Lost Leica MP shutter dial screw

[ericdan]

My shutter dial came off pulling the camera out of my bag. Luckily I didn't lose the dial itself but the screw is gone.
This looks like a standard metric thread but I'm not sure about the length.

I assume leica or any repair shop will charge a fortune to fix that. Does anybody know where I can find specifications for this screw? It should be the same as the M3 dial I believe.

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[summicron1]

Go to DAG repair on the web -- http://www.dagcamera.com/index.html --- don goldberg is the god of leica repair. I bet if you ask him nicely he'll send you a new screw for the price of postage and a very modest sum. Heck, he has entire shutter dials for $20, so don't sweat it.

If it is not listed on his site, call him. He told me his site only shows 10 percent of what he has. This sort of screw is a standard stock item, i am sure.

meanwhile, dig around your camera bag with a magnet -- it might be there.

 

[250swb]

I'm sure Leica can sell you a new screw as well and without you needing to send the camera in for repair. I have ordered parts through my Leica dealer, things like new rewind cranks, screws, etc.

Steve

 

[ericdan]

Just called Leica in Germany. Turns out Leica replaces those screws for free. I'll post spare part number and specs once I receive it.


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[Xmas]

Some screws will be brass so invert gbag over bed sheet and look carefully.

 

[Peter Simpson]

And Loctite the new one

 

[ericdan]

Most definitely!


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[E. von Hoegh]

And Loctite the new one

DO NOT UNDER ANY CIRCUMSTANCES OR FOR ANY REASON PUT LOCTITE ON A SCREW THIS SMALL.
You'll be booby trapping the next person who works on the item.

Worst advise I've seen so far today...

 

[Xmas]

DO NOT UNDER ANY CIRCUMSTANCES OR FOR ANY REASON PUT LOCTITE ON A SCREW THIS SMALL.
You'll be booby trapping the next person who works on the item.

Worst advise I've seen so far today...

confirmed ~ even screw lock is ill advised.

 

[ericdan]

Thanks a lot!


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[ericdan]

FYI:
Part Number: 420-097.001-014
Description: Schraube, M1, 7x6



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[Xmas]

When you have replaced the screw dab a small spot of ladies nail lacquer on top of screw and wipe the top of dial with a rag damp with nail lacquer remover before the lacquer hardens.
Id use garish red but some people use clear...

 

[Newt_on_Swings]

That's fast shipping.

 

[ericdan]

No shipping. I went by Leica in Tokyo during lunch.


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[E. von Hoegh]

When you have replaced the screw dab a small spot of ladies nail lacquer on top of screw and wipe the top of dial with a rag damp with nail lacquer remover before the lacquer hardens.
Id use garish red but some people use clear...

I've collected several awful colors from the free tables at yardsales: Gold, bright yellow, teal, blood red, metalflake red. I use them as the mood strikes me. Sometimes all of them on one camera.
With very small screws a dab of lacquer - or enamel such as Humbrol or Testor's modelling paints - on the screwhead is a far better plan than anything on the threads.
Stubborn screws that have had sealant on the threads can often be loosened with a soldering iron, wipe off any solder and hold the tip on the screwhead. Properly fitting screwdrivers are a must, I cannot stress this enough.

 

[benjiboy]

It looks to me this screw has such a long thread on it it would take a lot to dislodge it without noticing it until you lost it.

 

[E. von Hoegh]

It looks to me this screw has such a long thread on it it would take a lot to dislodge it without noticing it until you lost it.

It has a fairly coarse pitch - which means high frequency mechanical vibration will loosen it and back it out rather rapidly - vibration such as it will find on jetliners and some other forms of transport. Also at loud music events.

 

[benjiboy]

It has a fairly coarse pitch - which means high frequency mechanical vibration will loosen it and back it out rather rapidly - vibration such as it will find on jetliners and some other forms of transport. Also at loud music events.

It's hard from the photograph to get a sense of scale of the size of the screw, but I think if screwed in tight it wouldn't unscrew so easily by vibration.

 

[E. von Hoegh]

It's hard from the photograph to get a sense of scale of the size of the screw, but I think if screwed in tight it wouldn't unscrew so easily by vibration.

The pitch is proportional to the diameter - a screw is a wedge rolled up. The steeper the wedge (coarser the pitch) the more likelihood of it loosening. The more you tighten a screw, the weaker it becomes.
A hundred years ago, gunsmiths used boiled oil to lock screws holding sights and so on; they also used the finest pitch screws practical. American sizes still used in such applications are 6-48 and 8-40.

 

[ericdan]

The thread is long but only the bottom part is actually used. The shutter dial itself doesn't seem to have threads.


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