High Polish Long Neck Micro Ball Nose End Mill for Aluminum | China Factory

🎯 Precision Deep Reach Solutions for Non-Ferrous Machining

As a leading carbide end mill factory in China, we specialize in long neck micro ball nose tools designed for high-precision aluminum machining. This series is specifically engineered to solve the two most critical challenges in micro-milling: chip adhesion (BUE) and tool deflection in deep cavities.

Whether you are machining deep ribs, complex 3D molds, or electronic housings, our mirror-polished rib cutters ensure a burr-free finish and extended tool life.

💎 Key Features & Technical Advantages

Mirror-Polished Flutes: The ultra-smooth, mirror-like surface finish minimizes friction and prevents "Built-Up Edge" (BUE), where aluminum melts onto the tool.

Deep Reach (Rib Cutter) Design: The relieved neck diameter (D2 < D1) allows for machining deep pockets and thin ribs without the shank contacting the workpiece.

Micro-Grain Carbide: Built on an HRC55/HRC60 tungsten carbide substrate for maximum rigidity and wear resistance in high-speed spindles.

Optimized 2-Flute Geometry: Large U-shaped chip gullets are designed to throw chips up and out of deep cavities rapidly.

Precision Shank: Standard h6 tolerance 4mm shank maximizes rigidity and minimizes runout (T.I.R).

📊 Technical Specifications (Micro Series)

Select the matching Ball Radius (R) and Effective Length (L2) for your specific depth requirements.

Ball Radius (R)	Cutter Dia (D1)	Length of Cut	Available Effective Lengths (L2)	Overall Length (L)
R0.15	0.3 mm	0.6 mm	1.0, 1.5, 2.0, 2.5, 3.0, 4.0 mm	50 mm
R0.20	0.4 mm	0.8 mm	1.5, 2.0, 3.0, 4.0, 5.0, 6.0 mm	50 mm
R0.25	0.5 mm	1.0 mm	1.5, 2.0, 3.0, 4.0, 5.0, 6.0, 8.0 mm	50 mm
R0.30	0.6 mm	1.2 mm	2, 3, 4, 5, 6, 8, 10, 12 mm	50 mm
R0.50	1.0 mm	2.0 mm	3, 4, 5, 6, 8, 10, 12, 14, 16, 20, 25, 30 mm	50 mm
R0.75	1.5 mm	3.0 mm	4, 6, 8, 10, 12, 15, 18, 20, 25, 30 mm	50 mm
R1.00	2.0 mm	4.0 mm	6, 8, 10, 12, 14, 16, 20, 25, 30 mm	50 mm
R1.50	3.0 mm	6.0 mm	8, 10, 12, 16, 20, 25, 30 mm	50 mm

💡 Pro Tip: For deep rib processing, always select the shortest effective length (L2) possible to maximize tool rigidity and prevent breakage.

Deep Cavity Machining: Engineering Stability for Long-Reach Micro Milling

In precision mold making and electronic component manufacturing, deep cavity machiningpresents a unique set of challenges—primarily tool deflection and harmonic vibration. As the Length-to-Diameter (L/D) ratioincreases, the risk of "chatter" grows exponentially, which can lead to poor surface finish or premature tool failure.

Our Long Neck Micro Ball Nose seriesis specifically engineered to counteract these forces. By utilizing a relieved neck design (D2 < D1), we ensure that the shank never contacts the sidewalls of deep ribs or narrow pockets. This geometry allows for a more rigid core compared to full-flute tools of the same length, significantly reducing the bending moment during high-speed lateral passes.

Key Stability Factors for Deep Reach Operations:

Vibration Dampening:The transition from the cutting edge to the relieved neck is precision-ground to absorb micro-vibrations. This ensures a stable "bite" into the aluminum substrate even at 40,000+ RPM, preventing the micro-chipping common in inferior tools.

Chip Evacuation in Deep Pockets:In deep cavities, chip re-cutting is a major cause of tool breakage. Our mirror-polished U-shaped gulletsact as a high-speed conveyor, forcing aluminum chips upward and out of the cavity before they can weld to the tool surface.

L/D Ratio Management:For applications where the effective length (L2) exceeds 10x the diameter, maintaining a T.I.R (Total Indicator Runout) of less than 0.003mmis critical. Our factory-calibrated h6 shanks ensure that even at maximum reach, your dimensional accuracy remains within microns.

By sourcing directly from our China factory, you gain access to micro-tools that balance the delicate trade-off between reach and rigidity, ensuring that your deep-reach aluminum milling remains consistent, burr-free, and highly efficient.

📈 Recommended Cutting Parameters (Micro Ball Nose)

Note: Micro tools require high RPM. Adjust based on your spindle capability and setup stability.

Ball Radius (R)	Spindle Speed (RPM)	Feed Rate (mm/min)	Depth of Cut (ap)	Width of Cut (ae)
R0.2 - R0.3	35,000 - 45,000	400 - 800	0.02 mm	0.04 mm
R0.5	25,000 - 35,000	800 - 1,200	0.05 mm	0.10 mm
R1.0	18,000 - 25,000	1,200 - 2,000	0.10 mm	0.20 mm
R1.5	15,000 - 20,000	1,500 - 2,500	0.15 mm	0.30 mm

Coolant: Misting or flood coolant is essential for aluminum to prevent chip welding.

Long Reach Adjustment: If L2/D1 ratio > 10, reduce Feed Rate by 30-50%.

🏭 Why Source from QT Tools Factory?

Specialized for Aluminum: Unlike multi-purpose tools, our geometry is 100% optimized for non-ferrous metals (Alu 6061/7075, Copper, Brass).

Consistent Quality: Every micro tool is inspected under high-magnification cameras to ensure perfect radius symmetry.

B2B Support:

Free Samples: Available for qualified industrial clients (shipping excluded).

Bulk Discounts: 2-5% off for orders over USD $5,000.

Fast Global Shipping: Large stock of standard micro sizes ready for immediate dispatch.

❓ FAQ: Micro Long Neck Milling

Q1: Why use a long neck instead of a long flute? A: A long neck provides much higher rigidity. A long flute would have too much surface contact, leading to friction, heat, and tool deflection. The relieved neck ensures only the ball end is cutting.

Q2: Can I use these for Copper or Brass? A: Yes. The high-polish finish and sharp edge prep are excellent for all non-ferrous materials and even some plastics (Acrylic/Polycarbonate).

Q3: Do you offer DLC coating for micro tools? A: Yes. For high-silicon aluminum or continuous production, we can apply DLC (Diamond-Like Carbon) coating to further extend tool life and reduce friction.

Q4: What is the lead time for custom neck lengths? A: Custom micro tools typically have a lead time of 7-10 working days.

High Polish Long Neck Micro Ball Nose End Mill | China Factory