Micro Carbide Drills

Ultra High Precision Solid Carbide Micro Drill Bits

Diameter range: 0.03 mm – 3.0 mm
Diameter control: up to ±0.003 mm
Designed for: electronics, medical, automotive, semiconductor, and precision mold industries

Nano‑grain solid carbide substrate
Optimized micro‑drilling geometry
Advanced PVD coating options
Longer tool life and higher process reliability

Micro Carbide Drills/Small Diameter Drills

MSU offers a family of small diameter carbide micro drill for precision drilling in medical, aerospace and the automotive industry. The Exclusive Line of high precision carbide drills are available in solid designs from 0.003 mm to 3.0 mm diameter.

Ultra-Tight Tolerance: Diameter tolerance is strictly controlled between 0 to -0.003mm, ensuring superior consistency for every hole drilled.
120-Grade Ultra-Fine Carbide: Manufactured using 120-grade ultra-fine micro-grain raw materials, balancing extreme hardness with exceptional fracture resistance.
Comprehensive Specifications: A wide diameter range from Φ0.03mm to Φ3.0mm to meet all application scenarios from micro-electronics to precision molds.
Optimized Geometry: Features a 35° helix angle and scientifically calculated flute-to-diameter ratios to ensure smooth chip removal and reduced cutting heat.

MSU Micro Drills Series & Specification

MSU326 Series — Universal High-Performance Micro Drills

Working Material:
Features: Standard 3.0mm shank diameter, 38mm total length; compatible with most precision machining centers.
Ultra-Fine Drilling: Supports micro-hole machining starting from 0.03mm, with flute lengths precisely matched to the diameter.

MSU426 / MSU426L Series — High-Performance & Deep-Hole Extended Series

Working Piece:
Deep-Hole Specialist: The MSU426L provides an extra-long flute specifically designed for deep-hole applications.
Angle Optimization: 118° point angle for D1≤0.5mm; 135° point angle for D1>0.5mm to enhance positioning accuracy.

Micro Drills Specification

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Electronics: Drilling holes in Printed Circuit Boards (PCBs).
Medical: Creating tiny components for surgical instruments and implants.
Automotive: Manufacturing small parts and intricate assemblies.
Aerospace & General Engineering: For producing miniature parts.

Why Choose MSU Carbide Micro Drills

A Profit Multiplier, Not Just a Tool

Reduce Total Cost: The 120-grade ultra-fine carbide extends tool life significantly, reducing downtime and tool replacement costs.
Boost Delivery Competitiveness: High first-pass yield rates (thanks to the 0.003mm tolerance) help you secure high-end orders in medical, aerospace, and electronics.

Extreme Accuracy, Zero “Breakage Anxiety”

Scientific Design: We provide optimized flute lengths based on the formula (Depth + Chip Flute + Penetration Depth) to prevent breakage caused by poor chip evacuation.
Versatile Performance: Maintain exceptional sharpness and positioning accuracy across materials ranging from stainless steel to hardened steel.

Supply Chain Certainty

One-Stop Sourcing: A complete range from Φ0.03mm to Φ3.0mm means you don’t need to manage multiple suppliers.
2026 Strategic Support: As a professional manufacturer, we offer stable stock and technical support to keep your production lines running.

More Product Phots

Msu Test Report

FAQ

Is it easy to break? How long does it last?

We use nano-grade substrates, which increase bending strength by 20%. As long as the parameters are matched, the lifespan is very stable, effectively reducing downtime.

Will deep holes get clogged with chips?

No. The chip removal groove is mirror-polished and extremely smooth, allowing chips to be discharged smoothly.

What is the run-out precision?

Strictly controlled within 0.003mm with this range, ensure precise hole diameter and avoid enlarging the hole.

Can it drill titanium alloys or stainless steel?

Yes. We have a specialized series of nano-coatings that are high-temperature resistant, wear-resistant, and specifically designed for difficult-to-process materials.

Do you have stock available? What is the delivery time?

Standard sizes are readily available and can be shipped on the same day; custom-made items can be delivered in as little as 7-10 days.

What if the quality is unstable?

Every single item has batch traceability. If there’s a quality issue, we respond within 24 hours and offer refund or replacement.

What range can you control for your cutting diameter and shank diameter tolerances? What is the runout?"

“Our micro drill bit diameter tolerance is strictly controlled within ±0.002mm , and the shank diameter tolerance is h6 standard. Regarding runout, each batch undergoes high-magnification optical inspection before leaving the factory to ensure that the runout is controlled within 0.005mm , minimizing the risk of drill breakage and ensuring the consistency of hole diameter.”

Surface Treatment and Coating (Coating & Surface Finish)

“We offer a variety of coatings, including TiAlN (TiAlN) and DLC (Diamond-like Carbon). To address chip removal challenges, our micro-drills feature mirror-polished chip evacuation grooves . This significantly reduces cutting resistance and prevents built-up edge (BUE) formation, making them particularly suitable for deep hole machining.”

What are the advantages of your prices compared to leading brands in the market (such as Mitsubishi and Union Tool)? What discounts are available for bulk purchases?

“While our unit price may be slightly higher than that of lower-end brands, by increasing tool life by 30% and reducing scrap rate by 0.5% , your ‘overall machining cost per hole’ is actually lower. For customers with high annual usage, we offer tiered pricing and annual rebate agreements.”

Micro Carbide Drills

Ultra High Precision Solid Carbide Micro Drill Bits