Through-Tool Coolant vs Flood Coolant for Deep Hole Drilling
Through-tool coolant delivers coolant through the center of the drill directly to the cutting edge. Flood coolant sprays coolant over the outside of the drill and relies on flow to reach the cutting zone. In deep hole drilling, the choice between these two methods determines whether the process succeeds or fails. How Through-Tool Coolant Works For gun drilling, through-tool coolant is essential. Coolant enters through a rotating union at the spindle, travels down the center of the gun drill tube, and exits at the cutting edge. The coolant cools the cutting edge and then flushes chips back along the external flute of the drill. ...