An intermediate shaft between the powered and driven shafts in a belt drive.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "countershaft" in a sentence
"Suzuki fine-tuned the R450 for 2009 by adjusting the ECU programming and cam profiles to make the engine perform even better at low - and mid-rpm range and also added a new countershaft for improved gear-shift feel."
"The countershaft rests in self-adjusting boxes, and has a tight and"
"There is also an overhead countershaft with strap shifting arrangement."