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53256XU

Single-Direction Thrust Ball Bearings
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Images shown are representations. Designs and specifications may differ from actual products.
Parts Number
53256XU Single-Direction Thrust Ball Bearings
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Parts Number

53256XU

Boundary Dimensions

d 280 mm Bore diameter
D 380 mm Outside diameter
T,T3 85 mm Height
T4 94 mm Height bearing include seat washer
r (min.) 2.1 mm Chamfer dimension

Basic Load Ratings

Ca 450000 N Basic dynamic load rating
C0a 1950000 N Basic static load rating

Speeds

Grease 530 min-1 Grease lubrication
Oil (Oil-bath) 800 min-1 Oil-bath lubrication

Dimensions

A 143 mm Centre height housing washer sphere
R 280 mm Radius sphered housing washer
b 31 mm Height sphered housing washer
D2 325 mm Inner diameter sphered seat washer
d1 375 mm Outside diameter shaft washer
D3 390 mm Outside diameter sphered housing washer
D1 284 mm Inner diameter housing washer

Abutment and Fillet Dimensions

da (min.) 339 mm Diameter of shaft abutment
Da (max.) 321 mm Diameter of housing abutment
ra (max.) 2 mm Radius of shaft or housing fillet

Mass

(approx.) 37 kg
Designations Boundary Dimensions Basic Load Ratings Tolerance Class Limiting Speeds Mass
d
(mm)		 D
(mm)		 T,T3
(mm)		 T4
(mm)		 Ca
(N)		 C0a
(N)		 Grease
(min-1)		 Oil (Oil-bath)
(min-1)		 (approx.)
(kg)
53256XU 280 380 85 94 450000 1950000 ISO NORMAL CLASS 530 800 37

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Not to scale.
(*) The chamfer dimensions are minimum values.
For heavy load applications, ensure that the da value chosen is large enough to support the shaft washer rib.

CAD

© NSK Ltd.

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