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