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Copy Mills • M170 ™ Series Additional Application Advice • RD1003.. Selecting the Correct Cutting Values 1. fz depends on the Ap1 and ae values With round inserts, two factors can affect the hm: Ap1 and ae. fz has to be adjusted accordingly. Recommended Starting Feed Rate Values (fz) Related to the Ap1 and ae Values: ae engagement 10% 20% 30% 40% 50% 100% Ap1 = 0,5mm 1,18mm 0,70mm 0,63mm 0,56mm 0,50mm 0,35mm Ap1 = 0,75mm 0,95mm 0,62mm 0,56mm 0,50mm 0,45mm 0,30mm Ap1 = 1mm 0,80mm 0,57mm 0,46mm 0,40mm 0,36mm 0,25mm Ap1 = 2mm 0,57mm 0,40mm 0,33mm 0,28mm 0,25mm 0,18mm Ap1 = 3mm 0,46mm 0,33mm 0,27mm 0,23mm 0,21mm 0,15mm Ap1 = 5mm 0,36mm 0,25mm 0,21mm 0,18mm 0,16mm 0,11mm Example application highlighted. Example Cutting Conditions for RD..10... Insert in Pocketing, L/D ratio = 2 x D: TN2505 TN6525 TN6540 feed per tooth fz (mm)/ae>50% insert = RDPX1003M0SN Edge Geometry MM ae>50% Recommended starting Ap1 = 1mm Edge Geometry MH ae>50% Recommended starting Ap1 = 1mm min med max – – – min med max min med max 0,25mm 0,30mm 0,40mm 0,25mm 0,32mm 0,45mm 0,25mm 0,32mm 0,40mm 0,25mm 0,35mm 0,55mm 0,25mm 0,45mm 0,65mm 2. Ap1 and vc corrections depend on L/D ratio With increasing L/D ratios, or overhang, vibrations can occur due to reduced rigidity. To ensure successful application, it is recommended to adjust Ap1 and vc values according to the following table: L % of Ap1 max to reduce L/D ratio % of vc to reduce <2 0% 0% 24 80–95% 20–40% L D L D Recommended Cutting Conditions • Helical Interpolation from Solid D max hole diameter (fl at bottom) Ap1 max per revolution max ramp angle Ap1 max when plunging 20 22mm 30mm 2,1mm 20° 4mm 22 24mm 34mm 2,1mm 20° 2,4mm M58 25 33mm 40mm 3,2mm 8° 1,7mm 28 36mm 46mm 5mm 15° 3,8mm 30 40,6mm 50mm 5mm 10° 3,4mm 35 50,7mm 60mm 5mm 8,5° 3,4mm 40 60,5mm 70mm 5mm 7,2° 3,6mm 3,6mm 42 64,5mm 74mm 5mm 5,8° 50 80,3mm 90mm 5mm 5,2° 4mm 52 85,8mm 94mm 5mm 3° 2,2mm Cutter Diameter Hole Diameter widia.com cutter diameter min hole diameter