It is suitable for the installation and disassembly of drill bits of various drilling machines.  Installation and disassembly are convenient and reliable.

1. Drill bit installation

Slowly lift the drill box body, put the four legs of the drill box body into the four holes of the rotary table of the drilling machine correspondingly, select the corresponding drill box core plate according to the specifications of the drill bit, lift the drill box core plate into the drill box body, then place the drill groove to be installed into the drill box core plate corresponding to the convex tip of the drill box core plate, place the drill bit into the drill box, and the drill bit is clamped in the rotary table center.  Then screw on the drill bit, connecting nut and drill rod in turn.

2.Disassembly of drill bit

Lift the drill rod (with drill bit attached), connect the drill bit box body with the rotary table as required in article ①, slowly lift the drill rod so that the drill bit groove corresponds to the convex tip of the core plate of the drill bit box, clamp the drill bit in the drill bit box, and withdraw the drill rod and drill bit in sequence