Speeds

Grease 1800 min-1 Grease lubrication
Oil (Oil-bath) 2400 min-1 Oil-bath lubrication

Dimensions

a 40 mm Effective load center

Abutment and Fillet Dimensions

da 130 mm Diameter of shaft abutment
Da 165 mm Diameter of housing abutment
db 123 mm Diameter of shaft abutment
Db 172 mm Diameter of housing abutment
ra (max.) 3.5 mm Radius of shaft or housing fillet of inner ring
ra (max.) 0.8 mm Radius of shaft or housing fillet of outer ring

Calculation factors

e 0.5 Constant
Y0 0.66 Axial load Factors
Y1 1.2 Axial load Factors

Mass

CONE (approx.) 1.95 kg
CUP (approx.) 1 kg
CAD
More Information
NSK Product Type2 TRBSR_ID
NSK Product Type Bearing
Designations 68450/68709

© NSK Ltd.

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