⑪ Center Drills / Centering Tools Drill dia. Dc Shank dia. Ds Overall length L Drill length ℓ JIS AUCES AUCDS Spiral Fluted Taps (for blind hole) ① Coated Type A 60°High Helix Single End Center Hole Drill Coated Type A 60°Low Helix Single End Center Hole Drill Spiral Fluted Taps (for through hole) ② Specification Specification Coating Coating Spiral Pointed Taps (for through hole) ③ Product Features ●To improve the tools precision and accuracy, YAMAWA adopted a single end design. Hand Taps ④ ●Higher quality center holes can be achieved with the AUCES and AUSDS coated, single end design center hole drill. ●Because of the single end design, the tool length in the holder is constant and the tool projection is constant. Compared with a double end center hole drill, the accuracy of Cemented Carbide Taps ⑤ the drill part and shank accuracy are improved with a single end center hole drill. The position of the tool identification markings is made at the back of the shank part to avoid clamping at the marking position of the Roll Taps drill. ⑥ For higher speeds and higher feeds The drill length (ℓ) is shorter than the conventional double end product. Higher speed, higher feed machining is possible. Conventional item Double-ended type Single-ended type Special Thread Taps Simple Inspection Tools ⑦ Smaller flexibility in the The minimum The extended shank gives more The minimum projected length portion gripped portion projected length flexibility. gripped portion Pipe Taps ⑧ Cutting Data Coated Single-End Coated Double Single End Center Double End Center Machining Conditions Hole Drill AUCES hole drill CE-SV Tool Type Center Hole Drill Ended Center Hole AUCES Drill CE-SV Workpiece Material:S50C Thread Mills Premium Thread Mills Size φ3×60° ×8 Cutting Speed10m/min ⑨ Workpiece Material & Hardness S50C(96 ~ 98HRB) Feed Rate: 0.05mm/rev Cutting Speed 10m/min, 30m/min Material S50C Feed Per Rev. 0.05mm/rev, 0.12mm/rev Cutting Speed 30m/min Feed Rate::0.12mm/rev Large Diameter φ6 Machinery Type Vertical machining center Dies ⑩ Cutting Fluid Water soluble cutting fluid(20 to 1 dilution) Coated Single End Coated Double End Center Hole Drill AUCES Center Hole Drill CE-SV Coated Single-End Coated Double Tool Type Center Hole Drill Ended Center Hole AUCES Drill CE-SV Size φ1×60° ×4 Center Drills Centering Tools Workpiece Material S50C ⑪ Cutting Speed 30m/min Feed Per Rev. 0.04mm/rev Large Diameter φ3 JIS ⑪-37