How to choose the self feeding drilling unit model

The following points should be paid attention to when choosing the type of self feeding drilling machine according to different conditions:
1.What is the diameter of the borehole?
2.What is the depth of the borehole?
3.What is the material of the workpiece to be processed?
4.What is the way to install it? Horizontal, vertical, upright or oblique.
5.What is the speed (cutting speed) requirement?
6.What is the required voltage? The standard is 3 phase 380V, 50Hz.
7.What is the form of chuck? Such as drill chuck or ER chuck.

Self feeding drilling unit is suitable for small holes, small feed force, high rotation speed and light weight. It is very convenient to use, but it can not process hard materials.