Drilling SPM stands for Drilling Special Purpose Machine, which is a type of machine used for drilling holes in various materials with high precision and efficiency. Drilling SPMs are designed to perform multiple drilling operations simultaneously, which saves time and increases productivity. The machine consists of various components such as a drilling head, a drill bit, a spindle, a workpiece holder, and a control system. The drilling SPM head can be adjusted to accommodate different drill bit sizes and angles, allowing the machine to perform a variety of drilling operations.