darren01 Posted November 27, 2012 Share Posted November 27, 2012 HI I need to drill some holes in a kit i am building,But the drill bits i have will not work on brass. Can anyone tell me where i can get som small drill bits for brass from , looking for 0.3-0.6mm Thanks All the best Darren Link to post Share on other sites More sharing options...
brossard Posted November 27, 2012 Share Posted November 27, 2012 Good hobby shops should have them. You'll need a pin vice as well. Try: https://www.eileensemporium.com/index.php?option=com_virtuemart&page=shop.browse&category_id=38&Itemid=9 I have some sets of reamers that let you widen existing holes with precision. Make sure to get lots of the smaller sizes - they get dull and frequently snap. Dip the tip in oil to make drilling the hole easier. John Link to post Share on other sites More sharing options...
6959 Posted November 27, 2012 Share Posted November 27, 2012 Any tool, be it a drill, reamer, file or lathe tool used for brass must be very sharp and have zero rake and not too much clearance angle. Straight flute drills and reamers are ideal for brass. The problem with drills made for steel is that they are inclined to snatch and screw themselves into the hole when drilling brass or gunmetal. The remedy is to remove the rake on a drill which is the helix angle. On larger drills used in engineering it is usual to grind a small flat on the front lip at zero degrees. With model engineering sizes a touch with a diamond file will do the trick. Link to post Share on other sites More sharing options...
6959 Posted November 27, 2012 Share Posted November 27, 2012 Spade drills can be cheaper than twist drills and less likely to snatch. The standard drill point is 118 degrees included angle. When drilling thin sheet, making the drill point 90 degrees included can make it less likely to buckle the sheet. Link to post Share on other sites More sharing options...
JeffP Posted November 27, 2012 Share Posted November 27, 2012 I'm sure I've seen somewhere how to make your own spade bits? Link to post Share on other sites More sharing options...
halfwit Posted November 27, 2012 Share Posted November 27, 2012 Get yourself a set of taper broaches, these are used for opening up existing holes and are invaluable for etchy work. As for drills, I bought a microbox for many years ago, some of the drills have been replaced with carbon steel drills over the years. The smaller sizes I buy in packs of 10 Link to post Share on other sites More sharing options...
halfwit Posted November 27, 2012 Share Posted November 27, 2012 There's a thread on pin vices here Darren. Enjoying your High Level RSH build by the way. Link to post Share on other sites More sharing options...
RMweb Premium Siberian Snooper Posted November 27, 2012 RMweb Premium Share Posted November 27, 2012 Hi Darren I but my drills from Eileens Emporium in 10's , They also do pin drills / Vices. https://www.eileense..._id=38&Itemid=9 No connections just a satisfied customer. SS Edit. PS. they also do broaches Link to post Share on other sites More sharing options...
shortliner Posted November 27, 2012 Share Posted November 27, 2012 I buy these 251065529388 (note I very rarely drill Brass) Link to post Share on other sites More sharing options...
craigwelsh Posted November 28, 2012 Share Posted November 28, 2012 I buy these 251065529388 (note I very rarely drill Brass) Anything under 0.7mm in those sets is too poor quality to drill brass. I've had a couple and they normally break as you try to put more pressure on the bit to compensate for a poor cutting edge. I did have one where the fluting had unravelled. I'd recommend UK Drills on eBay as a supplier and also Hong Kong supplied ones such as 140548875658 There used to be sellers doing "German made" 10 packs for about £2.10 inc postage a lot on ebay but I cant find as many of those now. eBay is much cheaper than Eileens for HSS 10 packs and the German/Hong Kong ones last really well even when I do a lot of drilling with the 0.3mm ones in brass or nickel silver kits. Link to post Share on other sites More sharing options...
JeffP Posted November 28, 2012 Share Posted November 28, 2012 does anyone else use the drill bits made for PCB's? they are advertised regularly on ebay, with 2.3mm shanks. Advertised as TCT. Link to post Share on other sites More sharing options...
micknich2003 Posted November 29, 2012 Share Posted November 29, 2012 For quility budget priced drills that work try www.arceurotrade.co.uk They have them in .1mm steps from 0.3mm to 13mm or there about. Also plenty of other good stuff on the website. Mick Nicholson. . Link to post Share on other sites More sharing options...
JeffP Posted November 29, 2012 Share Posted November 29, 2012 Link doesn't work for me? Link to post Share on other sites More sharing options...
smokebox Posted November 29, 2012 Share Posted November 29, 2012 Try this Link to post Share on other sites More sharing options...
micknich2003 Posted November 30, 2012 Share Posted November 30, 2012 www.arceurotrade.co.uk Link to post Share on other sites More sharing options...
Wizard of the Moor Posted November 30, 2012 Share Posted November 30, 2012 An alternative way of making holes in brass sheet is to use a rivetting tool (either a pukka one or your favourite scriber, map tack or WHY) to create a rivet where you want the hole to be. Then turn the sheet over and file off the rivet. Turn the sheet over again and impress the rivet again in the same position. Now turn over and file it off again. Hold the piece up to the light and you will probably see a pinhole has formed. Now carefully repeat the rivetting and filing untl the hole is the size you require. This is a bit long winded compared to drilling, but with a bit of practice you can achieve very precise holes. It's handy when you don't have the correct drill size (normally when I've just broken the last one in the packet), or you want a close fit of an irregularly sized rod into a hole. It's best to start the 'rivet' on the unseen side of the work. Link to post Share on other sites More sharing options...
micknich2003 Posted December 2, 2012 Share Posted December 2, 2012 An alternative way of making holes in brass sheet is to use a rivetting tool (either a pukka one or your favourite scriber, map tack or WHY) to create a rivet where you want the hole to be. Then turn the sheet over and file off the rivet. Turn the sheet over again and impress the rivet again in the same position. Now turn over and file it off again. Hold the piece up to the light and you will probably see a pinhole has formed. Now carefully repeat the rivetting and filing untl the hole is the size you require. This is a bit long winded compared to drilling, but with a bit of practice you can achieve very precise holes. It's handy when you don't have the correct drill size (normally when I've just broken the last one in the packet), or you want a close fit of an irregularly sized rod into a hole. It's best to start the 'rivet' on the unseen side of the work. Works well, I have used same technequie many times. Mick. Link to post Share on other sites More sharing options...
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