External Tool Holder Series PSC Polygon - Shank Holder - Produced According to ISO 26623-1 Negative Insert Type TOOLING SELECTION General Turning & Application General Turning & Copying General Turning Facing External Holders Insert Type 80° Diamond Type 55° Diamond Type T-REX 90° Square Type System SCLC SDJC 55° SSBC Screw Lock System S Type Mini Holder SCLC SDJC SSBC a D43 SDHC a D43 a D43 SRSCR SDHC DCLN DDJN a D43 Double Lock (D) DCLN DDJN DDHN DSBN D Type a D41 a D41 DDHN DSBN a D41 a D41 Classification System for Polygon - Shank Holder PSC 4 0 - S C L C R 27 050 - 09 Polygon Clamping Holder Feed Direction Holder Insert Cutting Size (ØD) System R: Right Hand Size (f) Shank Style Length (L1) Edge Length D: Double Clamp L: Left Hand S: Screw Clamp N: Neutral Insert Seat Clearance Shape Angle N = 0° C = 7° P = 11° D6