Best Circuit Board Drill Bits AI pick
Chosen by an AI model from its trained knowledge, with its reasoning.
AI pick (brand): Union Tool
Union Tool is a leading maker of carbide PCB drills built for the high spindle speeds and small diameters of board drilling.
Not for: People drilling with a handheld rotary tool at low speed, where these brittle carbide bits snap.
AI picks by need
For US-sourced PCB bits
Kyocera Tycom (line)
Tycom carbide bits are a long-standing standard for PCB drilling.
Not for: Drilling metal parts, since the geometry is optimized for laminate.
What the AI looks for in Circuit Board Drill Bits
- Shank
- 1/8" (3.175 mm) shank is the PCB standard It fits PCB drilling spindles and collets, and the uniform shank lets bits swap without re-collet.
- Material
- Solid tungsten carbide Fiberglass laminate quickly dulls HSS.
- Rigidity
- Use a drill press or CNC; never use these freehand Carbide micro bits break with any side load.
- Ring collar
- Set collars give a consistent depth across bits in CNC They allow tool changes without re-zeroing.
Brands that matter
- Union Tool: Major Japanese PCB drill maker.
- Kyocera: Tycom PCB drills.
What to avoid
- Freehand use in a rotary tool
- Unbranded bulk packs with inconsistent diameters
- Reground bits for critical via sizes