The definition of a countershaft is a middle shaft that brings motion from the main shaft to a working part of a machine.
An example of a countershaft is a part of a factory tool that carries motion from the main shaft to the machine's functional part.
an intermediate shaft that transmits motion from the main shaft of a machine to a working part
An intermediate shaft between the powered and driven shafts in a belt drive.
- A common arrangement for driving a lathe spindle, in either direction at several definite speeds, is to provide a countershaft on which are mounted two fixed pulleys and two loose pulleys to accommodate two driving belts from the main shaft, one of which is open and the other crossed.
- Motion in either direction is thereby obtained, and a considerable variation in the speed of rotation can be obtained by providing a cone pulley on the countershaft, which drives the cone pulley secured to the lathe E FIG.