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

There are two methods to measure the error of cylindrical gears and bevel gears: single measurement and comprehensive measurement.

In the field of mechanical engineering, precision measurement of gears and other parts is often required. A gear measuring instrument is an ideal tool for measuring gears. It can realize the partial measurement of gear inspection, and the whole process is completed on a single machine.