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Old 09-23-2018, 03:14 PM   #1
rocky
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Default Someone rounded off a $&#%!!! Allen bolt

Trying to remove a rounded off Allen bolt on the fan clutch. The other three came free nice and easy, but one was rounded off by whoever put it on....
I've sprayed on a bunch more on PB blaster on it and letting it sit.

Is there anything like a damaged screw remover for allen bolts?
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Old 09-23-2018, 03:44 PM   #2
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My usual go to has been to dremel slots in to get. Flathead in there. I think extractor sets at the HW store will work. Drill and reverse tap style.

I guess it's a difficult spot to work on?
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Old 09-23-2018, 04:48 PM   #3
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Not difficult, its sitting on my workbench...Its a spare fan and old bad clutch that I decided its time to separate.
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Old 09-23-2018, 06:44 PM   #4
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We use electric fans only for obvious reasons.
Good luck separating the pieces.
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Old 09-24-2018, 05:35 AM   #5
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Are you trying to save the clutch, fan or both? If you have a mig you can weld in a small bolt to aid removal.
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Old 09-24-2018, 05:45 AM   #6
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By "Allen bolt" do you mean a hex head cap screw?

If the head is accessible, you could just grab it with a vise grip clamped down real tight; BTDT. Otherwise, screw extractors might work; https://www.amazon.com/Magimous-Dama...df_B01NGTLM40/.

Left-hand drill bits have also worked for me.
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Old 09-24-2018, 07:25 AM   #7
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Someone gave me the advice once of using a torx bit. Use one slightly larger than the opening and hammer it in.
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Old 09-24-2018, 08:16 AM   #8
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hi chris, that would be easy to drill out as the bit would self center in the socket head. or, this style of extractor work well if you want to try.



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Old 09-24-2018, 12:31 PM   #9
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Quote:
Originally Posted by WK2Burner View Post
My usual go to has been to dremel slots in to get. Flathead in there. I think extractor sets at the HW store will work. Drill and reverse tap style.

I guess it's a difficult spot to work on?
Thats a solid idea. Option B would be to cut off the head and tack weld a metal piece once you get the pulley off. Likely easier without the pulley in the way
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Old 09-25-2018, 07:24 AM   #10
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Or if you have a spare allen wrench you aren't particularly fond of, stick it in there best you can and then weld it to the bolt with a couple blobs. Let it cool before you grab the wrench! (duh) The combination of heat and twist will solve your problem.
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