Polistar0 pages

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More brilliant grinding with Polistar.

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The new POLISTAR product line guarantees high-quality surfaces for grooved tools.

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The finest abrasive grit sizes and a fast-cutting hybrid bond coupled with the 75 years of Diametal

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AG expertise makes this possible.

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The inquiries are steadily growing in number. Moreover,

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the demands of the industry processing non-ferrous

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and light metals as well as plasties are clear: the sur-

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faces of grooved tools that are precision ground before

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and afterwards have to satisfy the highest of require-

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ments. The challenge here is: how can it be effectively

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achieved that the milling or boring tools are produced

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in such a way that the spiral groove manifests a surface

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quality of Ra <0.05, i.e. practically high-gloss polished?

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As is well known, ultra-precision grinding wheels are

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generally only capable of mastering measurements of

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from around 20 to 50 microns.

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This is where Diametal comes in with POLISTAR. With

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the new product line, the narrow tolerance stipula-

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tions of a series production run can be observed. This

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is made possible thanks to a successful combination of

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ultrafine abrasive grit sizes, embedded in an extremely

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fast-cutting hybrid bond. In this way, spiral grooves can

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be brought to shine - and with a depth of cut of 0.2

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to 0.5 mm. Nevertheless, feed rates in the region of

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150 mm/min are still thoroughly feasible. The increase The POLISTAR products line is not only convincing in

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of the grinding allowance from a few hundredths of a terms of its cutting rate but also has an astonishing

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millimetre to up to 5 tenths of a millimetre consider- profile stability. That allows a long deployment of the

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ably extends the manufacturing dimensions in rough POLISTAR disk without it having to be re-profiled. The

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grinding. As a result, the operating time of the roughing POLISTAR product line has been primarily conceived

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wheel is also increased. The higher infeed depths also for use with oil cooling, but the solution with emulsion

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reduce the danger of rough grinding traces remaining cooling has also proved its worth, as many tests have

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when polishing. shown.

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www.diametal.com

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DIAMETAL AG/SA

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Solothurnstrasse 136 ■ 2500 CH-Biel/Bienne 6

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Tel +41 (0)32 344 33 33 ■ Fax +41 (0)32 344 33 44

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info@diametal.ch ■ www.diametal.com

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