Choosing the right rotary tools for PCB drilling starts with matching bit diameter, shank size, and cutting material to the holes you need to make. The selections in this roundup cover ultra-fine bits, common PCB sizes, and multipiece sets for repeat work.
Whether you are drilling a prototype board, modifying an enclosure, or using a rotary tool for precision craft projects, the right bit can improve control and reduce breakage. Use the guide below to compare the most important specifications before buying.
Best 10 Rotary Tools for Pcb Drilling Picks for 2026
Best Size Variety
- Ten sizes from 0.3 mm to 1.2 mm
- Five bits per size for replacements
- Includes a protective plastic case
Best For: PCB drilling with varied micro-hole sizes
Best Range
- Covers 30 sizes from 0.1 mm to 3.0 mm
- Tungsten carbide construction
- Compact case with locating-ring design
Best For: Mixed-size PCB and precision hobby projects
Best Single-Size Value
- Ten matching 1 mm drill bits
- 1/8-inch shank for compatible rotary tools
- Spiral-flute tungsten carbide design
Best For: Repeated 1 mm PCB drilling
Best for 2 mm Holes
- Ten 2 mm tungsten carbide bits
- 1/8-inch shank for most rotary tools
- Positioning ring helps with setup consistency
Best For: Repeat 2 mm PCB and material drilling
Best for 2.5mm holes
2.5mm Tungsten Carbide PCB Bits
- 10-piece set with 2.5mm cutting diameter
- 1/8-inch-compatible straight shanks
- Spiral flutes help clear chips
Best For: Consistent 2.5mm PCB holes
Best diameter range
50-Piece Micro PCB Drill Bit Set
- Covers 0.3mm to 1.2mm sizes
- Five bits are listed for each size
- Storage case protects and organizes bits
Best For: Fine, varied PCB hole sizes
Best for 1.6mm holes
1.6mm Tungsten Carbide PCB Bits
- 10-piece set for 1.6mm holes
- Tungsten carbide with spiral flutes
- Designed for PCB and CNC applications
Best For: Repeatable 1.6mm PCB drilling
Versatile Micro-Bit Kit
- Ten sizes from 0.1mm to 1mm
- Three bits per diameter
- Protective plastic storage case
Best For: DIY users needing multiple PCB drill sizes
Precision 0.4mm Option
- Five bits with a 0.4mm cutting diameter
- 1/8-inch straight shanks
- Spiral flutes for controlled cutting
Best For: Repeat 0.4mm PCB drilling applications
Ultra-Fine Choice
- 0.15mm cutting diameter
- Ten matching tungsten carbide bits
- Approximately 3mm straight shank
Best For: Very fine PCB and precision drilling
Best Size Variety – 50-Piece PCB Drill Bit Set
For rotary tools for PCB drilling, this 50-piece tungsten steel set is a practical choice when you need multiple small hole sizes. It includes ten diameters from 0.3 mm to 1.2 mm, with five bits of each size for replacement coverage.
Best For: PCB work, precision hobby drilling, and users who want a broad selection of micro sizes in one case.
Pros:
- Ten sizes from 0.3 mm to 1.2 mm
- Five bits supplied in each size
- Spiral flutes and sharp cutting edges are designed for clean drilling
- Protective plastic case improves portability and storage
Cons:
- Maximum listed cutting diameter is 1.2 mm
- Straight shanks may require a compatible chuck or holder
This set stands out for its quantity and size coverage. It is especially useful for delicate PCB jobs where having spare bits matters, although buyers should confirm their rotary tool accepts the straight shank.
Best Range – 30-Piece Micro Drill Bits
These micro bits are suited to rotary tools for PCB drilling when your projects call for an unusually wide size range. The set covers 30 sizes from 0.1 mm to 3.0 mm and uses spiral flutes with pointed tips for precision work.
Best For: Makers handling PCB, jewelry, plastic, and other small precision-drilling tasks that require many diameter options.
Pros:
- Offers 30 sizes from 0.1 mm through 3.0 mm
- Tungsten carbide construction provides hardness and wear resistance
- Spiral flutes and pointed tips are intended to reduce cutting force
- Compact case and locating rings help with storage and identification
Cons:
- The set provides one bit per listed size
- The notes do not specify the shank diameter
Its main advantage is flexibility: the 0.1–3.0 mm range covers both extremely small PCB holes and larger general-purpose openings. Verify chuck compatibility before ordering, especially if your rotary tool has a specific collet requirement.
Best Single-Size Value – 1 mm Carbide PCB Bits
If your rotary tools for PCB drilling regularly use 1 mm holes, this ten-piece set keeps the selection simple. Each bit has a tungsten carbide body, a 1/8-inch shank, and a spiral flute intended for accurate, clean drilling.
Best For: Repeat 1 mm drilling in PCBs, plastics, fiberglass, wood, and soft metals with compatible equipment.
