0.51mm Dia.Solid Carbide Flat Bottom Drill Counterbores Cutter Thin Plate Crosshole Irregular Rounded Bore Milling Angled Drilling Remove End Mills for Aluminum Copper Cast Iron

1.Bore and finish drilled holes. Featuring slow helix and low rake, their geometry ensures stable cutting, good chip evacuation and superior surface finish for secondary finishing work. 2.Straighten misaligned drilled holes, correcting imperfect holes caused during machining. 3.perform spot facing and counterboring on irregular surfaces. Unlike standard drills prone to wandering, their special geometry prevents tool walking. 4.They eliminate unwanted bottom profiles in holes: removing the conical drill point left by standard drills and clearing the concave dish formed when plunging with regular end mills to achieve flat hole bottoms.

• No dish flat-bottom structure: supports spot facing, counterboring, flat-bottom reaming, and fixing misaligned holes. handles tilted drilling for angled holes, alongside work on intersecting holes, half holes, shoulders and thin plates. works well for secondary finishing on uneven surfaces including cast components, rounded profiles, concave forms and drafted parts, and can correct hole position errors left by earlier machining steps
• Special Geometry for Stable and Efficient Cutting: Slow helix and low rake angle geometry for stable cutting, chip evacuation, surface finish. Flute design prevents tool walking. Eliminates conical drill point from standard drills. Removes concave dish from regular end mills. Achieves flat hole bottoms
• Specifications: Solid carbide. CNC-ground. Nano-coating.Four-margin land design improves hole straightness and roundness,cutter tolerance: < -0.005" (-0.0002 inch).For counterboring,high-speed drilling,spotting, holemaking,thread plunging,CNC metalworking
• Material Compatibility & Applications: For hardened steel, free-machining steel, medium alloy steel, carbon steel, alloy steel, cast iron, tool steel, chrome-nickel-iron alloys. Flat bottom drills offer precision and efficiency in holemaking.creating flat-bottom holes with accuracy and consistency
• Drill Size:0.5mm Drill Dia-4mm Flute-3mm SHK-50mm OAL (0.019 Drill Dia-0.157 Max.Dp.-0.118 Shank Dia.-1.96 OAL inch)