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

 

 

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