Smoothness Of Drilled Holes. Again drills resharpened on the Darex SP2500 performed flawlessly. Drill point accuracy is an important factor in hole smoothness. Darex builds the SP2500 to meet demanding concentricity levels. Additionally, the large flute margin size of the MJDM drills contributes to hole smoothness.
Conventional drills produce long curly chips.
Because of their length, they tangle up in the spindle or work piece. As with new MJDM drills, old MJDM drills resharpened on the Darex SP2500 produced short broken chips. The short chips permit automated drilling operations because no operator needs to unravel stringy long chips. The SP2500 proved easy to operate by people of every skill level. Even severely damaged drills regained equal to new performance once resharpened on the SP2500.