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745A/742

Inch Design Tapered Roller Bearings
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Parts Number
745A/742 Inch Series Tapered Roller Bearings
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Display units

Parts Number

745A/742

Boundary Dimensions

d 69.85 mm Bore diameter
D 150.089 mm Outside diameter
T 44.45 mm Total width
B 46.672 mm Width of inner ring
C 36.512 mm Width of outer ring
Cup r (min.) 3.3 mm Chamfer dimension of outer ring (Cup)
Cone r (min.) 3.5 mm Chamfer dimension of inner ring (Cone)

Basic Load Ratings

Cr 325000 N Basic dynamic load rating
C0r 370000 N Basic static load rating

Speeds

Grease 2400 min-1 Grease lubrication
Oil (Oil-bath) 3200 min-1 Oil-bath lubrication

Dimensions

a 32.5 mm Effective load center

Abutment and Fillet Dimensions

da 88 mm Diameter of shaft abutment
Da 134 mm Diameter of housing abutment
db 82 mm Diameter of shaft abutment
Db 142 mm Diameter of housing abutment
ra (max.) 3.5 mm Radius of shaft or housing fillet of inner ring
ra (max.) 3.3 mm Radius of shaft or housing fillet of outer ring

Calculation factors

e 0.33 Constant
Y0 1 Axial load Factors
Y1 1.8 Axial load Factors

Mass

CONE (approx.) 2.82 kg
CUP (approx.) 1.07 kg
CAD
More Information
NSK Product Type2 TRBSR_ID
NSK Product Type Bearing
Designations 745A/742

© NSK Ltd.

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