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Difference between aluminum vs. jig plate aluminum?

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Upon machining aluminum flages I was asked by the shop mechanic would I rather use the jig plate aluminum instead to make the job easier. I didn't know what to tell him, so my question is what is jig plate? More specifically, how is it different from aluminum?

Jason Hall
student - Chicago, IL, U.S.


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I would pose that question back to him. If he's your teacher, he should explain it to you.

T. Beyreis
- Wheeling, Illinois, USA


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I believe (?) jig plate is as-cast, with no further heat-treatment or processing. Any authorities to confirm?

Thomas Jrank
- Stanford, California, USA


May 1, 2008

Jig plate is a carefully cast plate to cause a very fine grained microstructure, fairly uniformly across the thickness of the plate. It is used to make jigs (thus the name)and fixtures because of its exceptional dimensional stability owing of the fine, uniform microstructure.

Ivan Rodriguez
- Richardson, Texas


May 6, 2008

Aluminum Jig Plate: To answer your question... Jig plate is continuous cast and fully stress-relieved aged to full heat condition. The high accuracy finish, ground on both sides, eliminates the need or additional machining.

Frank Lento
- Rancho Cucamonga, California, USA

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