Advice on one point ¢ Chip control improvement at external machining ・Chip Control Oriented 5 Steel 5 Stainless Steel 1) Choose a chipbreaker applicable for varying ap 4 4 l Applicable to high precision cutting, sharp cutting due to (mm) 3 GQ (mm) 3 ap ap GQ periphery ground edge 2 2 1 GF 1 GF l Superior surface finish due to anti-adhesion polished edge CF CF 0.05 0.1 0.15 0.2 0.05 0.1 0.15 0.2 f (mm/rev) f (mm/rev) ・Low Cutting Force 5 Steel 5 Stainless Steel 4 CK 4 CK General purpose ap (mm) General purpose ap (mm) E 3 3 2 2 SK Finishing 1 1 SK Finishing 0.05 0.1 0.15 0.2 0.05 0.1 0.15 0.2 f (mm/rev) f (mm/rev) Small Tools 2) Improve chip control dividing tool passes into 2; roughing and finishing l When chip control is not good in 1 pass machining _Use Goose-neck Holders or Sleeve Holders Countermeasures (1) Finishing by Goose-neck Holder Roughing and finishing at one time by conventional toolholder Bad chip control After roughing Countermeasures (2) Finishing: Move Sleeve Holder forward ¢ How to choose toolholders to improve productivity in external turning Applications Tooling Example Toolholder Advantages Workpiece Dia. Medium-roughing of steel (Radial ap: mm) SCLN-FF Small Double Sided Tooling SDLN-FF (Screw Clamp) Cost reduction Over φ6 ap=~2.5mm Medium- STLN-FF Roughing PCLN-FF Toolholder for Double Sided Tooling PTLN-FF for Automatic Lathe (Lever Lock) Cost reduction Over φ16 ap=1.5~5mm +FP-TK Chipbreaker Small Double Sided Tooling Cost reduction Under φ16 ap=~2.5mm Ref. to Page E9 (Screw Clamp) Fig.1 Goose-neck Holder Chip Control - - (External Sleeve Holder) Toolholder for Double Sided Tooling Ref. to Page E9 for Automatic Lathe (Lever Lock) Cost reduction φ16~φ32 ap=1.5~5mm Medium-Roughing +FP-TK Chipbreaker + Fig.2 Goose-neck Holder Finishing (External Sleeve Holder) Chip Control - - Long curled chips are Ref. to Page E9 Grooving Toolholder evacuated toward a φ16~φ32 ap=over 4mm Fig.3 fixed direction Goose-neck Holder Chip Control - - (External Sleeve Holder) E8