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Home✈️Aircraft🚁HelicopterHIROBOHirobo Turbulence › Help: Thread on the ball is broken
01-28-2012 01:48 AM  7 years ago
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rudyy

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E. Amherst, NY

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Help: Thread on the ball is broken
The thread on the ball is broken, and now the thread resides in the elevator lever.

Do you know if there is anyway to take it out? If not, what is the workaround if I do not want to replace the whole part? Can I use the inner hole on the lower arm while using the outer hole on the upper arm. Since the arm is so long, I think it should be ok, but I am not 100% sure. I am so frustrating now. It will be a joke if I have to replace the whole part.

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01-28-2012 02:34 AM  7 years ago
B.T.D.T.

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NY

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You need to get an extractor kit.

You need to remove the part and set it flat on a drill press and drill it out with a very small bit and use an extractor bits to screw in the reverse rotation to grip the screw out. Since it was lock tight, you need to heat it up to break the bond and then screw it out.

Good luck.

If you post in the main or off topic section, you will get a bigger response.
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01-28-2012 02:37 AM  7 years ago
Dr.Ben

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Richmond, VA, USA

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No, you can't mix and match holes.All you need to do is drill the hole out with a #47 drill bit and replace remount the ball with a longer bolt with a 2mm nut on the backside.

Ben Minor
Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA
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01-28-2012 03:41 AM  7 years ago
Los_Hirobo

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NJ

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What Ben Says!
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01-28-2012 03:52 AM  7 years ago
Dr.Ben

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Richmond, VA, USA

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An easy out (screw extractor)would be a nice idea if you could find one that small AND get it to bite into the thread remnants in order to back them out. The problem with heating the part is that by the time you get it hot enough to get the loctite nice and soft, you're going to also be heating up the bearing and its lubricant.

222MS loctite goes long way towards preventing this very frustrating problem.

One other trick that you might get away with is to drill the hole out with a 48 or 49 drill bit and then chase the hole with a 2mm tap. PLEASE; if you try this, use plenty of cutting fluid and go SLOWLY.

Ben Minor
Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA
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01-28-2012 06:03 AM  7 years ago
Hoggy42

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Australia

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Depending on how much of the bolt is hanging out you maybe able to cut a grove in it with a dremel or similar tool. Then use a small flat blade screwdriver to remove it.

Or take the part to a watch maker if your really stuck I'm sure they would have the tools
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01-28-2012 02:42 PM  7 years ago
TMoore

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Cookeville, TN

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If it's a through hole the first time you make contact with a drill, it will push the broken thread out the other side.

TM
Delayed Response Operator Not Engaged
AMA SECTION 336 = Gone, replaced by the FAA
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01-28-2012 09:42 PM  7 years ago
rudyy

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E. Amherst, NY

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The broken thread was taken out but the thread on the lever is damaged. I need to use a nut to secure the ball, but there is not enough clearance between the lever and the frame. I need to slighly file the frame to give room for the nut to travel. What an headache.
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