Countershaft

ahd-5
  • noun. An intermediate shaft between the powered and driven shafts in a belt drive.
  • The Century Dictionary and Cyclopedia
  • noun. A shaft driven by a band or gearing running from another opposite and parallel shaft.
  • the GNU version of the Collaborative International Dictionary of English
  • noun. An intermediate shaft; esp., one which receives motion from a line shaft in a factory and transmits it to a machine.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • noun. A jackshaft.