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> Screw extractor question
rosenfe
post Jun 27 2022, 12:09 PM
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I have a stripped shift bar cone screw. I bought a spiral screw extractor. Bit and extractor in kit. Do I drill clockwise? What direction to turn extractor?
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GeorgeKopf
post Jun 27 2022, 12:14 PM
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Drill a hole as normal. Try to get it as centered as possible (this can be tricky).

I'm assuming that the head broke off because it is rusted solid. Use PB Blaster or Liquid Wrench and let is soak. Apply some heat too if you can.

Then put the extractor bit in your drill and run it in reverse (extraction direction).

Go slow and put a lot of downward pressure to get the edges of the bit to bite into the metal.

Once the screw starts to move, keep going and it will unscrew itself.

Good Luck

George
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rosenfe
post Jun 27 2022, 12:23 PM
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The Allen head stripped.
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914 RZ-1
post Jun 27 2022, 12:38 PM
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I have had nothing but bad luck with screw extractors. They usually break off in the hole I drill. I usually end up drilling a hole thru the broken bolt bigger and bigger until I can get the pieces out.
You might want to consider getting a reverse drill bit. As you drill, it will often loosen the bolt. Good luck!
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live free & drive
post Jun 27 2022, 12:59 PM
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These screw extractors are made for socket head screws - they work very well:

No drilling required.

http://sockitout.com/
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rosenfe
post Jun 27 2022, 01:02 PM
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I’m going to try them. So they seem meant for stripped Allen head
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bdstone914
post Jun 27 2022, 02:42 PM
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QUOTE(rosenfe @ Jun 27 2022, 12:02 PM) *

I’m going to try them. So they seem meant for stripped Allen head



I have used Torx bits to remove bad allen head bolts.
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porschetub
post Jun 27 2022, 02:55 PM
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QUOTE(bdstone914 @ Jun 28 2022, 08:42 AM) *

QUOTE(rosenfe @ Jun 27 2022, 12:02 PM) *

I’m going to try them. So they seem meant for stripped Allen head



I have used Torx bits to remove bad allen head bolts.

(IMG:style_emoticons/default/agree.gif) have done the same.
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rosenfe
post Jun 27 2022, 03:26 PM
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I tried several but no luck.
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76-914
post Jun 27 2022, 07:49 PM
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I wouldn't be afraid to try a screw extractor if it wasn't a Harbor Freight or similar. Before you drill it out give it several good hammer strikes downward (probably upwards in your case). If it's recessed use a trashed bolt on top of it and hold the bolt with pliers when striking it This should upset rust and grit and free it of binding. As mentioned above, heat works well to break up the rust too. Use the largest drill bit that will set inside the stripped allen head. If you have a left hand bit then use it. Sometimes they come out when drilling CC. Keep the drill rpm low and use a cobalt or titanium bit. Keep it lubed when drilling. Don't get a side load on a cobalt or titanium bit as they are brittle. (IMG:style_emoticons/default/beerchug.gif)
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bkrantz
post Jun 27 2022, 08:28 PM
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Get a reverse direction drill bit set.
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rosenfe
post Jun 28 2022, 10:22 AM
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Going to try sockit out extractor. If that does not work I will drill
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VaccaRabite
post Jun 29 2022, 02:17 PM
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Weld a nut to the screw and turn it out. Don’t bother with the extractor. If the bit of the extractor breaks then you are in a world of pain.

Zach
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930cabman
post Jun 29 2022, 03:32 PM
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So far as I know, most set screws are hardened and are not drillable with conventional bits.
My vote would be either cram something in the socket or weld a nut
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rosenfe
post Jun 30 2022, 05:10 PM
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Used the sockitout tool today. Worked like a champ, out in 2 minutes.
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rosenfe
post Jun 30 2022, 05:15 PM
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Now I can’t get the sockitout tool off the cone screw, but that’s minor.now I can finish dropping the engine
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930cabman
post Jul 1 2022, 04:58 AM
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QUOTE(rosenfe @ Jun 30 2022, 05:15 PM) *

Now I can’t get the sockitout tool off the cone screw, but that’s minor.now I can finish dropping the engine


Consider this a victory, leave the sockitout in the cone screw for awhile and move on. Sounds as you have larger fish to ....
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