Macor ®

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Macor ® is a machinable glass ceramic made by Corning Incorporated, distributed and fabricated by Astro Met. It is available in rod, bar, and sheet stock shapes, or as precision fabricated parts in production or prototype quantities.

Machinable with ordinary metalworking tools

High dielectric strength

Superior vacuum tightness

Strong and dimensionally stable

Useful to 1000°C, 1800°F

Good chemical resistance

Macor is a machinable glass-ceramic material with a unique combination of useful properties. A product of Corning Incorporated, it is stocked, distributed and fabricated by Astro Met, Inc.

High dielectric strength makes Macor an excellent insulator. No out-gasing, essentially zero porosity and low helium permeation make it useful in vacuum applications. Because it is thermally stable and has thermal expansion characteristics similar to metals, it can be used where high heat and flame are problems. It can be sealed, metallized and brazed.

Macor can be turned, milled, drilled, tapped, sawed and ground by ordinary metalworking tools and techniques. It is machined with high-speed steel or, more easily, with carbide tooling at relatively low speeds and feeds, but with greater depth of cut than is usual with metals. Use of a water-soluble coolant is recommended. The "chips" are a fine powder, easily controlled by coolant or vacuum.

Because Macor is so readily machined, it is a cost effective material for small volume manufacturing and for developing ceramic prototypes which in production are made by pressing and sintering large quantities. It has been used for nozzles, sensor housings, bearings, fixtures, guides, electrical insulators, thermal isolators and numerous other applications where the unique technical properties of Macor provide a solution to a challenging materials problem. Astro Met manufactures such parts to customer specifications (with tolerances as tight as .0005") and is able to provide limited prototype components as well as production quantities.

 

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Astro Met, Inc.
9974 Springfield Pike
Cincinnati, OH 45215
Phone: 513-772-1242
Fax: 513-772-9080

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