First Time and Why?

dickstorer

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Oct 19, 2010
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IMG_7727.jpg the wheel on the left is from a URGOS 9 tube movement. The mov't number is 03038B, there is another number--247483--that I am not sure about. As you can see the left escape wheel is very worn and completely un usable, the one on the right is its replacement. My question is why? I have been doing this for almost 50 years and this is first time I have seen this. There is no wear on the pallets and the pallet bridge is not adjustable so I am wondering how it happened/

Dick Storer
 

shutterbug

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Maybe the victim of an anchor removal without letting down the power?
 

dickstorer

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The owner stated that it had run for several years after its previous repair so I think that rules out SB's theory. And the bushings are OK It is running great with its new escape wheel
Looking at the worn wheel really close shows the teeth are not all worn off uniformly.

Dick
 

Steven Sandberg

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Oct 16, 2010
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With the tooth damage being so non uniform it sure looks like some abuse rather than normal wear. May be the second hand if it has one was forced around damaging that sector? It is common to see that model have teeth worn so the escapement action is unacceptable but that is uniform around the wheel. How was the clock running prior to you seeing it, running way fast?

Steven Sandberg
Malaga WA
 

dickstorer

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Steven,
Yes it was extremely fast. When I first looked at the clock it was not running, so I just gave the pendulum a little swing and noticed the second hand advancing at a rapid rate. With the amplitude as short as 1/2 it would still skip teeth. That is when I removed the weight, I did not want to damage it further. Customer stated that it had not been running for some time but that it ran for several years after its previous repair. I am eager to know how it wore the way it is.

Dick
 

dad1891

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Feb 28, 2014
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I have been told that problems with Urgos escape wheels are not that uncommon. The way it was described to me looked exactly like the EW in your photo. I would think that lubrication (or lack thereof) played some role in the failure.
 

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