Use constant flow of coolant and clear chips frequently.
A steady pressure at 25 SFM (300 to 600 RPM) is recommended.
Material should be backed with wood or rubber for support during drill breakthrough.
Avoid vibration and excessive stress.
Keep drill sharp to avoid excessive pressure.
Warning: SOME PRODUCTS WE SELL MAY CONTAIN ONE OR MORE CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER, BIRTH DEFECTS OR REPRODUCTIVE HARM. For more information please visit https://oehha.ca.gov/proposition-65