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Posted on How do you identify good steel from bad in tools like drill bits

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389 posts in 1991 days

#1 posted 12-15-2012 03:28 AM

pulled out one of the antique 7/16 inch spade bits tonight cause I needed to drill 4 holes thru 2 2×8’s I had married together with some kreg screws for another project, and dispite the fact the bit was kind of funky looking, pitted, has whiteish corrosion on it, and some traces of rust, wonder what that white stuff is, anyway it still cut thru those 2×8s with ease. Definately a argument for cleaning and sharpening these old antique bits. I bought me a wire brush for my bench grinder couple months ago, think i’ll install it gonna go to town on them with it. Next time I go to the library I’m also going to look up about how to sharpen spade bits. Seems like it should be easy from looking at them. Drill doctor is worthy consideration, but I also have a dremel tool that might be able to do the job. Anyone ever use those for that?

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