Call: 800.221.0419
Fax: 603.434.7880
(info@alcumet.com)

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AlCuMet Inc.
3 Planeview Drive
Londonderry, NH 03053

Toll Free: 800.221.0419
Call: 603.432.6220
Fax: 603.434.7880

Email: (info@alcumet.com)

Investment Casting Concentricity

Any two cylindrical surfaces sharing a common point or axis as their center are concentric. Any dimensional difference in the location of one center with another is the extent of the concentricity.

Concentricity

The illustration above shows out of roundness in either diameter does not affect concentricity because concentricity is determined by the centers or axis. Out of roundness is variance from a true circle. In a shaft or tube, straightness does not influence concentricity.

Concentricity

Diameters A and B may be true circles, but the out of straightness affects concentricity.

Concentricity

When the length of a bar or tube is not more than 2 times its component diameters, the diameters will be concentric within .005" per 1" of separation.

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