Penetration Rate Calculations for Deep Hole Drilling
The Basic Calculation Penetration rate is the speed at which the drill advances into the material, expressed in mm per minute. The formula is straightforward and I use it on every job: Penetration rate (mm/min) = Feed rate (mm/rev) x Spindle speed (RPM) For a 10mm gun drill running at 2500 RPM with a feed of 0.04 mm/rev: 0.04 x 2500 = 100 mm/min To estimate the drilling time for a 500mm deep hole: 500mm / 100 mm/min = 5 minutes of actual cutting time ...