Illinois watch restoration part 6: refitting the impulse (roller) jewel

Рет қаралды 3,028

2 жыл бұрын

Here I shellac the impulse jewel from my Illinois Bunn Special back into its hole in the roller. This is a bit challenging because the hole is round, while the jewel is D-shaped.
When I first saw the jewel, I was sure I had the wrong jewel and the original had been lost. However in discussions online since shooting the video I have learned that sometimes watch companies did just make round holes because it was cheaper, and then fit a standard D-shaped jewel.
Thanks for watching, and happy shellacking!

Пікірлер: 11

@boydsargeant7496 2 жыл бұрын

Another fascinating and well described execution! Loving it!

@home-dp6oh 2 ай бұрын

I feel your pain brother. 2 things I hate the most: fitting roller jewels and hairspring work.....

@watchtock8818 2 жыл бұрын

Very nice. Thank you.

@WristwatchMedic1953 Жыл бұрын

Very informative video. I enjoyed it and learned a lot. Thank you

@timelyvintagewatches Жыл бұрын

Thanks Darryll, glad to hear it!

@Mars-zgblbl Жыл бұрын

Thanks for this. Any idea why the impulse jewel should be aligned at 90° to the balance arms? Provided the hairspring collet is aligned properly relative to the impulse jewel, the alignment of the balance wheel shouldn’t matter, unless this is a convention to make it easier to remember where the hairspring collet should be pointing.

@timelyvintagewatches Жыл бұрын

I agree this is likely just convention. I can't remember what I said in the video but I don't think I have ever heard a very compelling reason. One might be that you don't want the impulse jewel under an arm, because you may want to view the escapement action. Another would be that you want to do as little poising as possible, so you should put it back as originally constructed, i.e. 90 degrees from the arms. But I agree that is not in itself a compelling answer why it was set up that way in the first place.

@Mars-zgblbl Жыл бұрын

@@timelyvintagewatches That makes a lot of sense

@victorlozano7738 9 ай бұрын

Question: What kind of alcohol are you using on that video?

@ronperez9956 Жыл бұрын

Whoever build these watches to start with are genius. I mean who would think a wood finish (shellac) to mount a jewel is perfect. Then again I think who discovered shellac? Isn’t shellac bug guts? 😂

@timelyvintagewatches Жыл бұрын

Wikipedia says it is excreted by the female lac bug. Gross! Gross but useful! 😂