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BB2055 PRO Spiral Flute Solid Carbide Reamer with Internal Coolant
Precision carbide reamer for CNC hole finishing from 4 to 12 mm. This PRO series combines spiral-flute geometry with internal coolant delivery to support chip evacuation, temperature control and stable finishing in demanding reaming applications.
Key Features
Internal coolant: coolant is delivered through the tool toward the cutting zone to support heat control and chip evacuation.
Spiral flute geometry: supports progressive cutting and smoother chip movement during reaming.
Solid carbide construction: provides rigidity and wear resistance for precision finishing.
4T / 6T configurations: flute count varies by diameter according to the listed variant.
Metric size range: available from 4 to 12 mm.
Typical Applications
Precision CNC reaming of pre-drilled or pre-bored holes
Production machining where through-tool coolant is available
Hole-finishing operations requiring improved coolant access to the cutting zone
Applications where stable surface finish and dimensional repeatability are important
How to Read the Size
Variants use formats such as 4×D6×12×75-4T or 6.1×D8×16×100-6T. The first value is the nominal reamer diameter, followed by the listed shank and length dimensions and flute count.
Machining Notes
Confirm internal coolant flow before machining. Maintain a consistent pre-hole allowance, use rigid low-runout toolholding and select cutting parameters according to workpiece material, machine rigidity and target tolerance. Avoid excessive stock removal during reaming.
Need help selecting a PRO reamer? Send BB Tool your finished-hole diameter, tolerance, material, pre-hole size and coolant capability for guidance.
