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Barrel Help

JTravis

By JTravis
in Watch Repairs Help & Advice

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JTravis Member

JTravis

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Hello all, this is my first question post.  I did introduce myself in the other section though.  I have been practicing repairing on a lot of old 50s junk watches.  This way I don't feel bad if I break them.  This is the second time I have come across this issue.  After I strip, clean, oil and reassemble these watches, everything works well except the hour and minute hand do not move, or move very little.  The amplitude is fine and the second hand is keeping good time.  I think it might be because of the strange additional gear on the barrel in the picture I have provided.  It is attached to the bottom of the barrel arbor and is friction fit.  The barrel teeth drive the second hand and the balance, and this additional gear then drives motion works.  I think that because it is friction fit, it is slipping too easily and that the friction of the motion works is stronger than the friction of this gear.  Has anyone seen this before?  Should I put some sort of breaking grease on it to make it not turn as easily?  I am guess this is what prevents the pulled out crown from affecting the mainspring.  Any insight would be welcome.

 

DSC_0092 (2).jpg

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Nucejoe Distinguished Member

Nucejoe

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Please do always provide the caliber. 

The seconds hand moving indicates the movement run is runing, hr and minute hands not moving or move little, points out to loose canon pinion.

Check and tighten the canon pinion.

 

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JTravis Member

JTravis

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Here are a couple more pictures.  Yes these movements don't even have jeweled pallets, just metal spikes, and only one jewel.  I figured they aren't worth restoring, but they seem great to learn on.  Every time I try and look up one of the companies online there is little information and they all say "mass produced swiss movements rebranded."  I will definitely open it back up and give the pinion a try.  I had just not seen that extra gear on the barrel in any of the youtube videos I have described and it seems part of the movement works.  Thanks for taking the time to respond.

DSC_0077.jpg

DSC_0075.jpg

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JTravis Member

JTravis

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I just took the watch apart again and its not the canon pinion.  There is no through pivot on this watch so the canon pinion just sits on static metal, its the weird extra gear that is supposed to drive it.  I put a small mark on it and left it for a while and that gear is not turning at all despite being attached to the barrel.  I think I just need to somehow increase the friction of that gear so that it only slips when setting the time, but not when the watch is ticking.

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JTravis Member

JTravis

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I figured out that it was a Baumgartner 866 movement.  I found a site that said this: "indirect minute, hand friction clutch on barrel (Roskopf type)"

So, I think what i am going to do is peen the inner ring tomorrow so it presses more firmly on the the friction fit gear.  That should increase the friction in the same way tightening a canon pinion would do.  I will post pictures.  Luckily I have a scrap barrel to practice on.  I'm not sure how "tight" a perfect canon pinion feels, but I'm guessing its something like "it turns, but only if you put some work into it."  I am still very new at this hobby.

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JTravis Member

JTravis

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So, one hit with the hammer and pin and the gear turned much more tightly. Once I put it all together it work as expected with the hour and minutes turning properly.  So, for this kind of movement, its the gear on the barrel that needs to be tightened instead of the canon pinion.  The watch is running very fast, but that is a whole different problem.  Thank you to everyone that responded.

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