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How to remove a rounded hex grub screw?

Discussion in 'General DIY' started by devs, 8 Jun 2021.

  1. devs

    devs

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    Anyone know how I can remove this to replace? Many thanks!
    76748612-8B68-4FDC-8707-F07F53A9F7ED.jpeg 72F75E64-AAB5-4A49-BCF4-66F49144A761.jpeg
     
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  3. mattylad

    mattylad

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    Drill it with a HSS bit and use a screw extractor
     
  4. KenGMac

    KenGMac

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    What is that "red" stuff in the hole?

    Is that a small [almost] circular "hole" in the base of the old screw?
     
  5. devs

    devs

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  6. devs

    devs

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    The red is just staining. The grub has already been drilled some so appear circular on the photo rather than hex..
     
  7. JohnD

    JohnD

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    if you drill it, use a left-handed drill, at low speed. The torque, heat and vibration will often loosen and wind out a damaged screw. Start with a small one, centred, and gradually increase.

    drilling clockwise will only drive it in more firmly.

    use a vice and a drill press, at the least.

    please don't use a stud extractor unless you are skilled and/or have a tool to hold it steady. These extractors are very hard and brittle. Removing a snapped extractor is a lot more work than removing a burred screw.

    You are very wise not to tell us the dimensions of the part, or what it is, because this prevents anyone giving you specific advice.
     
  8. KenGMac

    KenGMac

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  9. thomp1983

    thomp1983

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    Probably a bit late now as you've tried drilling it but more often than not a torx bit hammered into the hex head will release them
     
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  11. devs

    devs

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    Many thanks for all the help guys. I managed to work it out! Happy man :)
     
  12. KenGMac

    KenGMac

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    OK no suspense, what did you do???
     
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  13. devs

    devs

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    Nothing too drastic.. Used the hex option above, wd'd, hammered in a slowly worked it out :)
     
  14. KenGMac

    KenGMac

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    AAA, do what works.
     
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  15. devs

    devs

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    Guys does anyone know what type of thread is on this? I purchased a replacement but it’s incorrect and I’m unsure of what it’s called and what to search for?

    correct in right 63C721D7-99B3-4036-855E-85A0875261B8.png
     
  16. JohnD

    JohnD

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    you are going to have to tell us the dimensions

    and what it's off

    what country it is from and when it was made.

    Dimensions... very accurately.... in mm.

    threads per inch if you can count them
     
  17. Munroast

    Munroast

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    didn't know such things existed - thank you
     
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