Fluid circulating apparatus for drill

A fluid circulating apparatus for a drill, the drill including a bit, a bit driving means that drives the bit to rotate, and a fluid inlet used to supply a coolant to the bit, whereby the drill cuts and drills an object to be drilled by rotating the bit while supplying the coolant to the bit,

• wherein the fluid circulating apparatus for a drill comprises:
• a suspension collecting means that collects a suspension derived from the coolant mixed with chippings through cutting and drilling operations;
• a suspension filtering means that filters off the chippings included in the suspension, thereby making the suspension back into the coolant to be stored in a reservoir;
• and
• a coolant supplying means that supplies the coolant obtained by the suspension filtering means and stored in the reservoir to the bit, and
• wherein the suspension collecting means includes a vacuum pump used to collect the suspension through a discharge channel from a water receiving pad so provided as to surround a point to be drilled, the vacuum pump changing a pressure in the reservoir to subatmospheric pressure.