carbide vs. solid carbide? Cheap carbide?
"Jon Elson" wrote in message ... Ed Huntress wrote: g It's too bad that term has stuck. I've talked to a lot of people over the years who don't realize that "solid carbide" actually is a sintered material, with tungsten carbide and tantalum carbide particles cemented together with cobalt and/or other metals. The genesis of the non-solid variety, as far as I know, is that in the beginning, there were cutters made with steel shanks and the cutter was welded on, probably during the sintering process. I know this was true with carbide circuit board drills. I'm sure nobody makes them this way anymore, at least in modest sizes up to a couple inches diameter. Jon I probably still have a few of those kicking around here in 3/4 and 1 inch sizes. --the brazed construction method is still quite common with reamer and router bits as well but usually they're straight flute and not helical. |
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