Watch and Clock Repairs

A few years back one of my interests was Watchmaking.

The following pictures are just a few that I rescued from my old web page.
I thought they might be interesting, engineering in miniature.

A German Boley Lathe driving an Antique "Pivot" drilling  tool.The match is just to show the scale

Close up. we're going to drill a tiny hole down the end of the pinion, this will allow us to insert a new pivot. this is one of the more difficult repairs in clock and watch making.

This is a "Solid Tungsten Drill" very small, the part I'm holding is 3mm wide.

Another view, drilling a balance wheel for a new pivot. This little tool is over a hundred years old, it was normally driven by a "bow". I now drive it from my lathe. The little "o" ring rubber belt will slip if you apply too much pressure, which is just perfect. 

This tool is know as a "jacot tool". We use it to "size" and "Polish" pivots. It's being used here on a carriage clock pivot. This tool is driven by some thread and a rubber band, again a bow would have originally been used .

This is a "fusee" wheel from a 19th century pocket watch. The chain is just like a miniature bike chain. The cone shape was used to compensate for uneven main spring pressure.

"Fusee" and Spring Barrel with chain

Repairing a Fusee Chain is really difficult, so small. You need
To make special tools.

We need to make a rivet to join these together.

Riveting the chain