- 1. breaking off a tap?! (score: 1)
- Author: nicholas harteau <nrh@ikami.com>
- Date: Mon, 3 Mar 2003 18:15:20 -0600
- I can't even believe it. I was tapping some threads into what basically amounts to aluminum stock (an aftermarket upper tailgate for my truck) and I broke the lovely tap off inside the pillar! Not on
- /html/shop-talk/2003-03/msg00016.html (7,870 bytes)
- 2. Re: breaking off a tap?! (score: 1)
- Author: "Keith Turk" <kturk@ala.net>
- Date: Mon, 3 Mar 2003 18:29:05 -0600
- couple of ideas actually...... first try a pair of needle nose pliers to back it out.... it you can't get to it with them try a pick or an awl.... the deal is they are much easier coming out then goi
- /html/shop-talk/2003-03/msg00017.html (8,903 bytes)
- 3. Re: breaking off a tap?! (score: 1)
- Author: Chris Kantarjiev <cak@dimebank.com>
- Date: Mon, 3 Mar 2003 16:53:05 -0800 (PST)
- There are specialty tools for removing taps - they have multiple fingers that reach down the relief slots of the tap, allowing you to turn it. I seem to recall that nitric acid will dissolve the stee
- /html/shop-talk/2003-03/msg00018.html (8,063 bytes)
- 4. Re: breaking off a tap?! (score: 1)
- Author: Eric Murray <ericm@lne.com>
- Date: Mon, 3 Mar 2003 17:27:39 -0800
- Put a steel nut with the appropriate sized hole over the hole in the aluminum, and use a mig welder weld the nut to the end of the tap. I have not tried this one myself, but others have reported succ
- /html/shop-talk/2003-03/msg00021.html (8,573 bytes)
- 5. RE: breaking off a tap?! (score: 1)
- Author: "Gerald Brazil" <gerrybraz@voyager.net>
- Date: Mon, 3 Mar 2003 20:28:44 -0500
- Yes, there are a number of things to do.... Go to a professional machine tool place like Production Tool or Enco and buy a can of Tap Magic for aluminum....(you should have been using it when you bro
- /html/shop-talk/2003-03/msg00022.html (9,868 bytes)
- 6. Re: breaking off a tap?! (score: 1)
- Author: Todd Walke <racertod@racertodd.com>
- Date: Mon, 03 Mar 2003 18:26:13 -0800
- Do a Google.com search on "tap extractors" and you'll get a bunch of hits for companies that sell tools to extract a broken tap. Here is one if you want to see what they look like: http://www.waltont
- /html/shop-talk/2003-03/msg00026.html (9,219 bytes)
- 7. Re: breaking off a tap?! (score: 1)
- Author: Steve Shipley <shiples@attbi.com>
- Date: Tue, 04 Mar 2003 22:49:33 -0800
- It's a more extensive subject than I can convey in one post, but here's some stuff that might be relevant. What kind of tap were you using? I'm reading Machine Tool Practices for my class and I was p
- /html/shop-talk/2003-03/msg00029.html (10,302 bytes)
- 8. Breaking off a tap?! (score: 1)
- Author: Derek <dereklola@yahoo.com>
- Date: Wed, 5 Mar 2003 07:33:24 -0800 (PST)
- I recently needed a half inch deep 10-32 tapped hole in the head end of an 7/16 Allen bolt. The tapping would start OK (the inside of an Allen bolt isn't all that hard) but at about 3/8 deep it would
- /html/shop-talk/2003-03/msg00030.html (8,988 bytes)
- 9. Re: Breaking off a tap?! (score: 1)
- Author: Trevor Boicey <tboicey@brit.ca>
- Date: Wed, 05 Mar 2003 12:41:58 -0500
- I would guess that it keeps the thread pitch accurate. If you were tapping with a lot of force, and only one or two threads were riding the "completed" thread, the danger would be that the thread pit
- /html/shop-talk/2003-03/msg00031.html (9,062 bytes)
- 10. RE: Breaking off a tap?! (score: 1)
- Author: "Dave Scarlett" <dave_scarlett@excite.com>
- Date: Wed, 5 Mar 2003 14:36:25 -0500 (EST)
- Derek, I've been scratching my head trying to guess what you were doing here, sounds like a good idea but... do tell, inquiring minds need to know. Cheers, Dave I recently needed a half inch deep 10-
- /html/shop-talk/2003-03/msg00032.html (9,675 bytes)
- 11. RE: Breaking off a tap?! (score: 1)
