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A Short Time For A Long Project

You can’t make a silk purse out of a sow’s ear but when it comes to engineering technical ceramics, you can make a much longer rod than the standard sizes of raw material normally allow.

Precision Ceramics recently received an enquiry from a US Customer for a furnace shaft which, because of high temperature and aggressive operating conditions, needed to be manufactured from Macor Machinable Glass Ceramic. The shaft required was 1” in diameter and 23” long. The only problem for Precision Ceramics – the UK’s principal UK distributor of Macor – was that the raw material is cast and delivered in maxi-slabs which are only 12” square.

After considering the most practical way to solve this problem, it was decided to manufacture the shaft in three separate pieces and join them together by means of a screw thread. In this way a shaft length of 23” could be easily achieved.

Machine Operator Jacob Facer was tasked with the project and by machining a series of  ¾” -16 UNF threads. The three pieces of the shaft screwed together seamlessly and the customer was delighted with the end-product.


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