Manufacturer Part Number: HP421-2500-BN|Mill Diameter (Inch)|1/4inMill Diameter (Decimal Inch)|0.2500inMill Diameter (mm)|Number Of Flutes|2End Mill Material|Solid CarbideEnd Type|Length of Cut (Inch)|3/4inLength of Cut (mm)|Coating/Finish|TiAlNOverall Length (Inch)|2-1/2inShank Diameter (Inch)|1/4inExtended Reach|NoVariable Helix|NoVariable Index|NoHelix Angle|35Overall Length (Decimal Inch)|2.5000inOverall Length (mm)|Chipbreaker|NoUndercutting|NoLength Of Cut Range (Decimal Inch)|0.7000 to 1.0000Length Type|StandardHelix Style|MediumMaterial Removal Type|Roughing & FinishingShank Diameter (Decimal Inch)|0.2500Shank Diameter (mm)|Neck Diameter (Decimal Inch)|Neck Diameter (mm)|Nose Radius (mm)|Nose Radius (Decimal Inch)|0.1250Neck Length (Inch)|Neck Length (Decimal Inch)|0.0000Neck Length (mm)|Reach Length (Inch)|Reach Length (mm)|Reach Length (Decimal Inch)|0.7500Mill Diameter Tolerance|+0.0000/-0.0015 inShank Diameter Tolerance|h6Overall Length Tolerance|Maximum Helix Angle|35Minimum Helix Angle|35Primary Workpiece Material|Primary Workpiece Material Code|Secondary Workpiece Material|Steel; Stainless Steel; Cast Iron; Superalloys & Titanium; Hard MaterialSecondary Workpiece Material Code|P; M; K; S; HMaterial Grade|SubmicronFlute Direction|Right HandCutting Direction|Right HandSeries|HP421BNFlute Type|HelicalTIR Maximum (Decimal Inch)|UNSPSC Code|27112803TIR Maximum (mm)|Product Service Code|Additional Information|The Hy-Pro-Carb Is An Entire Line Up Of Performance End Mills Designed For Extend Tool Life.Centercutting|YesCoating Classification|PVDCorner Radius (Decimal Inch)|Single Or Double End|SingleShank Type|Straight-CylindricalModel Number|Pitch|CoarseCoolant Through|NoLength Of Cut (Decimal Inch - 4 Decimals)|0.7500inManufacturers Catalog Number|HP421-2500-BNSystem Of Measurement|Fractional Inch