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Copy Mills • M170 ™ Series Additional Application Advice • RD12T3.. 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% Example application highlighted. 100% Ap1 = 1mm 1,01mm 0,77mm 0,63mm 0,55mm 0,49mm 0,35mm Ap1 = 2mm 0,77mm 0,55mm 0,45mm 0,39mm 0,35mm 0,24mm Ap1 = 3mm 0,63mm 0,45mm 0,37mm 0,32mm 0,28mm 0,20mm Ap1 = 4mm 0,55mm 0,39mm 0,32mm 0,27mm 0,24mm 0,17mm Ap1 = 5mm 0,49mm 0,35mm 0,28mm 0,24mm 0,22mm 0,15mm Ap1 = 6mm 0,45mm 0,32mm 0,26mm 0,22mm 0,20mm 0,14mm 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 = RDPX12T3M0SN Edge Geometry MM ae>50% Recommended starting Ap1 = 2mm Edge Geometry MH ae>50% Recommended starting Ap1 = 2mm min med max – – – min med max min med max 0,24mm 0,30mm 0,50mm 0,24mm 0,40mm 0,60mm 0,24mm 0,30mm 0,50mm 0,24mm 0,40mm 0,65mm 0,24mm 0,50mm 0,70mm 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 L/D ratio % of Ap1 max to reduce % of vc to reduce <2 0% 0% 24 80–95% 20–40% L D L D Recommended Cutting Conditions • Helical Interpolation from Solid min hole diameter max hole diameter (fl at bottom) Ap1 max per revolution max ramp angle Ap1 max when plunging 24 25,6mm 36mm 1,3mm 15° 3mm 32 40,6mm 52mm 5,3mm 12° 4,4mm 35 46,9mm 58mm 6mm 11° 3,9mm 40 57,4mm 68mm 6mm 9.3° 3,3mm 42 61,2mm 72mm 6mm 7.2° 3,5mm 50 77,4mm 88mm 6mm 6.1° 3,5mm 52 81,3mm 92mm 6mm 4.5° 3,2mm 63 102,4mm 114mm 6mm 4.5° 4,6mm 66 108,5mm 120mm 6mm 4.5° 4,4mm 80 136,5mm 148mm 6mm 3.5° 4,2mm 100 176,5mm 188mm 6mm 2.2° 4,2mm widia.com D Cutter Diameter Hole Diameter M65 cutter diameter