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Hi,

Tried to over screw and broke it inside the tripod thread. I'm using the tripod thread frequently for my back strep.Do you have any suggestions what can be done?

Thanks in advance.

Yossi 

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There are left drills. I have bought one at Ebay to remove a dead screw of a lens. You must choose one, that is thinner than the inner diameter of 3/8" thread. Pay attention, that you will not reach the exact center of the broken screw. So still thinner than the inner diameter. If the drill alone does not help, there are special tools to remove the screw, they have a special left screw too (see the film of a.noctilux at 1:30). If you need further help, you can email me.

Edited by jankap
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If you use a screw extractor it is also a very good idea to first use some penetrating oil.   https://backyardtoolshed.com/best-penetrating-oil/  This will save you from winding up with a bigger problem, a broken extractor.  And remove that bottom plate before you work on it.  If there is going to be damage, limit it.  Bottom plates are way cheaper than cameras.

Edited by boojum
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19 minutes ago, AndreasG said:

The threaded part is in the camera body, not in the bottom plate.

That will make it a lot more difficult.  My bad.  Just use some penetrating oil, a drop, give it an overnight to work its magic and then gingerly back out the bolt with an extractor of your choice.  If you are at all squeamish, take it to a jeweler or a camera repair shop.  In the future use a lens-mounted tripod support thread.  My general impression is that the Leica M series is not a tripod camera.  Correct me if I am wrong. Another case that is like chewing gum in church.  You can do it but it is not a good idea.

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vor 9 Stunden schrieb boojum:

My general impression is that the Leica M series is not a tripod camera.  

Quite right. My IIIf has the tripod thread at the far end of the bottom. Ridiculous, it should be underneath the center of the lens!

I wonder, that the screw could be broken by hand. Perhaps the screw was too long and was at the bottom of the hole. I have mounted Arca Swiss adapters on my cameras. That adds weight, but it is very practical. Even the Tessina has got one!

I also wonder, why Leica, Canon, Nikon, etc do not offer an Arca Swiss connection as standard on their cameras.

Edited by jankap
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If it was my camera, first I cover the camera as far as possible with protective tape and then I mill (or ask somebody who has a micro milling device) a small slot 1x3mm, depth 2mm into the remaining thread and remove the remaining thread with a screw driver.

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3 hours ago, jankap said:

I wonder, that the screw could be broken by hand. Perhaps the screw was too long and was at the bottom of the hole.

I think yossishahak might have meant 'strap' - maybe one of those sling straps that attach to the bottom of the camera via a tripod screw? It may be tempting to overtighten those to make the strap 'secure', and the whole weight of the camera is on the screw...

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1 hour ago, Anbaric said:

I think yossishahak might have meant 'strap' - maybe one of those sling straps that attach to the bottom of the camera via a tripod screw? It may be tempting to overtighten those to make the strap 'secure', and the whole weight of the camera is on the screw...

Torque at play - both ACW & CW, depending, and somewhat random - resulting in further binding, possibly.

If the metals of the strap-anchor and the bush are the same or similar in the electro-chemical series, they will ‘weld’ if allowed, ie prolonged contact.

Edited by Steve Ricoh
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13 hours ago, AndreasG said:

If it was my camera, first I cover the camera as far as possible with protective tape and then I mill (or ask somebody who has a micro milling device) a small slot 1x3mm, depth 2mm into the remaining thread and remove the remaining thread with a screw driver.

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Use a dremel with a small cutting wheel to make a slot in the broken screw. Use a screw driver to unscrew the broken tap.

 

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On 12/28/2020 at 10:51 AM, jankap said:

I wonder, that the screw could be broken by hand. Perhaps the screw was too long and was at the bottom of the hole. I have mounted Arca Swiss adapters on my cameras. That adds weight, but it is very practical.

Thanks for all the answer and yes i meant Strap.  sling straps that attach to the bottom of the camera via a tripod screw.

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7 hours ago, AndreasG said:

The idea is good, but the diameter of a standard Dremel cutting wheel is 24mm, which is too large, you would need a wheel with approx. 8mm diameter.

After a cutting wheel has been used a few times they wear down smaller. The key would be to use a used wheel or wear one down to the size needed.

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