Best PCB Drill Bits: 9 Picks in 2026

A PCB drill bit can look tiny enough to lose in a carpet, yet a difference of a few tenths of a millimeter can decide whether a hole fits a component lead or turns into a ragged mess. Buyers searching for the best PCB drill bits usually need clean micro-holes in circuit boards, but the same bits may also be used for plastics, jewelry, bakelite, nozzle cleaning, or small CNC work. That broad use makes diameter range, shank format, and machine compatibility especially important.

The common mistake is buying a large assortment without checking how the bits will be held. A set may cover 0.1 mm to 3.0 mm, yet the listed shank, machine requirement, or individual size distribution may matter more than the headline piece count. Carbide and tungsten carbide descriptions also need careful reading, since these products are intended for delicate precision drilling rather than casual, high-force handheld work. The strongest all-around fit here is the Genmitsu PD30A because it provides a clearly documented 1/8-inch shank and one size from 0.1 mm through 3.0 mm.

Different buyers will value different details. A hobbyist may want a pin vise and assorted twist drills, a PCB maker may prefer several replacements in common diameters, and a CNC user may need a defined shank size. The recommendations below weigh those distinctions rather than treating every micro-drill assortment as interchangeable.

Quick Answer

• Best Overall: Genmitsu PD30A for its documented 1/8-inch shank and complete 0.1 mm to 3.0 mm size progression.
• Best for Replacement Stock: WayinTop 50-Piece Set because it supplies five pieces in each of ten common sizes from 0.3 mm to 1.2 mm.
• Best for Hand Work: Mudder Micro Drill Bits and Pin Vise Set for its included adjustable hand tool and separate PCB mini bits.
• Best for a Single Size: uxcell 1 mm PCB Drill Bits for its documented 1 mm cutting diameter and 1/8-inch shank.

Best PCB Drill Bits Comparison Table

The detailed reviews below sort these sets by diameter coverage, handling format, and the information supplied for machine compatibility.

1. WayinTop 50-Piece PCB Drill Bits Set, Best Overall

The WayinTop set is a practical fit for the buyer who repeatedly reaches for small, familiar PCB diameters and wants replacements close at hand. It includes ten sizes from 0.3 mm through 1.2 mm, with five pieces of each size. That distribution is more useful than a one-of-everything assortment for a hobby bench where a fragile micro-bit may need replacing after a mishap.

Its spiral-flute carbide construction and sharp cutting edges are identified for circuit boards, bakelite, plastics, jewelry, and other precision work. The supplied information does not identify a shank diameter or a particular machine interface, so the buyer should confirm the holder before ordering. The plastic storage box is a welcome touch for bits this small, since a loose 0.4 mm cutter can disappear beneath a pile of components in seconds.

Pros

• Includes five pieces in each of ten sizes.
• Covers useful diameters from 0.3 mm to 1.2 mm.
• Uses a documented spiral-flute cutting design.
• Listed for PCB, bakelite, plastic, jewelry, and precision drilling work.
• Includes a protective plastic storage box.

Cons

• The supplied information does not specify the shank diameter or holder interface.
• The range begins at 0.3 mm, so it does not cover the smallest 0.1 mm and 0.2 mm sizes.

This set suits PCB hobbyists who use common sub-1.2 mm holes and would rather have several replacements than a single piece in every diameter. Buyers needing a complete 0.1 mm to 3.0 mm spread should look toward Genmitsu or OwnMy instead. Its central advantage is sensible duplication, provided the shank matches the intended equipment.

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2. Lothee 30-Piece Micro Drill Bits Set, 0.1 mm to 1.0 mm, Best for Tiny Holes

For very small PCB holes, the Lothee 0.1 mm to 1.0 mm set puts its emphasis in the right part of the diameter range. It includes three pieces each of 0.1 mm through 1.0 mm, giving the buyer several chances with the smallest cutters instead of treating those delicate sizes as a one-shot purchase. The pointed cutting edges and spiral flutes are listed as features intended to reduce cutting force and debris.

The three-box arrangement keeps the size groups easier to separate than a loose bag of micro-tools. Lothee identifies this set for circuit boards, CNC-engraved jewelry, plastics, hardware, and stone work. The listing refers to a shank for CNC router use but does not provide a specific shank diameter in the supplied information, so machine fit needs checking before purchase. That detail matters most here because a tiny bit still needs a secure, suitable holder.

Pros

• Starts at a documented 0.1 mm diameter.
• Includes three pieces in each size through 1.0 mm.
• Uses pointed cutting edges and spiral flutes.
• Supplied in three storage boxes.
• Listed for PCB, plastic, hardware, jewelry, and precision work.

