Micro End Mill

Overview and Advantages

Micro end mills are engineered for precision work in tight spaces and difficult materials. They hold tight tolerances and deliver mirror-like finishes on miniature features.

Each solid carbide tool is ground on TTB, WALTER, DECKEL, and ANCA equipment. Verification on ZOLLER and PARLEC video systems ensures sub-micron accuracy and consistent batch performance. Production in Changzhou, Jiangsu operates under ISO9001 controls for reliable tool life.

Tool Types and Key Uses

• Square End: Sharp edge integrity for slots, pockets, and steps. Controlled rake and refined edge prep deliver clean walls and tight corners in medical, electronics, mold and die, and precision instrument parts.


• Ball Nose: For freeform surfaces and 3D micro-contours. Small stepovers produce superior finishes. Extended neck options reach deep features without chatter, ideal for micro molds, microfluidic channels, and watch components.


• Corner Radius and Long-Reach: A small radius strengthens the edge in tougher alloys. Long-reach and relieved-neck designs maintain rigidity in deep cavities, reduce burrs, and protect delicate features.

Material-Focused Geometry

• Aluminum and non-ferrous: High helix, polished flutes, and DLC/ZrN coatings evacuate chips and resist built-up edge for bright finishes at high feed.


• Stainless and tool steels: Reinforced edges, variable helix, and AlTiN/TiAlN coatings lower cutting forces, stabilize heat, and hold consistent tolerances.


• Titanium and superalloys: TiSiN/AlTiN coatings with balanced rake and controlled edge prep limit notch wear and preserve surface integrity at lower SFM.


• Graphite and composites: Chip-resistant flute forms and wear-resistant coatings manage dust and reduce edge rounding for accurate, fine features.

Geometry and Cutting Design

• Flute count and helix: Two flutes maximize chip space in gummy materials. Three to four flutes improve stability and finish in steels. High helix promotes evacuation, while precise micro edge prep balances sharpness and strength.


• Vibration control: Variable helix and pitch break harmonic chatter at small scale, protecting tool life and feature accuracy.


• Heat and chip removal: Tools support air, oil-mist, or coolant. Coolant-through is offered where diameter allows. Polished flutes and chip splitters improve evacuation and reduce welding.

Sizes, Tolerances, and Quality

• Size range: Diameters from Ø0.05–3.0 mm (decimal sizes available). Stub to long-reach lengths, relieved necks, and 3 mm or 1/8\" shanks support stable clamping. Extended neck clearance opens access to deep pockets.


• Tolerances and runout: Diameter tolerance down to ±3 μm with controlled concentricity. Runout ≤2 μm is achievable with high-precision collet chucks.


• Inspection and presetting: Edge geometry, diameter, and length offsets are verified, enabling plug-and-play presetting and consistent results across machines and shifts.

Coating Options

• Non-ferrous: Uncoated, DLC, and ZrN preserve razor edges and prevent built-up edge in aluminum and copper. Polished flutes and low-friction surfaces support high RPM and feed without smearing.


• Steels and high-temperature alloys: AlTiN, TiAlN, and TiSiN increase hot hardness and oxidation resistance, keeping micro edges sharp under thermal load.

Custom Tools

When standard options don’t fit the feature or material, tailor-made cutters optimize flute form, edge prep, neck relief, and coatings to your process goals. Provide part drawings and critical features, material and hardness, target surface finish and cycle time, machine model and spindle capability, coolant delivery, toolholder and maximum projection, plus diameter tolerance and surface Ra targets.

Cutting Data Guidelines

• Aluminum: 150–365 m/min and 0.002–0.010 mm/tooth. Use high RPM, air/oil mist, and polished flutes; adjust stepovers to protect edge life.


• Stainless/tool steel: 25–60 m/min and 0.001–0.006 mm/tooth with coated tools and variable helix. Prioritize rigid toolholding and minimal runout.


• Titanium/nickel alloys: 12–36 m/min and 0.0008–0.004 mm/tooth. Apply heat-resistant coatings, small radial engagements, and reliable coolant or mist.

Toolholding and Machine Compatibility

Pair these cutters with high-precision collet chucks to achieve ≤2 μm runout and maximize edge life. Multi-axis CNC centers with high-speed spindles, robust frames, and thermal stability provide the best results. Control projection to minimize vibration.

Proof and Selection

Sub-micron edge prep and thermally stable grinding support longer runs, fewer tool changes, and fine surface finishes at miniature scale. To choose the right tool, match flute count to material, select helix for chip flow, and pick coatings for heat and abrasion. Confirm diameter tolerance, neck relief, and shank size fit your feature geometry and toolholder. Contact us to discuss your part features or request a quote for micro machining solutions.