More clock shafts

After my previous success drilling a tiny but deep hole through some brass rod, I got thinking about how to machine the outsides. Referring back to my diagram the idea was to take a 4mm rod and machine most of it down to 2mm.

But on reflection this seemed like a bad idea so I decided instead to start with a thinner rod and add a bush to mount the gear wheel. I found some 2.4mm copper coated welding rod. I initially tried machining the copper coating but the rod was bending in the lathe and did not produce a good finish. However I discovered that the soft copper coating was quite thin and was easily removed when polished with some emery cloth.

A brass bush was drilled and turned so that it was a tight fit on the welding rod and also a good fit for the plastic gear.

Here’s the redesigned shafts, the lengths have still to be determined.

One thought on “More clock shafts

  1. […] a couple of different ideas on how these might work. I went with something roughtly like my second spindle design and that’s worked out […]

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