Pros:
- Ten replacement bits share the same 1 mm cutting diameter
- 1/8-inch shank fits many rotary-tool setups
- Tungsten carbide offers hardness and wear resistance
- Spiral flute design is intended to reduce cutting force
Cons:
- Only one cutting diameter is included
- Designed for compatible machines and high-precision drilling equipment
This is a focused option rather than a general assortment. It makes sense when 1 mm is the size you use most and having several matching replacements is more useful than carrying a mixed kit.
Best for 2 mm Holes – HARFINGTON 2 mm Carbide Bits
For rotary tools for PCB drilling that use a 2 mm bit, this HARFINGTON set combines ten matching carbide bits with a standard 1/8-inch shank. Its spiral-flute profile is designed to evacuate chips, while the positioning ring can reduce setup adjustments.
Best For: Repeated 2 mm drilling in PCBs and compatible workpieces such as plastic, fiberglass, acrylic, wood, and soft metal.
Pros:
- Includes ten 2 mm tungsten carbide bits
- 1/8-inch shank fits most rotary tools according to the supplied notes
- Positioning ring can help reduce machine adjustment time
- Spiral flute supports chip discharge and reduced vibration
Cons:
- Limited to a single 2 mm cutting diameter
- Requires careful speed control and steady, perpendicular handling
- Coolant or lubricant may be needed to manage friction and heat
This set is best for repeatable 2 mm work rather than varied hole sizes. The positioning ring is a useful setup feature, but correct speed, alignment, and heat control remain important because these are delicate precision bits.
Best for 2.5mm holes – 2.5mm Tungsten Carbide PCB Bits
For rotary tools for PCB drilling when you need a larger, consistent hole size, this 10-piece set provides 2.5mm spiral-flute bits with 1/8-inch-compatible shanks. The tungsten carbide construction and chip-discharging flute design are suited to circuit boards and several light-duty materials.
Best For: PCB drilling machines, engraving tools, and CNC equipment requiring 2.5mm holes.
Pros:
- Includes 10 bits with a 2.5mm cutting diameter.
- Tungsten carbide offers high hardness and wear resistance.
- Spiral flutes are designed to reduce cutting force and help clear chips.
- Positioning rings can reduce installation and commissioning time.
Cons:
- The set is limited to one 2.5mm cutting diameter.
- The bits are uncoated, according to the supplied specifications.
This is a focused option rather than a versatile diameter assortment. Choose it when 2.5mm holes match your PCB, plastic, fiberglass, wood, or soft-metal work.
Best diameter range – 50-Piece Micro PCB Drill Bit Set
For rotary tools for PCB drilling across small hole sizes, this micro-bit set covers diameters from 0.3mm to 1.2mm. It includes five bits in each of 10 sizes, making it useful when PCB, jewelry, plastic, or precision engraving work calls for more than one diameter.
Best For: Fine PCB drilling, precision jewelry work, CNC engraving, and small 3D-printer nozzle tasks.
Pros:
- Provides 10 diameters from 0.3mm through 1.2mm.
- Includes five bits per listed size for replacement capacity.
- Tungsten steel construction is described as wear-resistant and hard.
- Plastic storage case helps with carrying and protection.
Cons:
- These are micro bits, so the largest listed diameter is only 1.2mm.
- The supplied details identify the set as 10 pieces despite the product title stating 50 pieces.
- Small diameters require careful handling during drilling.
Its main advantage is coverage of fine sizes rather than large-hole capacity. Verify the included quantity and compatibility with your rotary tool before buying.
Best for 1.6mm holes – 1.6mm Tungsten Carbide PCB Bits
For rotary tools for PCB drilling that require a smaller fixed hole size, this 10-piece set uses 1.6mm spiral-flute bits with approximately 1/8-inch shanks. The tungsten carbide bits are designed for clean cutting in PCBs and compatible light-duty materials.
Best For: PCB drilling machines, CNC tools, and engraving equipment using 1.6mm holes.
Pros:
- Includes 10 bits with a 1.6mm cutting diameter.
- Tungsten carbide construction is designed for hardness and wear resistance.
- Spiral flutes help reduce cutting force and discharge accumulated chips.
- Positioning rings may simplify installation and setup.
Cons:
- All bits share the same 1.6mm cutting diameter.
- The supplied details list an approximately 3mm, or 1/8-inch, straight shank; confirm tool compatibility.
This set suits repeatable 1.6mm work better than projects needing multiple sizes. Its 10-bit quantity also provides spares for ongoing PCB drilling.
Versatile Micro-Bit Kit – 30-Piece PCB Drill Set
For shoppers comparing rotary tools for PCB drilling, this 30-piece set offers ten small diameters from 0.1mm to 1mm, with three bits in each size. The tungsten steel carbide construction, spiral flutes, and 1/8-inch-compatible round shank make it a flexible choice for detailed DIY work.
Best For: DIY users who need multiple micro-drill sizes for PCBs, jewelry, plastic, glass, or light engraving tasks.
Pros:
- Includes ten diameters, ranging from 0.1mm through 1mm.
- Provides three bits per size for useful replacements.
