1926 Leica 1a - Repair Help

[beoon]

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I have a 4 digit Leica 1a 1926 (original condition, not updated) that has 2 faulty parts required.

Yesterday I stripped the camera down, this is my first time working on any Leica, so a big deep of breath was required.

I have managed to remove the 2 damaged parts and rebuilt the camera minus the faulty parts.

I wondered if anyone has any spare parts that could help?

The film advance shaft with the sprockets to transport film has a pin at its base which has been damaged, I have now removed this damaged pin and I am looking for a replacement.

The part that this pin engages with is a gear and it looks like the pin on this gear has sheared off as well, a replacement gear would be perfect.

How it works is this (I think). When the film is advanced the 2 pins engage and the film is wound on 1 frame.

When the shutter is pressed the gear at the bottom is pushed down and the shutter trips, on release of the shutter button a flat plate spring returns the gear back into its position ready for thee next film rewind.

If anyone can help with these parts or even just the pins from a damaged camera that would be great.

Best wishes from Scotland

Alan Stokes

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[jaapv]

https://www.dagcamera.com/store/c8/Leica_Screwmount.html

Mail him; he has much more than is shown on his website.

[pcgarner]

1 hour ago, jaapv said:

https://www.dagcamera.com/store/c8/Leica_Screwmount.html

Mail him; he has much more than is shown on his website.

Yes, and the best of the best.

[willeica]

5 hours ago, beoon said:

I have a 4 digit Leica 1a 1926 (original condition, not updated) that has 2 faulty parts required.

Yesterday I stripped the camera down, this is my first time working on any Leica, so a big deep of breath was required.

I have managed to remove the 2 damaged parts and rebuilt the camera minus the faulty parts.

I wondered if anyone has any spare parts that could help?

The film advance shaft with the sprockets to transport film has a pin at its base which has been damaged, I have now removed this damaged pin and I am looking for a replacement.

The part that this pin engages with is a gear and it looks like the pin on this gear has sheared off as well, a replacement gear would be perfect.

How it works is this (I think). When the film is advanced the 2 pins engage and the film is wound on 1 frame.

When the shutter is pressed the gear at the bottom is pushed down and the shutter trips, on release of the shutter button a flat plate spring returns the gear back into its position ready for thee next film rewind.

If anyone can help with these parts or even just the pins from a damaged camera that would be great.

Best wishes from Scotland

Alan Stokes

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Nice camera Alan. Sorry to hear about the problems. I think Jaap is right and Don should have more than he is advertising. Jerzy might also be able to tell you if there is a source for such parts here in Europe. 

William 

[jaapv]

It should not be too difficult to have them copied by a specialist workshop. Removing the broken bit should be feasible. 

[beoon]

1 minute ago, jaapv said:

It should not be too difficult to have them copied by a specialist workshop. 

Thanks, yes I will investigate that option.

The pins are 2.5mm diameter bar and 4mm long excluding the threaded section, so making them should not be too difficult.

Amazon can supply the 2.5mm diameter steel bar and also a Tap and die set in small metric sizes

[jaapv]

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Not convinced that all threads from that time are standard metric. But you can always retap the threads.

[jerzy]

Alan, PM me if you will not be able to locate missing parts., I think I have them. But pls be aware that I am in Austria, so you might need to pay import tax

[derleicaman]

I would also suggest contacting David Stephens at Leica Store Manchester. He just acquired a mass of Leica parts. He is now sorting through them.

[beoon]

9 minutes ago, derleicaman said:

I would also suggest contacting David Stephens at Leica Store Manchester. He just acquired a mass of Leica parts. He is now sorting through them.

Hi Bill, I checked with David earlier but no luck for these earlier parts 

[beoon]

53 minutes ago, jerzy said:

Alan, PM me if you will not be able to locate missing parts., I think I have them. But pls be aware that I am in Austria, so you might need to pay import tax

Thank you Jerzy, can you check if you have these please?

I actually referred to the Schafer drawings of 1924 & 1927 as they show a cross section through these parts. Gianni Rogliatti reproduced these drawings in 1980 and I have a set of them. The 1924 drawing has the item number from the Bill of Material list

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[jerzy]

Alan, I think your canera has been "updated". All 4 digit that were not updated that I have seen have just one row of sprockets. As per factory notes double rows have been implemented starting 11500. Left one on the photo below is such with one row. As you mays see as well  the photo, the drums with double rows differ  as well, pin length and shape differ. Most probably you would need the one most right. 
I cannot find at a moment the other gear with the broken pin. But if you have possibility to manfuacture the pin(s) I think it would be simpliest. I may give you some guidance re dimensions. And I would not care about the thread, in the worst case you may cut a new one, a bit bigger

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Edited May 5, 2024 by jerzy

[willeica]

1 hour ago, jerzy said:

Alan, I think your canera has been "updated". All 4 digit that were not updated that I have seen have just one row of sprockets. As per factory notes double rows have been implemented starting 11500. Left one on the photo below is such with one row. As you mays see as well  the photo, the drums with double rows differ  as well, pin length and shape differ. Most probably you would need the one most right. 
I cannot find at a moment the other gear with the broken pin. But if you have possibility to manfuacture the pin(s) I think it would be simpliest. I may give you some guidance re dimensions. And I would not care about the thread, in the worst case you may cut a new one, a bit bigger

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 Alan, this post from Jerzy rang a bell for me. There were changes at 2400 and 11500 as indicated below. While I can't say that I am totally familiar with them, you may find this useful. Is your camera below 2400?