- Author: Chris Kantarjiev <cak@dimebank.com>
- Date: Wed, 5 Mar 2003 12:45:39 -0800 (PST)
- There are three kinds of hand tap: taper, plug and bottoming. Plug and bottoming taps typically have a fairly short threaded section supported on a thinner shaft. All three types have a slightly dif
- /html/shop-talk/2003-03/msg00033.html (9,481 bytes)
- 12. RE: Breaking off a tap?! (score: 1)
- Author: Randall Young <ryoung@navcomtech.com>
- Date: Wed, 5 Mar 2003 15:38:01 -0800
- Chris, I beg to differ. The difference between taper, plug and bottoming taps is only how long the taper at the beginning of the tap is. A bottoming tap has only 1-2 partial threads, a plug tap has
- /html/shop-talk/2003-03/msg00034.html (10,499 bytes)
- 13. Re: Breaking off a tap?! (score: 1)
- Author: Mark J Bradakis <mjb@autox.team.net>
- Date: Thu, 6 Mar 2003 02:07:45 -0700 (MST)
- Good cutting fluid is a must when tapping. When tapping aluminum, I actually use charcoal ighter fluid. It is basically deodorized kerosene, a very light oil. And for some reason I always seem to hav
- /html/shop-talk/2003-03/msg00045.html (8,674 bytes)
- 14. Re: Breaking off a tap?! (score: 1)
- Author: "Michael D. Porter" <mporter@zianet.com>
- Date: Thu, 06 Mar 2003 03:02:44 -0700
- Tapmatic used to make an excellent cutting fluid for aluminum until it qualified as hazardous waste, since it was, basically, trichloroethane with a non-sulfurous lubricant. Now, almost any other lub
- /html/shop-talk/2003-03/msg00046.html (9,699 bytes)
- 15. RE: Breaking off a tap?! (score: 1)
- Author: Chris Kantarjiev <cak@dimebank.com>
- Date: Thu, 6 Mar 2003 11:05:55 -0800 (PST)
- Well, Randall, we're both right. Even though I checked Machinery's Handbook (mine is an old edition, the tenth), I misremembered what I read between the time I put the book down and started typing:
- /html/shop-talk/2003-03/msg00048.html (9,082 bytes)
- 16. RE: Breaking off a tap?! (score: 1)
- Author: Randall Young <ryoung@navcomtech.com>
- Date: Thu, 6 Mar 2003 12:27:06 -0800
- I've seen exactly one of those sets in my life, my grandfather got them from his father. I believe they were made around 1915. Fitted wooden box (cracked in several places), adjustable square dies,
- /html/shop-talk/2003-03/msg00049.html (8,684 bytes)
- 17. Re: Breaking off a tap?! (score: 1)
- Author: "Phil Ethier" <pethier@isd.net>
- Date: Thu, 6 Mar 2003 20:13:19 -0600
- Through holes, use a gun tap. And don't back off. The gun tap pushes the chips forward, so you you tap in one pass. One instructor I had always used a gun tap in blind holes, also. He did half the h
- /html/shop-talk/2003-03/msg00050.html (8,929 bytes)
- 18. Re: Breaking off a tap?! (score: 1)
- Author: David Scheidt <dmschei@attglobal.net>
- Date: Thu, 6 Mar 2003 22:43:08 -0500
- That's a spiral fluted tap, right? They don't work as well in non-ductile materials, which don't form such long chips. Hmm. Many of the cutting fluids I've used claim to be suitable for tapping cast
- /html/shop-talk/2003-03/msg00051.html (8,892 bytes)
- 19. Re: Breaking off a tap?! (score: 1)
- Author: "Phil Ethier" <pethier@isd.net>
- Date: Sun, 9 Mar 2003 00:59:43 -0600
- the No, a spiral POINT. See the pic at http://industrialhardware.com.au/Gun_Tap_M3x0_5_Goliath_0001HG.html where the description reads: "Gun Taps also known as Spiral Point Taps or Gun Nosed Taps. Gu
- /html/shop-talk/2003-03/msg00056.html (10,603 bytes)
- 20. RE: Breaking off a tap?! (score: 1)
- Author: Steven Trovato <trovato@computer.net>
- Date: Mon, 10 Mar 2003 08:06:54 -0500
- Have any of you actually tried building one of these? I have the book, and I'm tempted, but I haven't tried it yet. -Steve /// unsubscribe/change address requests to majordomo@autox.team.net or try /
- /html/shop-talk/2003-03/msg00063.html (8,068 bytes)
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