Cons

• Stops at 1.0 mm, leaving larger PCB diameters outside its range.
• The supplied details do not state the exact shank diameter.

This is the better match for a buyer whose drawings call for holes below 0.3 mm or who wants a small-diameter replacement supply. It is less useful as a standalone general-purpose set for mixed-size projects. Check the machine or collet specification carefully, especially if the intended setup is a CNC router rather than a dedicated PCB drilling machine.

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3. Mudder 57-Piece Micro Drill Bits and Pin Vise Set, Best for Hand Work

The Mudder set takes a different route from the CNC-focused assortments. Alongside ten PCB mini drill bits, it includes 46 micro twist drills and an aluminum-alloy pin vise with a three-jaw chuck. The chuck is listed as adjustable from 0.3 mm to 3.4 mm, making this package useful for careful manual work on small craft pieces, model parts, and light electronic assembly.

The PCB mini bits have a documented shank diameter of approximately 3.175 mm and an overall length of approximately 38 mm. The product information identifies them for FR-4 and CEM-3 boards, plastics, carbon fiber, molds, and composite board. That makes the set easier to evaluate than many generic micro-bit assortments, although the hand-drill portion and PCB portion serve different jobs. Think of it as a compact craft kit with a PCB subset rather than a dedicated nine-size production supply.

Pros

• Includes an adjustable aluminum-alloy pin vise.
• Provides a documented 0.3 mm to 3.4 mm chuck range.
• Includes 46 micro twist drills and 10 PCB mini bits.
• PCB bit shanks are listed at approximately 3.175 mm.
• PCB mini bits are identified for FR-4, CEM-3, plastics, and composite board.

Cons

• Only ten of the 57 pieces are identified as PCB mini drill bits.
• The assortment combines PCB cutters with twist drills intended for broader craft work.

Choose this set for manual drilling, model making, jewelry work, or electronics tasks where a pin vise is part of the plan. A buyer setting up a CNC workflow will likely prefer a set with a clearly defined machine shank and a more focused PCB diameter layout. The trade-off is breadth of hand use in exchange for fewer dedicated PCB replacements.

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4. Lothee 60-Piece Micro Drill Bits Set, 0.3 mm to 3.0 mm, Best for Multiple Backups

The 60-piece Lothee set is aimed at buyers who want a generous selection and more than one piece in each listed size. The supplied details identify five boxes and 60 tungsten carbide micro-drills, with two pieces per size across a range beginning at 0.3 mm and extending to 3.0 mm. That spread moves from delicate PCB holes into larger precision openings used in broader engraving and craft applications.

Pointed edges, spiral flutes, and an anti-vibration blade design are listed features. Those descriptions explain the intended geometry, but they do not establish a universal machine fit or guarantee a particular result on every board. The box layout is useful for sorting, especially when 0.6 mm, 0.8 mm, and 1.0 mm bits look nearly identical under ordinary bench lighting.

Pros

• Includes 60 pieces across a broad 0.3 mm to 3.0 mm range.
• Provides two pieces per listed size.
• Uses pointed cutting edges and spiral flutes.
• Arrives in five storage boxes.
• Listed for PCB drilling, CNC engraving, jewelry, plastics, and hardware.

Cons

• Does not include the 0.1 mm and 0.2 mm sizes.
• The supplied details do not identify a precise shank diameter.

This assortment makes sense for a mixed precision workspace that moves between small boards, plastic parts, and engraving projects. It is less targeted than the WayinTop set for buyers who repeatedly use only 0.3 mm to 1.2 mm sizes. Select it when the wider range and two-per-size format are more useful than a clearly stated holder specification.

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5. OwnMy 40-Piece PCB Drill Bits Set, Best for Organized Diameter Coverage

OwnMy divides its assortment into four boxes: two covering 0.1 mm to 1.0 mm, one covering 1.1 mm to 2.0 mm, and one covering 2.1 mm to 3.0 mm. That organization gives the buyer a quick visual route through the diameter range, which is handy when a project moves from tiny component holes to larger mounting openings.

The listing identifies pointed spiral cutting edges, locating rings, vibration-resistant blades, and tungsten steel construction. It also lists circuit boards, bakelite, plastic, jewelry, and CNC engraving among the intended uses. The instruction to confirm specifications in the product images is significant, since the box arrangement and individual size count should be checked against the exact drilling plan before purchase.

Pros

• Covers a documented 0.1 mm to 3.0 mm range.
• Uses four boxes arranged by diameter groups.
• Includes a locating-ring design according to the listing.
• Lists pointed spiral cutting edges and vibration-resistant blades.
• Identified for PCB, plastic, bakelite, jewelry, and CNC work.

