A gear is a rotating circular machine part having incising or, in the case of a cog or bull gear, inserting teeth (called a cog) which meshes with another (compatible) toothed part to transmit (convert) torque and speed. The fundamentals behind how gears work are similar to the fundamentals of a lev

As the market (such as the automotive industry) continues to put forward new and higher requirements for gear measurement, gear measurement accuracy projects should also continue to develop, and gear measurement instruments should also be innovated to continuously enhance measurement capabilities to meet new needs.