BB Tool
Micro Carbide Drill for Aluminum | 3×D | Ø0.3–3.99mm | 4mm Shank
Micro Carbide Drill for Aluminum | 3×D | Ø0.3–3.99mm | 4mm Shank
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BF2055 Micro Carbide Drill for Aluminum & Copper
Designed for precision CNC drilling of aluminum and copper. The BF2055 solid carbide micro drill combines a 3×D drilling design, 4mm shank and external coolant machining for stable small-diameter hole making from Ø0.3 to Ø3.99mm.
| Name: BB Micro Drill Material: Micro-grained carbide | |||||
| Number of flutes: 2 Series: BF2055 | |||||
| Shank diameter: 4mm Application: Aluminum & Copper | |||||
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Cutting diameter |
Shank diameter (D) |
Cutting length (L) |
Total length (OL) |
Angle | Tolerance |
| 0.3~0.4 | 4 | 4 | 50 | 118° | -0.005 |
| 0.41~0.5 | 4 | 5 | 50 | 118° | -0.005 |
| 0.51~0.99 | 4 | 6 | 50 | 118° | -0.005 |
| 1.0~1.5 | 4 | 8 | 50 | 118° | -0.005 |
| 1.51~2.0 | 4 | 10 | 50 | 118° | -0.005 |
| 1.5 | 4 | 12 | 50 | 118° | -0.005 |
| 2.01~2.5 | 4 | 12 | 50 | 118° | -0.005 |
| 2.51 | 4 | 12 | 50 | 118° | -0.005 |
| 2.5~3.0 | 4 | 15 | 50 | 118° | -0.005 |
| 3.01~3.5 | 4 | 18 | 50 | 118° | -0.005 |
| 3.51~3.99 | 4 | 20 | 50 | 118° | -0.005 |
BF2055 Micro Drill — Solid Carbide Precision Tool
· Solid Carbide Construction: The entire drill bit is crafted from solid carbide, delivering high wear resistance and durability for precision CNC drilling.
· Important Handling Notice: Due to the inherent rigidity of solid carbide, the bit is less tolerant to lateral stress and vibration. Do not use with hand-held electric drills or unstable machining setups.
BF2055 微型硬质合金钻头
· 整体硬质合金结构：钻头整体采用硬质合金制成，适用于精密 CNC 钻削。
· 重要操作须知：硬质合金对侧向应力和振动较敏感，请勿用于手电钻或不稳定的加工环境，以降低断刀风险。
Precision Edge Grinding & Polishing Process
The edge polishing process enhances both cutting-edge sharpness and surface finish, supporting clean, consistent hole quality in precision drilling.
刃口研磨抛光工艺
刃口抛光有助于提升切削刃锋利度和表面光洁度，为精密钻孔提供更稳定、整洁的孔加工质量。
Ultra-Fine Grain Carbide
Built with an ultra-fine grain carbide substrate for the rigidity and wear resistance required in small-diameter CNC drilling.
超细晶粒硬质合金
采用超细晶粒硬质合金基体，为小直径 CNC 钻削提供所需的刚性与耐磨性。
Large Core Diameter Design
The large-core geometry supports tool rigidity and drilling stability, helping reduce breakage risk in small-diameter machining.
大芯径设计
大芯径结构有助于提高刀具刚性和钻削稳定性，降低小直径加工中的断刀风险。
Passivation & Precision Grinding
Precision grinding and edge treatment help create a clean cutting edge for smoother drilling and consistent tool performance.
钝化与精密研磨
精密研磨与刃口处理有助于形成整洁的切削刃，使钻削更加顺畅，并保持稳定的刀具性能。
Spiral Flute Design for Chip Evacuation
Precision-finished spiral flutes support smooth chip evacuation when drilling aluminum and copper, helping maintain a clean cutting zone.
螺旋槽排屑设计
精密处理的螺旋槽有助于铝和铜钻削时顺畅排屑，并保持切削区域清洁。
4mm Round Shank for Stable Clamping
The 4mm round shank provides stable clamping in compatible precision CNC tool holders and machining setups.
4mm 圆柄稳定夹持
4mm 圆柄适用于兼容的精密 CNC 刀柄和加工设备，有助于保持稳定夹持。
Precision Micro-Hole Drilling
Suitable for precision small-diameter hole making in aluminum and copper on CNC milling machines, machining centers and CNC engraving machines.
精密微孔钻削
适用于 CNC 铣床、加工中心和 CNC 雕刻机上的铝、铜小直径精密孔加工。
Recommended materials: Aluminum, copper and similar non-ferrous materials.
Compatible equipment: CNC milling machines, machining centers and CNC engraving machines.
Cooling: External coolant.
Drilling depth: Designed for applications up to approximately 3×D.
Recommended Cutting Conditions
*Reference parameters are general starting points and should be adjusted for the workpiece, machine rigidity, tool overhang and cooling conditions.
*If abnormal noise or vibration occurs, stop machining and adjust the cutting parameters.
*If the machine cannot reach the recommended spindle speed, use the highest stable speed available and adjust feed proportionally.
*Provide sufficient external coolant to the drilling zone and cutting edge.
*The reference parameters are intended for drilling depths up to approximately 3×Dc.
*For small diameters and deeper holes, use appropriate peck drilling according to diameter, depth and chip evacuation conditions.
*Keep drill runout below 0.02mm where possible.
About BB Tool
BB Tool develops and supplies carbide cutting tools for CNC machining. For micro-drilling applications, select the drill diameter, machining material, drilling depth and cooling method according to your machining requirements.
