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Old 10-08-2010, 11:09 PM   #1
noid
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Default best screw extractors?

What are the best screw extractors?
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Old 10-09-2010, 12:19 AM   #2
HTGTS350
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Default Re: best screw extractors?

Ive tried just about every type and brand of extractors over the years and it really depends on the type of screw, the material the screw is broken off in and the situation you are in. For really difficult screws the best method is to drill through the centre then use a die grinder to grind out the screw until you can just start to see the start of the threads then use a strong seal pick to remove the remaining bits or a sharp bottoming tap and just go in one third of a turn at a time until you get back to decent thread.
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Old 10-09-2010, 02:06 AM   #3
GeorgiaHybrid
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Default Re: best screw extractors?

The first ones I reach for are these:

Multi-spline extractors

Use a left handed drill bit to drill the holes for them and a lot of the time, the broken bolt will come out while drilling. If the extractor doesn't work, drill it on out as noted and pick out the remaining material or run a tap thru to clean it out.
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Old 10-09-2010, 04:08 AM   #4
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Default Re: best screw extractors?

My friend thats a Porsche mechanic runs into a LOT of broken bolts, and when the usual doesn't work, he uses a dremel with a tile cutter bit and drills into the middle and works his way around the inside until the bolt threads come out with a pick.

I've found the HF $8 kit of left hand drills and extractors works about as well as any, with the added benefit that I have zero concern for them and whacking with a hammer etc.
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Old 10-09-2010, 04:39 AM   #5
rockchucker
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Default Re: best screw extractors?

I have and use these...


http://www.sears.com/shc/s/p_10153_1...=1286613391165


I found them because I stripped the Head off of a Toyota Head Bolt. 12 Point 12mm Head. Yes on a HEAD BOLT! Pretty dumb idea Toyota. I thought I was screwed. I found them and the Head Bolt came right out without a hitch. Since I was replacing the stretched Head Bolts anyways I just used the Bolt-Outs to remove the rest of the Head Bolts instead of the 12 Point 12mm Socket. These things are great and they have saved my @$$ a few times now.
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Old 10-09-2010, 10:47 AM   #6
Monte
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Default Re: best screw extractors?

this thread is the best:

http://www.garagejournal.com/forum/s...crew+extractor
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Old 10-09-2010, 07:05 PM   #7
wafrederick
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Default Re: best screw extractors?

The straight flute extractors are the best over the spirals.Problem with the spirals are they overgrip and the remaining of the broken fastner does not come out easy.If anything remaing sticks out,weld a nut on it and this works and heating with the oxy torch is needed sometimes.Some bolts you can't drill,they are hardened.Chrysler is this way with the small 3/8 headed bolts which are special bolts on their yokes holding the driveshaft in place mainly on Dodge trucks and fullsize vans.
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