Spiral Fluted Taps (for blind hole)Spiral Fluted Taps(for through hole)Spiral Pointed Taps(for through hole)Hand TapsCementedCarbide TapsRoll TapsSpecial Thread TapsSimple Inspection ToolsPipe TapsThread MillsPremium Thread MillsDiesCenter DrillsCentering Tools ⑪ Center Drills / Centering Tools Drill Shank Overall Drilldia.dia.lengthlengthDcDsLℓ JIS ① AUCES AUCDS Coated Type A 60°High Helix Single End Center Hole Drill Coated Type A 60°Low Helix Single End Center Hole Drill ② Specification Specification Coating Coating ③ Product Features ●To improve the tools precision and accuracy, YAMAWA adopted a single end design. 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 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 ⑥ For higher speeds drill. 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 ⑦ Smaller flexibility in the The minimumprojected length portiongripped portion The extended shank gives more The minimumprojected length flexibility.gripped portion ⑧ Cutting Data Coated Single-End Coated DoubleTool TypeCenter Hole DrillEnded Center HoleMachining ConditionsSingle End Center Double End CenterHole Drill AUCEShole drill CE-SV AUCES Drill CE-SV Workpiece Size φ3×60°×8 Material:S50C ⑨ Workpiece Material & Hardness S50C(96 ~ 98HRB) Cutting Speed10m/minFeed 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 Large Diameter φ6 Feed Rate::0.12mm/rev Machinery Type Vertical machining center 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 ⑪ Workpiece MaterialCutting Speed S50C30m/min Feed Per Rev. 0.04mm/rev Large Diameter φ3 JIS ⑪-37