Vc (m/min)Cutting speed Wear (mm) Drilling MagicDrill DRV Applicable inserts 3 CVD insert on the outer edge for highly efficient drilling Inner edge: PVD (PR1535. Outer edge: CVD (CA520D/CA415D) High speed and highly efficient machining available with the combination New grades developed for drilling Of CVD (Outer edge) and PVD (Inner edge) inserts. Recommended cutting speed (Maximum value) Wear resistance comparison (Internal evaluation) 300 UP 280 0.4 DRV (CA520D ) 200 55% 0.3 Competitor F (CVD) 180 Competitor G (CVD) 0.2 100 0.1 0 CVD (CA520D ) PVD (PR1225) 0 10 20 30 40 50 Cutting time (min) Drill dia. ø20(3D) workpiece material: S50C Cutting conditions: Vc = 200 m/min, f = 0.12 mm/rev, Drill dia. ø20(3D) , wet workpiece material: SCM440H 4 Economical inserts with 4 cutting edges4 types of chipbreakers for various machining applications General purpose GM chipbreaker Tough edge GH chipbreaker K Chipbreaker for steel machining 1st recommendation for machining cast iron Stable deep-hole machining with low cutting force Good for continuous steel machining Reduced breakages common in through-hole machining A Edge shape optimized for B various machining applications Negative land with Strong edge A A-A Section B B-B Section Chip control comparison Comparison of remaining chips For stainless steel machining SM chipbreaker (Internal evaluation) (Internal evaluation) Stable chip control when machining Gummy stainless steel reduces chip Outer edgeClogging in the holder body DRV(SM chipbreaker) C Sharp cutting and Inner edge large rake angle Competitor I C C-C Section DRV (SM chipbreaker) Competitor H Remaining chips Cutting conditions: Vc = 100 m/min, f = 0.1 Mm/rev Cutting conditions: Vc = 150 m/min, f = 0.08 Mm/rev drill dia. Ø20(3d), drilling depth 60mm drill dia. Ø25(5d), wet workpiece material: sus304 drilling depth 98mm, wet workpiece material: SUS304 For machining soft steel XM chipbreaker Chip control comparison (Internal evaluation) Stable chip control of outer cutting edge Outer edge D E Excellent chip controlWith the changingInner edge Width of the chipbreaker D E D-D Section E-E Section DRV (XM chipbreaker) Competitor J Cutting conditions: Vc = 200 m/min, f = 0.12 mm/rev Chipbreaker selection reference Drill dia. ø16(3D), Drilling depth 48 mm Wet Workpiece material: SS400 K45