10-Pack Tungsten Carbide PCB Micro Drill Bits | CNC 3.175mm
10-Pack Tungsten Carbide PCB Micro Drill Bits | CNC 3.175mm
10-Pack Micro PCB Drill Bits – Tungsten Carbide, 3.175mm Shank
Take your circuit board projects to the next level with this precision-engineered 10-piece PCB drill bit set. Crafted from solid tungsten carbide, these micro drill bits are designed for clean, accurate holes in printed circuit boards, composite materials, and more — making them an essential addition to any electronics workbench or CNC setup.
Why Choose These PCB Drill Bits?
- Precision Machined: Manufactured using high-accuracy equipment for consistent sizing and reliable performance across every bit in the set.
- Superior Cutting Performance: Excellent milling and cutting efficiency means faster drilling with less effort and reduced bit breakage.
- Tungsten Carbide Construction: Exceptional hardness, wear resistance, and strength with outstanding anti-bending properties for longer service life.
- Efficient Chip Removal: Wide chip-clearance flutes reduce heat buildup and minimize debris, keeping your work clean and your holes smooth.
- Sharp Cutting Edge: Reduces cutting force for a lower breakage rate and noticeably improved hole-wall quality — no more ragged edges.
- Symmetrical Blade Design: Ensures balanced, offset-free drilling so your holes land exactly where you need them every time.
Specifications
| Material | Tungsten Carbide |
| Shank Diameter | 3.175 mm (1/8") |
| Overall Length | 38 mm |
| Quantity | 10 pcs (multi-specification set) |
| Country of Origin | Made in China |
Compatible Materials & Applications
These micro drill bits are suitable for a wide range of materials, including:
- Standard FR-4 and CEM-3 PCB boards
- Environmental protection boards
- SMT and CNC machining applications
- Plastic, carbon fiber, and composite boards
- Molds and general hobby electronics work
What's in the Box
- 10 × Tungsten Carbide PCB Micro Drill Bits (multi-specification)
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Frequently Asked Questions
Q: What shank size are these PCB drill bits, and will they fit my CNC machine or rotary tool?
A: Each drill bit features a standard 3.175 mm (1/8") shank diameter, which is widely compatible with most desktop CNC routers, PCB drilling machines, and rotary tools that accept 1/8" collets or chucks.
Q: What types of circuit boards can these micro drill bits be used on?
A: These tungsten carbide micro drill bits are designed for use on standard FR-4 and CEM-3 PCB materials, environmental protection boards, composite boards, carbon fiber panels, plastics, and molds — making them highly versatile for electronics hobbyists and professionals alike.
Q: How many drill bits are included and are they different sizes?
A: The set includes 10 pieces in multiple specifications (sizes), giving you a range of diameters to cover various PCB hole requirements in a single convenient package.
Q: How do I minimize breakage when using these micro drill bits?
A: Use a consistent, moderate feed rate and keep your spindle speed within the recommended range for carbide bits on PCB material. The symmetrical blade design and sharp cutting edge on these bits naturally reduce cutting force and breakage risk — just avoid excessive lateral pressure during drilling.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.