William 

[beoon]

1 hour ago, jerzy said:

Alan, I think your canera has been "updated". All 4 digit that were not updated that I have seen have just one row of sprockets. As per factory notes double rows have been implemented starting 11500. Left one on the photo below is such with one row. As you mays see as well  the photo, the drums with double rows differ  as well, pin length and shape differ. Most probably you would need the one most right. 
I cannot find at a moment the other gear with the broken pin. But if you have possibility to manfuacture the pin(s) I think it would be simpliest. I may give you some guidance re dimensions. And I would not care about the thread, in the worst case you may cut a new one, a bit bigger

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Thank you very much for this information, yes, the drum looks like the one indicated by you on the right hand side

I had assumed the pin on my drum had been damaged as there is a bit taken out at the end, but it looks like the "flat" on the pin has been machined at the factory.

So the existing pin might actually be good to go and not need replaced, I just assumed it was damaged at the end of it.

A picture of the associated gear & pin would be helpful if possible

[beoon]

38 minutes ago, willeica said:

 Alan, this post from Jerzy rang a bell for me. There were changes at 2400 and 11500 as indicated below. While I can't say that I am totally familiar with them, you may find this useful. Is your camera below 2400?

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William 

Hi William

Thanks for the photos. I actually have this book but forgot to consult it!!!!

You are lucky, you have an English language version (mine is German) and the technical translation can be a hit or a miss.

I noticed they quote the change from serial number 2,400. My camera is just below the 2,400 and given that the serial number is approximate its probably been built with this updated drum?

Alan

Edited May 5, 2024 by beoon

[willeica]

28 minutes ago, beoon said:

Hi William

Thanks for the photos. I actually have this book but forgot to consult it!!!!

You are lucky, you have an English language version (mine is German) and the technical translation can be a hit or a miss.

I noticed they quote the change from serial number 2,400. My camera is just below the 2,400 and given that the serial number is approximate its probably been built with this updated drum?

Alan

Alan, I may be wrong, but it seems to implied here that cameras below 2400 had two sets of sprockets. Correct me if I am wrong. 
 

William 

[beoon]

10 minutes ago, willeica said:

Alan, I may be wrong, but it seems to implied here that cameras below 2400 had two sets of sprockets. Correct me if I am wrong. 
 

William 

Yes, you are correct, the Schafer drawings show 2 sets of sprockets.

I will send you an email later, if that's okay with you?

[willeica]

5 minutes ago, beoon said:

Yes, you are correct, the Schafer drawings show 2 sets of sprockets.

I will send you an email later, if that's okay with you?

That is fine, Alan. I have two I As below 2400 that I can check visually and then a number between 2400 and 11500 that I can also check. I have forgotten which ones require the shutter button to be held down on rewind, but you probably know that. 
 

William 

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[jerzy]

yes, William, I missed it. I had once 12xx on my table, it has 2 rows, so it confirms whatr yozu wrote. Regarding rewind - both will require pressing release, valid for all cameras having part like this

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modfied cameras and all above 15700 have a sleve pushed on this part (and some other parts modified) to uncouple transport when lever i R position.

Back to the pin - this is from my 34xx, (still waiting for assembly), dimensions may differ a bit from your 4 digit.
Pin on sprocket drum is 2,5mm in diameter and 4,6mm long on drums with one row and 3,85mm long on drums with 2 rows (this is L1 on the photo). But again - your may differ and this is not so critical. Important is that with depressed release there is a space approx 0,5mm between the pins and if release is released the pin on the gear must stay within the flat part of the pin on sprocket drum. Pin on the gear is 2mm in diameter but igt is flattened, if not it will conflict with other gears. So this gives you indication how long this pins shall be. On my parts (sprocket drum with one row  and L1 of 4,6mm) the pin on the gear is 2,4mm long (L2). In your case, if pin on sprocket drum has another lkength you might need as well another L2. But i hope that my explanations are clear.

[beoon]

19 hours ago, jerzy said:

yes, William, I missed it. I had once 12xx on my table, it has 2 rows, so it confirms whatr yozu wrote. Regarding rewind - both will require pressing release, valid for all cameras having part like this

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

modfied cameras and all above 15700 have a sleve pushed on this part (and some other parts modified) to uncouple transport when lever i R position.

Back to the pin - this is from my 34xx, (still waiting for assembly), dimensions may differ a bit from your 4 digit.
Pin on sprocket drum is 2,5mm in diameter and 4,6mm long on drums with one row and 3,85mm long on drums with 2 rows (this is L1 on the photo). But again - your may differ and this is not so critical. Important is that with depressed release there is a space approx 0,5mm between the pins and if release is released the pin on the gear must stay within the flat part of the pin on sprocket drum. Pin on the gear is 2mm in diameter but igt is flattened, if not it will conflict with other gears. So this gives you indication how long this pins shall be. On my parts (sprocket drum with one row  and L1 of 4,6mm) the pin on the gear is 2,4mm long (L2). In your case, if pin on sprocket drum has another lkength you might need as well another L2. But i hope that my explanations are clear.

Jerzy, thank you for this very detailed information.

Last night I measured the existing pin on my drum (with 2 sets of sprockets) and it would appear to be the same dimensions as you drum with 2 sprockets.

Diameter 2.5mm and 3.85mm long

The pin that has sheared off the gear looks like it was 2.0mm diameter, but length unknown since it is missing.

Would it be possible to measure the length of your pin on the gear associated with the 2 sprocket drum?

Thanks

Alan