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Professional Stripped set screw for gimbal yaw arm

Discussion in 'Phantom 3 Help' started by Stephen Marino, Apr 17, 2016.

  1. Stephen Marino

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    I had a P3 Pro crash that appeared to bend the gimbal yaw arm and the repair shop insisted on replacing the camera. I purchased a replacement yaw arm, but I noticed the original arm was not really bent -- it had been pushed out of position on the shaft. When I attempted to loosen the set screw, I discovered it was partially stripped! Unfortunately, I only succeeded in stripping the screw completely. Anyone know the best way to extract the stripped screw?
     
  2. Sinisalo

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    I have never seen how big the set screw is but you may be able to find a small enough left hand tap to get the job done. If not you may be able to use a dremel to cut a line in the screw so you can use a small flat head screw driver to pull it out.
     
  3. LamboH

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    Go next siZe up on screw driver. I believe u are looking for a Torx head screw t-6 possibly. Try t7/t8. And give it a go. If that doesn't work , try using an old t-6/t-7 screw driver and grind the tip off( to where what's left is beefier- more area for it to grip on ).

    Last but lot least if that still don't work try stabbing a rubber band in the set screw and use correct size screw driver to twist it out ( rubber band adds grip )

    Still no go? Try securing the gimbal best u can so that the screw head is parallel to the table it's gonna be sitting on. This is important because u will be tapping the butt end of correct size (or one size up ) screw driver while working and untwisting screw driver . This is a little tricky , your main goal is to tap the butt and untwist the screw in hopes that Torx bit digs in /grabs the set screw and be able to turn it .


    All else fails maybe solder the screw driver in /super glue tonscrewdriver head in and hope it sticks so u can twist out
     
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  4. LamboH

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    That set screw is so it holds the roll arm in place ( holds in place up and down and the shaft its on has a flat milled out so the set screw can catch. Try twisting the roll arm slightly, while holding the top gimbal board securely . ( trying to twist the rolls arm and set screw off the flat on the shaft ) This should loosen the screw some maybe help if u can't get it to budge using other tricks


    See attached pics

    And confirmed t-6 is the correct size.


    Ps almost all Torx head screw on the phantom 3 will be either t6/t8. From my experience
     

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    #4 LamboH, Apr 17, 2016
    Last edited: Apr 17, 2016
  5. LamboH

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    Your set screw in question . Little bitty thing
     

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  6. Sinisalo

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    since it is so small and doesn't look like it requires a lot of torque to spin, I would think if your suggestions don't work he could try gluing a bit in there with some gorilla glue or something similar and then once the glue is cured he could just twist it out.
     
  7. mdowney58

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    I wonder if Torx is one of the P3P upgrades, because my P3S has an Allen screw in it

    Sent from my SM-N910V using Tapatalk
     
  8. LamboH

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    One last machinist trick to back out a stripped set screw -( rarely works but when it does ---talk about CLUTCH )

    Get a small pick with a sharp pointy point to it . You can grind down an old small screw driver etc . Get in their with the pick and try to spin the the set screw out . Pushing / prodding /nudging at the inside points on the set screw . This is usually my last resort before having to finding a super tiny drill bit and drilling the set screw out
     
  9. LamboH

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    I think u may be correct. The correct size for the screw is 1.5 mm allen (hex head) Early morning brain fart
     
  10. mdowney58

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    That being said, I have had a Torx grab in a worn out Allen screw, and vice-versa!
    When in trouble, try ANYTHING before resorting to a drill.

    Sent from my SM-N910V using Tapatalk
     
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  11. LamboH

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    Yea no doubt. I would definitely try the pick and manually spin it out. The screw itself is short so not that many threads overall . I've successfully backed out some set screws that were put under a lot of pressure. Same set screw under a lot of pressure also dealt with very high temps( thus swelling the set screw )
     
  12. Stephen Marino

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    Wow -- thanks for all the responses! I will give glue a try. (I can't seem to get a grip with any tool at this point.) I read another article that says the screw is an M3x4mm, so I'll order some.