51256X

Single-Direction Thrust Ball Bearings

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Parts Number
51256X Single-Direction Thrust Ball Bearings			Add to Compare You can use this service by registering as a member.

Product Information

Display units Metric Imperial

Parts Number

51256X

Boundary Dimensions

d	280	mm	Bore diameter
D	380	mm	Outside diameter
T,T3	80	mm	Height
r (min.)	2.1	mm	Chamfer dimension

Basic Load Ratings

C_a	450000	N	Basic dynamic load rating
C_0a	1950000	N	Basic static load rating

Speeds

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

Dimensions

d1	375	mm	Outside diameter shaft 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.)

27.1

Drawing for Reference

Designations	Boundary Dimensions				Basic Load Ratings		Tolerance Class	Limiting Speeds		Mass
Designations	d (mm)	D (mm)	T,T3 (mm)	T4 (mm)	C_a (N)	C_0a (N)	Tolerance Class	Grease (min^-1)	Oil (Oil-bath) (min^-1)	(approx.) (kg)
51256X	280	380	80		450000	1950000	ISO NORMAL CLASS	530	800	27.1

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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

FAQs (2)

Customer Questions

How are axial load and thrust load different?

Axial load and thrust load are different words for the same concept: They both refer to loads parallel to the axis of the shaft.

Can thrust ball bearings take radial loads?

No, thrust ball bearings cannot take radial loads.

51256X

Parts Number

Boundary Dimensions

Basic Load Ratings

Speeds

Dimensions

Abutment and Fillet Dimensions

Mass

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