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#Post#: 3526--------------------------------------------------
Broken bolt removal
By: Chainsawrepair Date: July 29, 2011, 5:50 pm
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I have some non chainsaw projects that the bolts are broken off
flush with casing. What is the easiest way to remove? I'm
thinking of trying a EZ out.
Never used so how do they work or any other ideas.
#Post#: 3529--------------------------------------------------
Re: Broken bolt removal
By: rgclmc Date: July 30, 2011, 10:07 am
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The best luck I've had is with a left handed drill bit, if you
can find one.
#Post#: 3532--------------------------------------------------
Re: Broken bolt removal
By: Playinwood Date: July 30, 2011, 10:59 am
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I second a left handed drill bit but try a prick punch and
hammer,if it comes easy continue but if its tough use the drill
bit.
The secret with the LH drill bit is once you are in about an
1/8th put downward pressure on the drill motor so the "edge" of
the bit contacts the side of the hole. This will cause you to
jam the bit and instead of the bit spinning will cause the
broken bolt to wind its way out.Aluminum is pretty soft and
usually comes out fairly well.
If that doesn't work, continue hole completely through broken
section and use as a pilot hole with EZ out...
#Post#: 3533--------------------------------------------------
Re: Broken bolt removal
By: man of stihl Date: July 30, 2011, 11:23 am
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[quote author=Chainsawrepair link=topic=398.msg3526#msg3526
date=1311979802]
I have some non chainsaw projects that the bolts are broken off
flush with casing. What is the easiest way to remove? I'm
thinking of trying a EZ out.
Never used so how do they work or any other ideas.
[/quote]How big is the bolt? EZ outs work good. you drill a hole
through the bolt. The EZ out is tapered, so you beat it into the
hole you just drilled. The part that you hammer in has backwards
cutters that dig in when you unscrew the EZ out.
#Post#: 3536--------------------------------------------------
Re: Broken bolt removal
By: Chainsawrepair Date: July 30, 2011, 1:46 pm
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Never heard of left drill bits till this. Think I will buy a set
of left drill bits and set of ez out to have on hand.
Thanks.
#Post#: 3544--------------------------------------------------
Re: Broken bolt removal
By: farmboy Date: July 31, 2011, 9:18 am
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I bought my last left hand bits @ Autozone $6?. Another option
is lay a nut one size smaller on top of broken bolt mig/tig
inside nut, remove w/ wrench. On smaller stuff put use a washer
slightly smaller tack then weld nut to washer. Am going to use
the last method on 359 muff. Kid that was helping me broke e-z
out off in muff support bracket hole (5mm bolt) me telling him
don't pull too hard you will break it. 2 breath's later I heard
him cussing.
Shep
#Post#: 3545--------------------------------------------------
Re: Broken bolt removal
By: Playinwood Date: July 31, 2011, 9:59 am
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More good advice with the washer and welding a nut on. They work
well if you just happen to have a tig outfit hanging around.
One more, on larger bolts, drill pilot hole just slightly
smaller than broken object, then take small center punch or
chisel and collapse broken section towards the center of the
hole, once a small piece is removed it relieves outward pressure
and the remainder seems to screw right out.
#Post#: 3551--------------------------------------------------
Re: Broken bolt removal
By: Old Iron Logging Date: July 31, 2011, 1:52 pm
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Buy a set of extractors, you will never regret the money spent.
#Post#: 3561--------------------------------------------------
Re: Broken bolt removal
By: Al Smith Date: August 1, 2011, 11:54 am
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You can "peck " them out with a prick punch or a skinny drill
bit shapened like a prick punch .It helps to give them a good
soaking first with Kroil or PB blaster .
Often times however and especially on an old saw the darned bolt
is captured by corrosion or galvanic action caused by dissimilar
metals .It might not hurt to warm the aluminum around the bolt a
tad because the aluminum will expand faster than the steel bolt
.
Worst case when all fails is drill and tap for the next sized
bolt ,often the only option .Not the first time nor the last .
#Post#: 3576--------------------------------------------------
Re: Broken bolt removal
By: farmboy Date: August 2, 2011, 12:53 pm
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I have made my own extractors by grinding a bolt to 4 tapered
sides. Tap in w/hammer use bolt head to remove. Works good on
broken pipe fittings, etc.
Shep
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