PCB Micro Drill Bit Set – 10pc Tungsten Carbide CNC Bits

PCB Micro Drill Bit Set – 10-Piece Tungsten Carbide CNC Drilling Bits

Take your electronics and circuit board projects to the next level with this precision-engineered set of 10 PCB micro drill bits. Crafted from premium tungsten carbide with a 3.175mm (1/8") shank, these mini CNC drilling bits are designed for clean, accurate holes in PCB boards, FR-4, CEM-3, carbon fiber, composite boards, and more. Whether you're a hobbyist or a professional maker, these bits deliver consistent performance and long-lasting durability.

Made in Mainland China.

Key Features

• Precision Machined: Manufactured using high-accuracy equipment for tight tolerances and repeatable results.
• High-Performance Cutting: Excellent milling and cutting performance ensures efficient, fast drilling with minimal effort.
• Tungsten Carbide Construction: Exceptional hardness, wear resistance, and strength — these bits resist bending and stay sharp longer.
• Optimized Chip Removal: Wide flute design provides large chip clearance with minimal resistance, reducing heat build-up and keeping your workpiece clean.
• Sharp Cutting Edge: Reduces cutting force, lowers bit breakage rates, and delivers smooth, clean hole walls.
• Symmetrical Blade Design: Ensures balanced, accurate drilling and helps eliminate bit drift or offset.

Specifications

Compatible Materials

These drill bits are suitable for a wide range of materials and applications, including:

• PCB (Printed Circuit Boards)
• Standard FR-4 and CEM-3 Boards
• SMT (Surface Mount Technology) Boards
• Environmental Protection Boards
• Carbon Fiber & Composite Boards
• Plastics & Molds
• CNC Machining Applications

What's in the Box

• 10 × PCB Micro Drill Bits (3.175mm Shank, 38mm OAL, Tungsten Carbide)

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For guidance on safe tool use and electrical safety standards, visit the OSHA Electrical Safety Resource.

Frequently Asked Questions

Q: What shank size do these PCB drill bits have?

A: Each drill bit features a 3.175mm (1/8") shank diameter, which is compatible with most standard CNC routers, rotary tools, and micro-drilling machines used for PCB work.

Q: What materials can I drill with these tungsten carbide PCB bits?

A: These bits are ideal for drilling PCB boards, FR-4, CEM-3, environmental protection boards, carbon fiber, composite boards, plastics, and molds. They are not recommended for drilling metal.

Q: How many bits come in the set?

A: The set includes 10 individual PCB micro drill bits, all with the same 3.175mm shank and 38mm overall length. Multiple size options may be available — check the listing variants for available diameters.

Q: Are these bits suitable for CNC machines?

A: Yes! These bits are specifically designed for use with CNC drilling machines, rotary tools, and mini drills, making them a great choice for both hobbyist and professional PCB fabrication setups.