Making copies! That’s what I think every time I need to make a part for a typewriter. Today, I machined a piece that hangs from the right margin stop of a Royal HHE. This little thing hangs like a pendulum and activates the bell clapper. Yep, that’s all it does. To make matters worse, it is an oblong shape that needs to balance freely.
To compensate for the weight difference between the original steel part (being duplicated in brass) the replacement has slightly wider lobes. When they hang side by side, they react identically.
Finished, ding . . . ding . . . ding . . .