No problem Frank, in fact I often use numbered drill bits in the custom wooden models I make. The drills work really well at grabbing the carbon and soot of cutting operations and pulling it out of the torch tip, while the cheaper versions of wire abrasive just push the debris inside the torch tip.īy the way, if you can figure out how to resharpen these numbered drill bits, you are a better machinist than I am Not the typical torch tip cleaners with a piece of abrasive covered wire mind you, but the more expensive torch tip cleaners that are basically hand drills. I use the small drill bits to clean the tiny holes in a cutting torch tip. Orginally they were for the drilling of jets and ports in carburetors and injector nozzels. Basically it is hinged so that you feel the slightest of pressure, because it would not take much to break the bit otherwise.īy the way, as a Railroad Machinist, I use these small bits all the time. You are also supposed to use a special drill press handle. In fact, they are so small, when using them, there is a special chuck that is mounted to the drill press to hold such a small drill. For most charts, drill bit numbers run from 1-80, which in and of itself, is pretty darn small. Here is another stab.ĭrill bit numbers really do go 1-100 Randy, though I had to find this out from some old railroad machinist books my Grandfather gave me that were published in 1942. Yep, I was afraid I did not explain myself very well.
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