depth of cut (in) depth of cut (mm) WIDIA™ • Inserts for Machining Aluminium Non-Ferrous Materials • Aluminium Alloys Step 1 • Select the insert geometry Positive Inserts feed rate (mm/rev) AL1 AL3 feed rate (in/rev) Step 2 • Select the grade Positive Insert Geometry cutting condition -AL1 -AL3 heavily interrupted cut HCK10/HWK10 HCK10/HWK15 lightly interrupted cut HCK10/HWK10 HCK10/HWK15 varying depth of cut,casting, or forging skin HCK10/HWK10 HCK10/HWK15 smooth cut, pre-turned surface HCK10/HWK10 HCK10/HWK15 Step 3 • Selecting the cutting speed Low-Silicon Aluminium Alloys (hypoeutectic <12,2% Si) and Magnesium Alloys speed — m/min Starting Conditions Material Group grade 250 500 750 1000 1250 1500 1750 2000 2250 2500 m/min N2 HCK10 550 High-Silicon Aluminium Alloys (hypereutectic >12,2% Si) and Magnesium Alloys speed — m/min Starting Conditions Material Group grade 250 500 750 1000 1250 1500 1750 2000 2250 2500 m/min N3 HCK10 550 B152 widia.com