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Perçage twou fon Ekspansyon Perçage Forage Sant Perçage Perçage twou
Deep hole drilling
Deep hole drilling usually refers to tools that process holes with a ratio of hole depth to hole diameter greater than 6. Egzèsis zam souvan itilize, BTA egzèsis twou byen fon, jè egzèsis, DF gwo twou san fon egzèsis, elatriye. Trepanning drills are also commonly used for deep hole machining.
Aléseur
The reaming drill has 3 to 4 cutter teeth, and its rigidity is better than that of the twist drill, which is used to expand the existing holes and improve the machining accuracy and finish.
Countersink
The countersink drill has more cutter teeth, and the hole end is processed into the required shape by forming method, which is used to process the countersunk holes of various countersunk screws, or to flatten the outer end surface of the hole.
Center drill
The center drill is used for drilling the center hole of the shaft workpiece. It is essentially composed of a twist drill with a small helix angle and a countersink drill, so it is also called a compound center drill.
core drill
There is a hollow drill bit in the middle of the drill pipe, which is mainly used for drilling and coring.
