ISO Insert Internal To o l h o l d e r - Quick Guide Negative type Lever lock Min. bore diameter DMIN (mm) Style Designation & Application Material Page203040506070 PTUNR/LBoring Steel ø20 ø40 D061 - Insert : TN Reinforced ø20 ø63 D063 PTFNR/L Boring Steel ø32Insert : TN ø63 D045D046 PSKNR/L Through boringInsert : SN Steel ø40 ø63 D040 PDUNR/LBoring & internal profiling Steel ø25 ø63 D054 - Insert : DN Reinforced ø40 ø63 D057 PCLNR/L Steel ø20 ø63 D021 Boring & internal facingInsert : CN Reinforced ø20 ø63 D023-D025 PWLNR/LBoring & internal facing D029Steelø20ø50D031 Insert : WN D032 PVUNR/L 50˚ Boring & internal profiling SteelInsert : V/YN ø37 ø50 D072D073 PDZNR/L Back boring Steel ø40 ø63 D087 Insert : DN D010 www.tungaloy.com