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78250/78537

Inch Design Tapered Roller Bearings
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Parts Number
78250/78537 Inch Series Tapered Roller Bearings
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Display units

Parts Number

78250/78537

Boundary Dimensions

d 63.5 mm Bore diameter
D 136.525 mm Outside diameter
T 36.512 mm Total width
B 33.236 mm Width of inner ring
C 23.52 mm Width of outer ring
Cup r (min.) 3.3 mm Chamfer dimension of outer ring (Cup)
Cone r (min.) 2.3 mm Chamfer dimension of inner ring (Cone)

Basic Load Ratings

Cr 187000 N Basic dynamic load rating
C0r 183000 N Basic static load rating

Speeds

Grease 2600 min-1 Grease lubrication
Oil (Oil-bath) 3600 min-1 Oil-bath lubrication

Dimensions

a 44.2 mm Effective load center

Abutment and Fillet Dimensions

da 85 mm Diameter of shaft abutment
Da 115 mm Diameter of housing abutment
db 79 mm Diameter of shaft abutment
Db 130 mm Diameter of housing abutment
ra (max.) 2.3 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 0.87 Constant
Y0 0.38 Axial load Factors
Y1 0.69 Axial load Factors

Mass

CONE (approx.) 1.51 kg
CUP (approx.) 0.782 kg
CAD
More Information
NSK Product Type2 TRBSR_ID
NSK Product Type Bearing
Designations 78250/78537

© NSK Ltd.

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