Reply by MrRon

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Posted on The carbide puzzle

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5942 posts in 4124 days

#1 posted 11-24-2017 06:14 PM

Carbide used to turn wood will always act as a scraper. Carbide, being a very brittle material cannot hold a knife edge. When carbide is used in metal machining, it relies on high speeds to attain mirror finishes. Scraping and cutting is really the same thing. The difference being in the angle between the tool and the work. HSS tools can be sharpened to a very acute angle, but can’t work at the same speeds carbide can. Carbide is ground at a much less acute angle and so the edge holds up better without fracturing. There are also many different grades of carbide, but sharpness is a trade off for strength.

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