Selection Chart Intro Center Drills CD-A CD-SL CD-R AUCES AUCDS MHCDS NC-SD V AUPEQ HSS HSS HSS HSS COATING HSS COATING HSS-Co COATING HSS-Co COATING HSS COATING SP SL PO ST ROLL DIN YMW DIN YMW YMW YMW YMW YMW 616 619 617 621 623 625 627 629 Vc (m/min) P1 H H H H H H H CARBIDE P2 H H H H H H H H P3 H H H H H H H H P4 H H H H P5 H P6 LONG P7 I I I H I H H P8 M1 I I I H I H H M2 I I I H I H H M3 HAND K1 I I I I H H H TAPS K2 I I I I H H H K3 K4 N1 I I I H I H H EG (STI) N2 IN3I II II HH II H HHH N4 I I I H I H H N5 SPECIALTHREADS,GAUGESS1 (<25 HRC)S2 (<35 HRC)S3 (35 ÷ 45 HRC)S5 H (45 ÷ 55 HRC) H (55 ÷ 63 HRC) THREADMILLS H 1st choice I suitable DIES CENTER DRILLS Technical info 614