BB Left Hand 1-12mm H7 Carbide Spiral Flute PRO External Cooling Small BF2055

BB BF2055 — Left-Hand Carbide Reamer | Aluminum & Non-Metallic | H7 | 1–12mm Solid carbide spiral-flute reamer optimized for aluminum alloy, copper, plastics, and composites. Left-hand rotation with external coolant delivery ensures mirror-finish H7 bores with zero built-up edge. Left-Hand Rotation · Right-Hand Cut · Downward Chip Ejection Counter-rotation prevents self-tightening in the spindle. Chips are pushed downward and clear of the cutting zone — ideal for blind-hole finishing and back-boring in aluminum and composite parts. Polished Wide Flutes — No Clogging, No Smearing Mirror-polished chip gullets prevent aluminum from welding to the cutting edge. Low cutting resistance, stable finish, extended tool life across the full 1–12 mm range. Micro-Grain Carbide · Uncoated · Built for Non-Ferrous Premium WC-Co micro-grain substrate. Uncoated design eliminates coating adhesion issues on aluminum and plastics. Optimized for high-speed dry or MQL machining — sharp, consistent, and long-lasting. Full-Ground Edges · Edge Passivation · H7 Precision Every edge is precision-ground and passivated to a controlled micro-radius. Eliminates entry chipping, reduces cutting force, and delivers repeatable H7 bore quality in aluminum housings and plastic components. Reinforced Core · Anti-Deflection · Deep-Hole Stable Enlarged core diameter maximizes torsional rigidity. Maintains bore roundness and cylindricity in deep-hole aluminum and CFRP applications where tool deflection is critical. Cylindrical Shank (h6) · Universal Chuck Compatibility Fits ER collet, hydraulic, and shrink-fit holders. Ground to tight runout tolerances — ready for CNC machining centers, drilling and milling machines without additional setup. Applicable Materials ✔ Aluminum Alloy (6061, 7075, ADC12) ✔ Copper & Brass ✔ Plastic (ABS, PC, POM, PEEK) ✔ Fiberglass / GFRP ✔ Carbon Fiber / CFRP ✔ Wood & MDF ✔ Nylon & Engineering Plastics ✘ Not for steel, cast iron, or hardened materials Compatible Machines CNC Machining Center · Drilling Machine · Milling Machine · Automatic Machine Tool · Tapping Machine · Magnetic Drill