Cons

• The listing specifically asks buyers to confirm the size arrangement before purchase.
• The supplied information does not state an exact shank diameter.

OwnMy fits a buyer who values a full size sweep and compartmentalized storage. It may be less attractive than Genmitsu for a setup that requires a plainly documented 1/8-inch shank. The key decision is whether organized coverage from 0.1 mm to 3.0 mm matters more than having one bit in every diameter or a defined holder interface.

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6. Genmitsu PD30A 30-Piece PCB Drill Bits Set, Best for a Defined CNC Setup

The Genmitsu PD30A takes the top overall position because its key fit information is unusually clear. Every size from 0.1 mm through 3.0 mm is represented, and the set uses a documented 1/8-inch shank. For a CNC or engraving setup built around that interface, this removes a major question that remains open with several competing assortments.

The 30 pieces are divided into three ten-piece boxes covering 0.1 mm to 1.0 mm, 1.1 mm to 2.0 mm, and 2.1 mm to 3.0 mm. The listing describes tungsten carbide steel alloy, spiral-flute cutting edges, and a seismic blade design. It also identifies printed circuit boards, bakelite, plastics, jewelry, and 3D-printer nozzle cleaning as applications. A one-per-size layout gives range, though it provides fewer duplicates for a frequently used diameter.

Pros

• Includes every listed diameter from 0.1 mm through 3.0 mm.
• Uses a documented 1/8-inch shank.
• Separates the range into three protective boxes.
• Lists spiral-flute cutting edges and a seismic blade design.
• Identified for PCB, plastic, bakelite, jewelry, and CNC engraving work.

Cons

• Provides one piece per diameter rather than multiple replacements.
• A 1/8-inch shank may not match equipment built for another holder size.

This is the strongest match for a buyer who has verified a 1/8-inch holder and wants a single, orderly run from micro sizes to 3.0 mm. Choose WayinTop or Lothee if repeated replacements in common small diameters matter more. For the right machine, however, the PD30A gives the clearest relationship between the bit set and the holder.

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7. Sunxeke 30-Piece Micro Drill Bits Set, Best for Rotary-Tool Versatility

Sunxeke presents a full 30-size progression from 0.1 mm to 3.0 mm, with one piece for each listed diameter. The product is presented for most rotary tools and combines PCB drilling with stone grinding, CNC engraving, jewelry work, plastic, and 3D-printer nozzle tasks. That wider application language may appeal to a DIY user whose small rotary tool handles several materials rather than boards alone.

The listed construction is tungsten steel carbide, with sharp, grooved cutting edges and a seismic design. The plastic case keeps the tiny pieces together, but the supplied details do not state a specific shank diameter. That omission makes the buyer’s rotary-tool collet and machine instructions especially important. A complete size range is useful only when the intended tool can hold the bits securely and appropriately.

Pros

• Covers 30 individual diameters from 0.1 mm to 3.0 mm.
• Listed for rotary tools, PCB work, CNC engraving, and jewelry.
• Uses spiral-flute cutting edges.
• Includes a vibration-oriented blade design according to the listing.
• Comes in a protective plastic box.

Cons

• The supplied information does not state the exact shank diameter.
• One piece per size leaves no duplicate for a frequently used diameter.

Sunxeke suits a DIY buyer who wants one broad assortment for small rotary-tool projects and board work. It should be bypassed when a precise 1/8-inch interface is a firm requirement and documentation is needed before purchase. Its main trade-off is wide application coverage with less clearly documented holder information than the Genmitsu set.

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8. FBT 4.00 mm Cemented Carbide PCB Drill, Best for a Single Large Hole

The FBT drill is a specialist pick rather than a general assortment. Its defining specification is a 4.00 mm diameter, and the listing identifies it as a cemented carbide PCB mini drill intended for PCB drill-bit machine use. That makes it relevant for a project with a known larger hole requirement, such as a board opening that falls outside the 0.1 mm to 3.0 mm ranges covered by most sets here.

There is very little additional dimensional information in the supplied record. Shank size, overall length, flute details, and machine interface are not established, so those points need confirmation before purchase. The focused format can be useful when a particular diameter is all that matters, but it is a poor match for a buyer expecting a flexible box of replacement bits.

Pros

• Provides a documented 4.00 mm cutting diameter.
• Identified as cemented carbide.
• Listed specifically for PCB drilling machine use.
• Targets a diameter larger than the other reviewed PCB assortments.
• Offers a single-size solution for a defined drilling requirement.

Cons

• The supplied details do not specify the shank diameter.
• The record does not provide overall length, flute length, or broader size choices.

