The development history of cemented carbide rotary files:

Until the mid to late 1980s, most of the rotary files were all manufactured by hand. With the increasing trend of CNC machining technology on computers, automation technology and equipment have just begun to become popular. With the help of them, they can engrave the rotary file of all groove styles with official seals, and can integrate them into actual drilling regulations according to the trimming of the tail. At this stage, the rotary files with the best characteristics are manufactured by CNC machine tools on a computer.

Cemented carbide rotary files have several key characteristics as follows:

(1) Various metal materials (including hardened steel) and non-metal materials (such as natural marble, jade, bone) below HRC70 can be drilled and processed at will.

(2) In a huge part of the work, it can replace the small grinding wheel with handle, and the dust-producing environment will be polluted.

(3) The production efficiency is high, and the processing efficiency is dozens of times higher than the processing efficiency of hand-made blades, and the processing efficiency is nearly ten times higher than that of the small grinding wheel with handle.