Mainly used within 5mm sheet steel drilling, a drill bit can replace the use of multi-branch;according to the needs of different diameter hole, and can achieve big hole to complete a one-time processing, without having to change the drill bit and hit the positioning holes and so on.
The ladder of its unique structure, a bit can open a variety of specifications of aperture.
Do not need to use center punch, compared with the ordinary twist drill is not easy to be broken.
Deburring, chamfering, elliptic hole enlargement, twist drill, the function of them was unable, but it is possible.
The overall ladder drill using CBN grinding whole manufacturing, the main material for high-speed steel, carbide, high precision machining,according to different processing conditions can be surface coating to extend tool life, add to enhance durability.