I would think a small butane torch from Dremel or Benzomatic would do the trick as well. The flame is small and focused but intense. I keep one on board mostly for hot knifing ropes. This is the kit I use: https://us.dremel.com/en_US/products/-/show-product/tools/2000-01-versatip-precision-butane-torch ~$45 on Amazon, etc
Kevin Driscoll On Wed, Jul 21, 2021 at 2:43 PM Graham Collins via CnC-List < cnc-list@cnc-list.com> wrote: > get/borrow a big (200W) soldering iron. I've got one as part of a wood > branding kit, and places that build large cable assemblies would have > one. Maybe stained glass makers. > > Graham Collins > Secret Plans > C&C 35-III #11 > > On 2021-07-21 12:43 p.m., Adrian C Humphreys via CnC-List wrote: > > West has a wealth of epoxy-related info. From this page: > > > > > www_dot_westsystem_dot_com/instruction-2/epoxy-basics/bonding-fasteners-hardware/ > > > > " Removing Epoxied Fasteners > > .... > > Remove a permanently bonded fastener by applying heat to the head of the > fastener with a soldering iron or propane torch. Use a heat shield to > protect the surrounding area. Heat will travel down the fastener, softening > the epoxy in contact with it. At about 120°F the epoxy should soften enough > to allow the fastener to be backed out. Allow more time for heat to travel > down longer or larger diameter fasteners. > > " > > > > Adrian Humphreys > > Epilogue, Rockport ME > > C&C 33-2 > > adri...@telamontech.com > > > > > > > > > >> On Jul 21, 2021, at 10:48 AM, Bill Coleman via CnC-List < > cnc-list@cnc-list.com> wrote: > >> > >> To Dwight’s comment, unfortunately no, I can’t just grind it away and > ignore it, I am too Anal. > >> > >> The head was sticking out a couple inches (with an inch and a half in > epoxy), so that is what I was using to unscrew, as well as two lock nuts, > so I had two wrenches to unscrew with. Unfortunately, it broke almost flush > with the transom underneath the lock nuts. I should have lathered more > Vaseline on it. Don’t want to beat on it, as it is really in there, and > beating would no doubt break the inner and outer layers away from the foam > core, and the backstay is right about there . . . > >> > >> And thanks for all the suggestions, I have all the left hand drills and > easyouts, etc, I understand removing it like that is do-able, I just am to > anal to booger it up. That will be my last resort. I know there has to be a > way to heat the stud up. If I took a welder down, it would be fairly simple > to heat up, those obviously can take a direct short. And I have a half > dozen welders, but they are all 3 phase and not easy to drag onto a boat. I > was mostly looking for electrical advise. It sounds like the consensus is > that this 12V power supply is not something that can take a direct short. > If I can’t figure the bolt heating out, I suppose eventually I will have to > try the easy out or failing that rout out around the bolt. > >> > >> Like Old Lodge Skins, I will have to smoke on it till I figure it out. > . . . > >> > >> > >> Bill Coleman > >> Entrada, Erie, PA > >> > >> > >> > >> From: ALAN BERGEN via CnC-List [mailto:cnc-list@cnc-list.com] > >> Sent: Tuesday, July 20, 2021 6:09 PM > >> To: Stus-List > >> Cc: ALAN BERGEN > >> Subject: Stus-List Re: Broken Bolt in Epoxy > >> > >> You can probably drive the bolt back through the transom using a hammer > or sledge hammer, and then a punch and a hammer. A hard strike should break > it free from the epoxy. If it's truly a carriage bolt, you don't want to > try to turn it. A carriage bolt has a round head and a square neck. > >> > >> Alan Bergen > >> 35 Mk III Thirsty > >> Rose City YC > >> Portland, OR > >> > >> > >> > >> On Tue, Jul 20, 2021 at 2:42 PM dwight veinot via CnC-List < > cnc-list@cnc-list.com> wrote: > >>> Can you just grind it away and leave it. > >>> > >>> On Tue, Jul 20, 2021 at 3:41 PM Bill Coleman via CnC-List < > cnc-list@cnc-list.com> wrote: > >>>> I have a Broken ¼ - 20 broken carriage bolt with around 2 threads > showing out my transom. > >>>> 1 ½” is embedded in epoxy. An easy-out seems unlikely. I did four, > three of them unscrewed successfully, but apparently I didn’t coat this one > thoroughly enough with the Vaseline. > >>>> > >>>> I am thinking that if I can heat the bolt up to around 300 degrees or > so, it will break the bond with the epoxy. A soldering iron seems *maybe* > possible, but that is only one side. I was wondering if I could heat it up, > like plumbers do with welders to melt frozen water lines, it might be an > option. > >>>> But I don’t understand enough about electrical resistance to know how > to go about it. Using a battery for juice seems risky, having seen what > happens when I have shorted them out with a wrench – > >>>> I do have a 30 amp adjustable Powerwerks power supply, which seems a > little safer. > >>>> What I don’t understand, is if I can put a positive on one end of the > bolt, and negative on the other, will it heat the bolt, or will it just > melt the insulation off the wires? Or ruin the power supply? Or is it a > factor of the gauge of the wires? > >>>> > >>>> Bill Coleman > >>>> Entrada, Erie, PA > >>>> > >>>> > >>>> Thanks to all of the subscribers that contributed to the list to help > with the costs involved. If you want to show your support to the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > Thanks - Stu > >>> -- > >>> Sent from Gmail Mobile > >>> Thanks to all of the subscribers that contributed to the list to help > with the costs involved. If you want to show your support to the list - > use PayPal to send contribution -- > https://urldefense.com/v3/__https://www.paypal.me/stumurray__;!!LIr3w8kk_Xxm!61cXmQ3t_0HBAdnGhtRD8lgVwNjDVtT-8uqhtSM8F0aVJFfk5eDfhB2Km5s1TBL1Vk8$ > Thanks - Stu > >> Thanks to all of the subscribers that contributed to the list to help > with the costs involved. If you want to show your support to the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > Thanks - Stu > > Thanks to all of the subscribers that contributed to the list to help > with the costs involved. If you want to show your support to the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > Thanks - Stu > Thanks to all of the subscribers that contributed to the list to help with > the costs involved. If you want to show your support to the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray Thanks > - Stu
Thanks to all of the subscribers that contributed to the list to help with the costs involved. If you want to show your support to the list - use PayPal to send contribution -- https://www.paypal.me/stumurray Thanks - Stu
