Friday 23 October 2009

The Wheels

Seven wheels are cut out of 1/16" Compo brass sheet with a bandsaw. Then turned down to exact measurements on the lathe. The Centre will have 60 teeth and is 1.975" Diameter. 3rd has 56 teeth at 1.849" Dia. Also the Pin wheel has 56 teeth at 1.849" Dia. The Scape has 30 teeth at 1.650" The Pallet has 49 teeth at 1.628", the Warn has 42 at 1.408" the Hour has 72 teeth at 2.353".
There are then two Minute wheels (one for going in reverse) made out of 3/32" material. They have 39 teeth at 1.313" Diameters.
The Centre, 3rd, Pin, Pallet and Warn are pierced out with a jewellers/piercing saw. to have four crossings/spokes each. You can saw and file this to taste bearing in mind the centre bore hole is 3/16", and the Pin wheel has extra 'meat' to house the pins for the Bell hammer tail.

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