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1.1mm hole in brass

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Tomfilery	16/07/2018 11:54:11
144 forum posts 4 photos	Paul, Don't over think it and get hung up on it! Just do it. With small drills you have to make sure the swarf clears, so pull it back regularly. It seems that the "conventional wisdom" is for sub-millimeter (or thereabouts) drilling to be done at ridiculously fast speeds, but I think people get mixed up with drilling printed circuit boards where the material demands high speed. I have just finished making a dozen components where each had 6x 1mm holes through them (3/16" square brass) with no drama. DO NOT try to do it in one go, similarly, pecking isn't necessary - just ensure the swarf clears and doesn't jam the drill. If you do break the drill in the hole soak the brass in citric acid overnight and you should be able to get the (now corroded) drill out with a needle, or similar. Regards Tom
SillyOldDuffer	16/07/2018 12:38:42
10668 forum posts 2415 photos	Posted by Steve Crow on 15/07/2018 18:38:17: Albion Alloys make micro brass and nickel silver tubing with a 0.1mm wall. You can get it from Chronos and others. They make a 0.5 OD x 0.3 ID - three foot long lengths for 6 quid. This isn't even their smallest! They also sell selection bags of telescoping sizes. Could you use it as bushing for your existing 0.5 holes? I've used this stuff in all different sizes as bushes etc. Thanks Steve, I've ordered some! Dave
Paul Ainsworth	17/07/2018 11:36:57
97 forum posts 15 photos	I managed to do them with only one more broken drill, then I changed plans and decided to purchase a BA tap and die set so they may need drilling out depending on what size I go with.

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