Sunday 1 November 2009

What tools do I need? (part 6 Sharpening)




While on a recent visit to a friend of mine, who lives a little further south of here in the Creuse, he took me to see an archaeological site he has discovered. It was here on an escarpment that we discovered this very early sharpening stone; probably used to sharpen all manner of tools and weapons. No doubt even battle weapons used against invading Romans; there are some traces of later Roman settlement. Interesting to see how little some things have changed, although now-days most of us would like our sharpening stones a little more portable.

Last time I promised to look at diamond and ceramic stones, these are in my opinion, by far the best choice. Both will do a similar job, but there are a few differences. Generally speaking diamond stones are a perforated metal plate covered with diamond particles of different grades. Course, medium, fine and extra fine, there is also an extra course though difficult to find. This plate is bonded to a support or base, generally plastic and colour coded to the grit size. Ceramic stones are made from high alumina ceramic (synthetic sapphires) and then bonded into a ceramic base, which is then fired at temperatures in the region of 3000 degrees.

Ceramic stones have a continuous surface, so are especially suited to fine narrow blades. Diamond stones not of the best quality, can be found reasonably inexpensively, where as ceramic stones are about the same price as the best diamond stones. You will never find a one stone fits all, like the old monster above. Therefore, as it is our intention to get woodworking quickly and inexpensively, I would recommend at the very least a cheapish diamond combination stone; coarse/fine and a medium fine ceramic stone. (Med fine ceramic stone is equal to an extra fine diamond stone)






Diamond and Ceramic Stones

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