- Tungsten steel construction is designed for wear resistance and rigidity.
- Comes in a protective, portable plastic case.
Cons:
- The set is uncoated.
- The very small diameters require careful handling during drilling.
This is the most adaptable option of the three when your projects call for different hole sizes. Its broad size range and spare bits are especially practical for hobby work, though precision handling remains important with micro-sized tools.
Precision 0.4mm Option – Tungsten Carbide PCB Bits
When selecting rotary tools for PCB drilling, this five-piece set focuses on a single 0.4mm diameter for consistent, repeatable holes. Its 3.175mm (1/8-inch) straight shank fits PCB drilling machines, engraving equipment, CNC tools, and other compatible precision setups.
Best For: Users who regularly need 0.4mm holes in PCBs, plastics, fiberglass, wood, or soft metals.
Pros:
- Uses tungsten carbide for hardness and wear resistance.
- Spiral flutes are intended to reduce cutting force and improve drilling accuracy.
- Includes five matching replacement bits.
- Offers a standard 1/8-inch shank size for compatible equipment.
Cons:
- Only one cutting diameter is included.
- The bits are uncoated.
This set makes sense for a focused workflow rather than general-purpose sizing. If 0.4mm is the hole diameter you use most often, the matching spares can simplify replenishment and setup.
Ultra-Fine Choice – 10-Piece 0.15mm PCB Bits
For especially fine work with rotary tools for PCB drilling, this set uses a 0.15mm cutting diameter and a compact 2.7mm cutting-edge length. The tungsten carbide spiral-point bits have approximately 3mm straight shanks and are designed for compatible PCB, CNC, and precision drilling equipment.
Best For: Precision users making very small holes in PCBs and working with plastics, fiberglass, wood, or soft metals.
Pros:
- Provides a very fine 0.15mm cutting diameter.
- Includes ten matching bits for replacements.
- Tungsten carbide offers hardness, strength, and wear resistance.
- Spiral-point geometry is designed for accurate cutting and reduced force.
Cons:
- The single diameter limits versatility.
- At 0.15mm, the bits are intended for delicate precision work.
- The uncoated finish may not suit users seeking coated tooling.
This is the specialized pick for projects that demand an exceptionally small bore. It offers useful quantity for a single-size workflow, but buyers should confirm their equipment and handling technique are suitable for 0.15mm bits.
How We Picked the Best Rotary Tools for Pcb Drilling
We focused on the factors that matter most for small, accurate holes: bit diameter range, carbide or carbide-style construction, flute design, shank compatibility, quantity, and intended use. The selection includes single-size packs for repeat drilling as well as broad assortments for prototyping and repair work.
Because PCB drilling demands more control than ordinary household drilling, we also favored options designed for rotary tools, CNC work, jewelry, plastics, or printed circuit boards. Always verify the seller’s specifications, since material descriptions and size tolerances can vary between listings.
Quick Comparison
| Best For | What to Look For | Useful Choice From This Roundup |
|---|---|---|
| Mixed hole sizes | Assortment covering approximately 0.1 to 3.0 mm | 30-piece micro drill bit sets |
| Common PCB drilling | Small spiral-flute carbide bits around 0.3 to 1.2 mm | 50-piece assorted sets |
| Repeated single-size work | Multiple identical bits in the required diameter | uxcell 1 mm, 1.6 mm, or 2.5 mm packs |
| Ultra-fine holes | Very small diameters with careful feed control | 0.15 mm or 0.4 mm options |
Key Buying Factors for Rotary Tools for Pcb Drilling
Bit Diameter
Diameter determines the finished hole size and strongly affects durability. Bits below 0.5 mm are useful for fine traces and miniature work but are especially easy to snap. Larger sizes are more forgiving and may suit mounting holes, plastics, or jewelry projects.
Material and Flute Design
Tungsten carbide is commonly chosen for precision PCB bits because it is hard and resists wear. Spiral flutes help clear material, but they do not eliminate the need for a steady hand, light pressure, and appropriate speed. Avoid forcing a bit through the board.
Shank Compatibility
Many products here use a 1/8-inch shank, which fits numerous rotary tools and collets. Confirm your tool’s chuck or collet range before ordering. A bit may fit the nominal diameter while still requiring a separate adapter or precision collet.
Quantity and Size Coverage
Choose an assortment if you are still determining your preferred hole sizes or work on varied boards. A single-size multipack is usually more economical for production, repairs, or a frequently repeated design.
Who Should Buy Which Rotary Tools for Pcb Drilling?
Beginners and makers will generally get the most flexibility from a broad 30- or 50-piece assortment. These sets let you test sizes without buying several separate packs. For repeat fabrication, choose a multipack centered on the exact diameter your board requires. Buyers making extremely small holes should select the finest available option only if they can support the necessary alignment and speed control.
Whichever set you choose, use eye protection, secure the PCB firmly, and inspect bits for damage before each job. A drill press, guide, or stable rotary-tool stand can improve accuracy and reduce breakage, particularly with sub-0.5 mm bits.