Thursday, January 1, 2015

Center wheel and pendulum arbor

I modified the plans for the center and pendulum arbors to fit the dimensions of the frame, now that the frame has been constructed.
As noted on the previous iteration of the plans, one end of the center arbor is supported by a thrust bearing of the kind manufactured yesterday.  The other end is supported by a ring.  The ring was cut from 1/4" brass rod, after being center drilled with an 11/64" hole.  The ring was made 3/8" long, and afterwards the edges were deburred in the lathe with the graver.  The center arbor itself was cut as per the plan above.  The arbor and bearing are shown below.
The arbor was fitted to the center wheel...




and test-fit in the frame with the other wheels.



I had to file the third wheel pinion to ensure smooth rotation, because it looks like the depth of the center wheel is slightly off.

Here's the pendulum arbor attached to the anchor.


And the pendulum in place engaging with the escape wheel.

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