Tapping machine is driven by compressed air, vane type pneumatic motor to operate. It used materials such as steel, iron, copper, plastic etc. tapping, so tapping is no longer a difficult task. Tapping machine with universal device, can implement vertical and horizontal universal tapping; Use straight shank type handle and single gun pull control, the entire machining process according to the switch, automatic feed, do not need to push tool auxiliary processing; Also have the same routine automatic high-speed reverse mechanism, on the way back just hold positive &negative switching at the same time, the chuck even tap automatic high-speed reverse screw hole. The structure of tapping machine is very simple, operate more easily. And its high reliability, long durability, tap is not easily broken, because of the protective torsion.
Before tapping, there is one thing that is to be done, that is to select the diameter of the bottom hole. Because when tapping, screw tap not only plays a part in cutting, but also to produce extrusion materials, so the top thread will highlight part, and the material plasticity is big, the squeeze highlight will be more; If thread crest and tap root don’t have enough space, can make the tap stuck. So before tapping the choice of bottom hole diameter should be greater than standard thread inner diameter, so that you can get the complete thread, also avoids the waste of materials, greatly improve the efficiency of the tapping machine tapping.