9 Suitability and starting values for cutting speed (vc), feed (f) and depth of cut (ap). Refer to our Machining Calculator app for further calculations. Product RE P M K N S Hvcfapvcfapvcfapvcfapvcfapvcfap [mm] [m/min] [mm/tooth] [mm] [m/min] [mm/tooth] [mm] [m/min] [mm/tooth] [mm] [m/min] [mm/tooth] [mm] [m/min] [mm/tooth] [mm] [m/min] [mm/tooth] [mm] 7° E R geometry with sharp slightly positive design for light to medium machining. ZP 25ER-R M8345 – 180 0.45 1.3 105 0.41 1.3 – – – – – – 45 0.32 1.0 – – – ZP 32ER-R M8330 – 240 0.45 1.6 140 0.41 1.6 225 0.45 1.6 – – – 60 0.32 1.3 45 0.15 1.0 M8345 – 175 0.45 1.6 105 0.41 1.6 – – – – – – 40 0.32 1.3 – – – ZP 40ER-R M8345 – 170 0.45 2.0 100 0.41 2.0 – – – – – – 40 0.32 1.6 – – – ZP 50ER-R M8345 – 165 0.45 2.5 95 0.41 2.5 – – – – – – 40 0.32 2.0 – – – 571