齿轮和花键在各种机器中的使用极其广泛。加工齿轮必须在专用的切齿机床(如滚齿机、插齿机、剃齿机和齿轮磨床等)上用专用的齿轮刀具进行;在卧式铣床上,用分度头虽然也能加工齿轮,但精度较低,而且仍然需要专用刀具。如果使用中的机械某个齿轮损坏,而手头上又无专用刀具,机械设备 Gears and splines are used in a wide range of machines. Processing gear must be used in a dedicated gear cutting machine (such as hobbing machine, gear shaper, shaving machine and gear grinding machine, etc.) with a dedicated gear cutter; horizontal milling machine, although the indexing head can also process the gear, but the accuracy Lower, and still require special tools. If the use of a mechanical gear damage, and no special tools on hand, machinery and equipment