depth of cut (in) depth of cut (mm) depth of cut (in) depth of cut (mm) WIDIA™ VariTurn™ Steel • Carbon, Alloy, and Tool Steels up to 450 HB (48 HRC) Step 1 • Select the insert geometry Negative Inserts Positive Inserts feed rate (mm/rev) feed rate (mm/rev) 2P 1P Finishing Finishing 6P Roughing 7N feed rate (in/rev) feed rate (in/rev) Heavy Roughing Step 2 • Select the grade Negative Insert Geometry Positive Insert Geometry cutting condition 2P 6P 7N 1P heavily interrupted cut TN30P TN30P TN30P TN30P lightly interrupted cut TN20P/TN30P TN20P/TN30P TN20P/TN30P TN20P varying depth of cut,casting, or forging skin TN20P/TN30P TN20P/TN30P TN20P/TN30P TN10P smooth cut, pre-turned surface TN10P TN10P TN10P TN10P (continued) B112 widia.com