---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Sat 11/19/11: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 0. 12:42 AM - The Value of a Forum... (Matt Dralle) 1. 01:41 AM - Re: Re: broken tap (GRAHAM SINGLETON) 2. 05:13 AM - Re: broken tap (hagargs) 3. 02:03 PM - Re: broken tap (Fred Klein) 4. 07:21 PM - Re: broken tap (Andrew Sarangan) ________________________________ Message 0 _____________________________________ Time: 12:42:27 AM PST US From: Matt Dralle Subject: Europa-List: The Value of a Forum... If you look forward to checking your List email everyday (and a lot of you have written to say that you do!), then you're probably getting at least $20 or $30 worth of Entertainment from the Lists each year. You'd pay twice that for a subscription to some magazine or even a dinner out. Arn't the Lists worth at least that much to you? Wouldn't it be great if you could pay that same amount and get a well-managed media source free of advertising, SPAM, and viruses? Come to think of it, you do... Won't you take a minute to make your Contribution today and support YOUR Lists? Please make a Contribution today at: http://www.matronics.com/contribution or by dropping a personal check in the mail to: Matt Dralle / Matronics 581 Jeannie Way Livermore CA 94550 Again, I want to say THANK YOU to everyone that has made a Contribution thus far during this year's List Fund Raiser!! These Lists are made possible exclusively through YOUR generosity!! Thank you for your support! Matt Dralle Email List Admin. ________________________________ Message 1 _____________________________________ Time: 01:41:26 AM PST US From: GRAHAM SINGLETON Subject: Re: Europa-List: Re: broken tap Fred=0Ayou could try pushing four bits of locking wire down the flutes,twis t them =0Atogether and trying to work it out. Best approach at that stage i s twisting and =0Areversing a bit at a time. You will need to break off the bits of swarf from the =0Alast bit of cutting before the tap broke. Warmin g the aluminum might help, it =0Awill expand more than the steel tap. Good luck!=0AGraham=0A=0A=0A=0A________________________________=0AFrom: Fred Kle in =0ATo: europa-list@matronics.com=0ASent: Saturda y, 19 November, 2011 4:20:58=0ASubject: Re: Europa-List: Re: broken tap=0A =0A=0A=0AOn Nov 18, 2011, at 7:45 PM, rparigoris wrote:=0A=0A> =0A> **I rem ember seeing tap removers for two and three flute taps, they have prongs =0A>to fit down the flutes. Perhaps have a look in McMaster,=0A=0ARon...exc ellent suggestion...I find that "4 finger" extractors exist...and =0Ahopefu lly, I can find one locally which I can borrow!=0A=0AThanks much...Fred=0A ===================== ________________________________ Message 2 _____________________________________ Time: 05:13:46 AM PST US From: hagargs Subject: Re: Europa-List: broken tap Depending on how far you are in get a punch and a big hammer and punch it through all the way from the best side. Then drill the hole for a heli-coil and go ahead and put the screw in. By the way you should be using coarse threads for soft material like aluminum. Use 10-24 and lubricant when tapping. Steve Hagar -----Original Message----- >From: Fred Klein >Sent: Nov 18, 2011 7:14 PM >To: europa-list@matronics.com >Subject: Europa-List: broken tap > > >Well...I feel like I just REALLY stepped in it. > >While carefully, slowly, tapping 10-32 threads in 1/2" thick aluminum, >I've broken the tap. > >I needn't go into detail as to what I was attempting to accomplish, >but it was in conjunction with providing bolts to the mono LG swing >arm to which brackets supporting a portion of a fairing for the main >wheel would attach. > >Not sure how to proceed, though I suspect I'm not the first to break a >tap. > >I'm not optimistic of being able to drill out the tool steel of the >broken tap, and even if that could be accomplished, my hunch is I'd >end up having to use a larger bolt. > >One possibility would be to grind the portion of the embedded tap >which is proud of the surface of the aluminum, alter the bends in the >bracket, and drill a new hole (say) 2 diameters away from the existing >partially-plugged hole. > >On the other hand, perhaps there is a well-recognized method for >extracting the broken tap? > >Any suggestions?...anyone? > >Fred >A194 > > ________________________________ Message 3 _____________________________________ Time: 02:03:30 PM PST US From: Fred Klein Subject: Re: Europa-List: broken tap On Nov 19, 2011, at 5:10 AM, hagargs wrote: > By the way you should be using coarse threads for soft material > like aluminum. Use 10-24 and lubricant when tapping. Good point Steve...it hadn't occurred to me to use coarse threads. I'll be needing to safety-wire the bolts, so I'd ordered (and have in hand) AN3H-3 bolts...looking again in the Acft Spr cat., I only find 10-24 threads in some cap screws w/ slots for single blade screwdrivers. Guess I'll settle for what I have...and if the threads strip, upsize to 1/4 dia. bolts... Fred ________________________________ Message 4 _____________________________________ Time: 07:21:08 PM PST US From: Andrew Sarangan Subject: Re: Europa-List: broken tap Mcmaster has a number of tools for removing broken taps. I do remember using one of the extractors. You need to buy the right size for it to work correctly. Search under tap remover at mcmaster.com On Fri, Nov 18, 2011 at 9:14 PM, Fred Klein wrote: > > Well...I feel like I just REALLY stepped in it. > > While carefully, slowly, tapping 10-32 threads in 1/2" thick aluminum, I've > broken the tap. > > I needn't go into detail as to what I was attempting to accomplish, but it > was in conjunction with providing bolts to the mono LG swing arm to which > brackets supporting a portion of a fairing for the main wheel would attach. > > Not sure how to proceed, though I suspect I'm not the first to break a tap. > > I'm not optimistic of being able to drill out the tool steel of the broken > tap, and even if that could be accomplished, my hunch is I'd end up having > to use a larger bolt. > > One possibility would be to grind the portion of the embedded tap which is > proud of the surface of the aluminum, alter the bends in the bracket, and > drill a new hole (say) 2 diameters away from the existing partially-plugged > hole. > > On the other hand, perhaps there is a well-recognized method for extracting > the broken tap? > > Any suggestions?...anyone? > > Fred > A194 > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/europa-list Browse Digests http://www.matronics.com/digest/europa-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.