Calculation

Material removal rate tells you how much material is being removed per unit of time. It is useful for comparing tool performance, estimating cycle times, and spotting process problems. I calculate MRR on every new job to establish a baseline. I track MRR for each job and compare it to the baseline over time. A 20% decrease in MRR indicates tool wear or a process problem. A sudden drop often catches issues before the tool breaks. ...

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 ...