A small auxiliary or intermediate shaft in machinery.
- ‘Using Dave's lathe, we made a new coupler that would keyway inside our fulcrum and jack shafts. This removed much of our runout.’
- ‘The tip jack shaft comprises at least one group of contact links which are arranged in a comb-type manner on the wide side of the tip jack shaft.’
We take a look at several popular, though confusing, punctuation marks.