Started the day with doing more work on the remake of the crown wheel hub. Basically this just involved straightening the metal out a bit more, balancing the center, etc... After that, I punched the hole for the arbor. If you look carefully on the anvil, you might see a white line. This was used to ensure the spokes were square.
It is not important that the arms are of different lengths as they will be trimmed later on.
After looking at the state of things, I decided that it was necessary to add a washer between the crown wheel and the smaller gear that contacts the main wheel. If I didn't do this, I would have no end of problems down the road as the crown wheel and main wheel would contact and possible stop the clock. If I recall on the original there was a similar washer.
Unfortunately there was not enough room on the arbor for the washer. So I had to lengthen the portion of the arbor that holds the crown wheel. These pictures are before and after. Notice on the left that there is an additional 1/2" of the square portion of the arbor.
You may also notice that reworking the arbor meant that it grew an extra 1/4" to 1/2" on the right side. That will be corrected on another day.
Then it was time to make the washer. This was simply a matter of punching an arbor hole in a piece of metal then making it round. This picture shows trimming the corners to round it up a bit. After that, I did a bit of grinding and filing to round it up more.
After finishing the washer, I needed to punch a slot in the arbor for the crown wheel. This allows to insert a pin for to hold everything on. I forgot to take some pictures until I was almost done. This slightly out of focus picture shows the pin going through the arbor. To the right of pin there is the hub for the crown wheel, then the washer, then the smaller gear wheel (no teeth on it yet.)
Saturday, September 27, 2008
Good day
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