Many amateurs suffer from extreme lack of tools and cannot justify the
purchase of specialist ones at the start. In particular, cutting broaches are
hard to choose. You will need broaches to suit any bushes you fit.
Looking at bush size charts you will see many sharing the same outside
diameters. For example, many have outside diameters of 4.50mm. Looking at a list
of broaches, number 14 in the Stubbs gauge has a maximum working diameter of
4.57mm. This broach will enable you to fit this bush with ease.
Simply
repeat this exercise for any bushes you expect to fit. Broaching the inside of
new bushes will depend on the pivots themselves. You will need to buy several
for your first clock, but as your range builds up, you will be able to bush
almost anything from stock. The reason no one sells 'all the broaches you're
likely to need' is because this depends on the kind of clocks you work on.
Carriage clocks use a quite different range to longcase clocks.
Repairing Your Own Clocks by Mervyn Passmore