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1. [Amps] drill bits (score: 1): Author: "carl s." <carlseye@tampabay.rr.com>; Date: Mon, 30 Oct 2006 16:37:14 -0500; to all hams who may read this.!! Is there one among us who is a master machinist?? I need someone who can tell me *exactly* what type of drill bit it will take to drill thru a steel plate, 3/8 in. th; /archives//html/Amps/2006-10/msg00305.html (6,492 bytes)
2. Re: [Amps] drill bits (score: 1): Author: "Clint Talmadge" <unclebudd@bellsouth.net>; Date: Mon, 30 Oct 2006 15:59:56 -0600; To drill a 1/2" hole, start with a smaller size and work up in size. The smaller drills will often have a much easier time with the harder material due to less heat build up. As you step up the actua; /archives//html/Amps/2006-10/msg00306.html (7,918 bytes)
3. Re: [Amps] drill bits (score: 1): Author: "Robert B. Bonner" <rbonner@qro.com>; Date: Mon, 30 Oct 2006 16:05:26 -0600; WOW Carl, while not a master machinist I have run into this issue before. If your plate is hardened you have an issue drilling it in the first place. First you need to chuck up smaller drill to make; /archives//html/Amps/2006-10/msg00307.html (8,385 bytes)
4. Re: [Amps] drill bits (score: 1): Author: "Dan Hearn" <dhearn@air-pipe.com>; Date: Mon, 30 Oct 2006 15:00:55 -0800; Clint is right. A machinist once told me that it is common to not put enough force on the drill. If you are not making chips you need more pressure. A drill which is not cutting is overheating, parti; /archives//html/Amps/2006-10/msg00309.html (8,932 bytes)
5. [Amps] drill bits (score: 1): Author: "Doug Charette" <paintedgun@ecewb.com>; Date: Mon, 30 Oct 2006 21:11:56 -0600; Carl, I'm not a machinist.but I am a practicing gunsmith. If you haven't been able to go through it with a normal drill you are: (A) probably not able to exert enough pressure on the drill (use a dri; /archives//html/Amps/2006-10/msg00316.html (8,002 bytes)
6. [Amps] Drill bits (score: 1): Author: "Rich & DJ" <rdj@wildblue.net>; Date: Mon, 30 Oct 2006 21:31:15 -0600; Date: Mon, 30 Oct 2006 16:37:14 -0500 Several people said step up a little at a time and use oil , all good ways. One more thing , make sure the drill bit has a 135 degree grind on it , most are 118; /archives//html/Amps/2006-10/msg00317.html (8,173 bytes)
7. Re: [Amps] Drill bits (score: 1): Author: "Will Matney" <craxd1@verizon.net>; Date: Mon, 30 Oct 2006 22:46:24 -0500; Another thing is to use a center drill to start the hole for the small bit. This is the same center drill you use in a lathe or on a mill. It has a 60 degree angle. Some steel has a case hardening, o; /archives//html/Amps/2006-10/msg00318.html (10,285 bytes)
8. Re: [Amps] drill bits (score: 1): Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>; Date: Mon, 30 Oct 2006 23:35:22 +0100 (CET); I've had some success using carbide tipped masonry drills on hardened steel. But they need a fair amount of power, so, as everyone else says, start small and work up. If they won't touch it, oxy-acet; /archives//html/Amps/2006-10/msg00320.html (7,630 bytes)
9. Re: [Amps] drill bits (score: 1): Author: "Mike Schatzberg" <cherokeehillfarm@earthlink.net>; Date: Tue, 31 Oct 2006 06:57:21 -0500; A clean solution might be to find a small shop with an EDM machine and let them locate and machine the holes. 73 and Happy DXing, Mike W2AJI -- Original Message -- From: "Peter Chadwick" <g3rzp@g3rzp; /archives//html/Amps/2006-10/msg00322.html (8,278 bytes)
10. Re: [Amps] drill bits (score: 1): Author: "wc6w@juno.com" <wc6w@juno.com>; Date: Tue, 31 Oct 2006 16:25:03 GMT; Instead of cutting oil, try Beolube. Also works great for tapping holes. 73 & Good morning, Marv WC6W * ________________________________________________________________________ Try Juno Platinum for; /archives//html/Amps/2006-10/msg00323.html (7,606 bytes)
11. Re: [Amps] drill bits (score: 1): Author: W2RU - Bud Hippisley <W2RU@frontiernet.net>; Date: Wed, 01 Nov 2006 00:04:55 +0000; This is not a "drilling steel" question, it's a "drilling aluminum" one. I have a Sears drill press, and can vary the speed, as needed. Can someone tell me how to drill small holes (for pots, 1/8-inc; /archives//html/Amps/2006-10/msg00324.html (7,876 bytes)
12. Re: [Amps] drill bits (score: 1): Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>; Date: Wed, 1 Nov 2006 02:21:13 +0100 (CET); Bud asked: Can someone tell me how to drill small holes (for pots, 1/8-inch phone jacks, RCA phono jacks, etc.) in typical small aluminum chassis (plural) so that the holes aren't triangular?< Firstl; /archives//html/Amps/2006-10/msg00326.html (9,246 bytes)
13. Re: [Amps] drill bits (score: 1): Author: Doug Renwick <ve5ra@sasktel.net>; Date: Tue, 31 Oct 2006 19:26:41 -0600; Use a step drill bit. Doug/VA5DX This is not a "drilling steel" question, it's a "drilling aluminum" one. I have a Sears drill press, and can vary the speed, as needed. Can someone tell me how to dri; /archives//html/Amps/2006-10/msg00327.html (8,528 bytes)
14. Re: [Amps] drill bits (score: 1): Author: "Mike, K6BR" <noddy1211@sbcglobal.net>; Date: Tue, 31 Oct 2006 17:54:49 -0800; They are a little expensive, but this is the way to go. You get nice round holes. I try to drill from both sides which is a help. You can get step drill bits from good old Harbor Freight cheaply. Mik; /archives//html/Amps/2006-10/msg00328.html (9,031 bytes)
15. Re: [Amps] drill bits (score: 1): Author: "Robert B. Bonner" <rbonner@qro.com>; Date: Tue, 31 Oct 2006 21:43:36 -0600; I think its time to use the Torch Instead may I recommend an ARC WELDER? OK so this CBer I was working "with" in the olden days starts telling me a story. It was 1971 and he had just bought a new to; /archives//html/Amps/2006-10/msg00329.html (11,170 bytes)
16. Re: [Amps] drill bits (score: 1): Author: Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk>; Date: Wed, 1 Nov 2006 06:55:51 +0100 (CET); Step bits have their uses, but they don't always have the right size steps.............. they're expensive too, compared with using G clamps to hold things on the drill table. And to cause confusion,; /archives//html/Amps/2006-11/msg00001.html (6,569 bytes)
17. Re: [Amps] drill bits (score: 1): Author: Doug Renwick <ve5ra@sasktel.net>; Date: Thu, 02 Nov 2006 09:12:15 -0600; Step bits are relatively cheap when you consider you can get up to 13 drill bit sizes in one step bit. Doug/VA5DX They are a little expensive, but this is the way to go. You get nice round holes. I t; /archives//html/Amps/2006-11/msg00034.html (7,227 bytes)

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