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Author Topic: Need suggestions on removing a broken bolt (hardened bolt) from a 2014 Heritage  (Read 506 times)

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June 03, 2020, 08:09:30 PM
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jonda1

Supporting Member
A friend broke a hardened bolt off on his 2014 Heritage.  He can't get a drill bit on it to drill it.  Has anyone got any ideas of how to remove this bolt.  It is the shiny spot between the two large bolts.


June 03, 2020, 08:50:14 PM
Reply #1
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HDBitchin

Administrator
I take it that you can get a drill bit on it but since it is harden a drill isn’t going to be able to penetrate it. For harden steel a carbide or cobalt bit might help but maybe not. Our tool expert @maniacmac might be the best to actually give a real answer on this one.

Just some FYI if it weren’t harden this link is a pretty good source for tapping bolts broken bolts and using easy-outs to get bolts out.

http://www.madelectrical.com/workshop/broken-bolts.shtml

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June 03, 2020, 10:49:51 PM
Reply #2
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maniacmac

Global Moderator
Here's the method I would use- Lay a 3/8 nut on top of the bolt hole and weld the center of the nut to the broken bolt- I'm guessing at the size to use as I'm not there. While the nut is still hot use a 9/16 wrench or socket to remove the broken bolt. If the bolt is broken off too far in the hole this won't work can't really tell looking at a picture. If you want to try to drill use a cobalt bit( need to use a slow speed) starting with a 1/8 inch bit and then larger to fit your extractor. (notice I didn't call it an easy out, hell if it would come out easy it wouldn't have broken in the first place lol ). You can remove the hardest by heating the broken bolt with a carbon flame but you probably screw up the paint around the bolt. If you have a die grinder you use a carbide bit. Still want to know who started calling them easy outs.
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June 04, 2020, 06:18:10 AM
Reply #3
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Nowhereman

Supporting Member
Heat the damn thing till it starts to turn color.
Grab a big pair of vice grips and clamp that bastard as hard as you can.
Right before cranking ofn the thing to remove, a glass of ice cold water  drained on it to thermal shock the bolt materal.
THen grab those vice grips and unscrew it.
- Nowhereman

June 04, 2020, 08:24:31 PM
Reply #4
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Rider Ron

Supporting Member
Can you get a straight shot at it?  Could you use a narrow cold chisel to 'cut' a slot in it?  Then use a pencil torch to heat it and use an impact (hammer) driver to try to bust it loose?
USArmy War College '68-70, AMA, IB 1K, 2015 SR Run For The Wall FNG

June 06, 2020, 05:11:03 AM
Reply #5
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01rk

Retired Staff Member
First get some Kroil, it's for loosing frozen bolts you can find it at an industrial hardware supply like fastenal, give it 2 or 3 applications and let it soak in
then do what Mac said using cobalt drill bits, make sure you keep the drill  bit cool, don't rev the drill to high.
Get Your Motor Runnin'


June 26, 2020, 08:52:28 PM
Reply #6
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Rider Ron

Supporting Member
A friend broke a hardened bolt off on his 2014 Heritage.  He can't get a drill bit on it to drill it.  Has anyone got any ideas of how to remove this bolt.  It is the shiny spot between the two large bolts.

Soooo, what was the final outcome, @jonda1 ?
USArmy War College '68-70, AMA, IB 1K, 2015 SR Run For The Wall FNG


 



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