countershaft Mech.
(ˈkaʊntəʃɑːft, -æ-)
[counter- 8.]
An intermediate shaft driven from a main shaft for giving motion to a particular machine.
| 1864 in Webster. 1870 R. M. Ferguson Electr. 264 Both armatures are driven..by belts from the same countershaft. 1880 Spencer in Proc. Inst. Mech. Eng. 515 Nearly all mules are now driven by counter-shafts. |
So ˈcounterˌshafting.
| 1885 Law. Rep. 15 Q. Bench Div. 359 The mode of fixing main and counter shafting. |