Choose FBT only after confirming that 4.00 mm is the required diameter and that the machine accepts the bit. For ordinary PCB prototyping, its single-size format is far less flexible than Genmitsu, OwnMy, or WayinTop. Its value lies in addressing a specific hole size, not in replacing a complete micro-drill assortment.

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9. uxcell 1 mm Tungsten Carbide PCB Drill Bits, Best for Repeated 1 mm Holes

The uxcell set is refreshingly specific. It contains ten bits with a documented 1 mm cutting-edge diameter, approximately 9.5 mm cutting-edge length, approximately 38 mm overall length, and a 3 mm shank described as approximately 1/8 inch. For a buyer whose board layout repeatedly calls for 1 mm holes, this format avoids paying for sizes that will sit untouched in a drawer.

The spiral-flute design is listed for PCB drilling, plastics, fiberglass, wood, and soft metals, with compatibility identified for PCB drilling machines, engraving machines, CNC equipment, and high-precision special drilling equipment. Those application statements do not establish compatibility with every handheld tool, so the holder still needs checking. The real strength is repeatability of size selection, with ten matching pieces in the box.

Pros

• Provides ten bits with a documented 1 mm cutting diameter.
• Lists an approximately 3 mm, or 1/8-inch, shank.
• Documents approximately 9.5 mm cutting-edge length.
• Documents approximately 38 mm overall length.
• Identified for PCB machines, engraving machines, CNC equipment, and precision drilling.

Cons

• Offers only the 1 mm diameter.
• The listing does not establish suitability for every handheld rotary tool.

uxcell is the focused purchase for repeated 1 mm work, especially where the listed dimensions help confirm fit. It is a poor substitute for a mixed-diameter set, and buyers working with 0.3 mm or 0.8 mm holes will need another size. For a defined production or repair task, however, ten matching bits can be more useful than a larger assortment.

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Buying Guide

Match the Diameter to the Board

PCB drill sizes are small enough that a 0.1 mm difference can change the fit around a component lead or mounting hole. Start with the hole drawing or the component requirement, then select a set that places the needed diameter near the middle of its usable range. A 0.1 mm to 3.0 mm assortment gives breadth, while a 0.3 mm to 1.2 mm set with multiple copies may be better for repeated common holes.

Check PCB drill size and finished-hole differences before choosing the nominal cutter diameter.

Check the Shank Before Ordering

A cutting diameter describes the hole, not necessarily the part held by the machine. The Genmitsu set documents a 1/8-inch shank, the uxcell bits list an approximately 3 mm shank, and the Mudder PCB mini bits list approximately 3.175 mm. Several other products in this roundup do not state a precise shank dimension in the supplied information. Confirm the collet, chuck, or PCB drilling machine requirement before buying.

Choose Between One of Each Size and Replacements

A full size run is useful when a project changes frequently. Genmitsu and Sunxeke provide one piece in each listed diameter from 0.1 mm to 3.0 mm, while WayinTop supplies five pieces in each of ten sizes. If the same hole appears across many boards, duplicate pieces can matter more than a long range that includes sizes you rarely use.

Understand the Material Description

The products here use wording such as tungsten carbide, tungsten carbide steel alloy, or cemented carbide. Those descriptions identify the listed tool material, but they do not establish a universal performance level or a guarantee against breakage. Micro-drills remain delicate precision tools. Use the machine, holder, and operating guidance specified for the particular bit rather than treating every carbide drill as interchangeable.

Separate PCB Bits from General Craft Drills

The Mudder and Vinsot-style hand-drill kits include broader twist-drill assortments alongside PCB mini bits. That can be handy for models, resin, clay, wood, and jewelry, but the extra pieces do not automatically improve PCB drilling. A dedicated set such as WayinTop or Genmitsu gives a clearer diameter and application focus.

Plan Storage Around Bit Size

Micro-drills are easy to mix up and easy to lose. Boxes divided by diameter make daily work less frustrating, especially when 0.6 mm and 0.7 mm tools look nearly identical. Keep the smallest bits protected, and return each piece to its labeled position after use. A tidy box is a practical feature because it prevents unnecessary searching and size confusion.

Best PCB Drill Bits FAQ

What Size PCB Drill Bit Should I Buy?

Use the hole diameter required by the board layout or component lead. Common sets in this roundup cover 0.1 mm through 3.0 mm, while the WayinTop set focuses on 0.3 mm through 1.2 mm. If the project uses one repeated diameter, a multi-piece single-size set such as the 1 mm uxcell option may be more useful.

Are These PCB Drill Bits Suitable for a Handheld Drill?

Do not assume that every PCB bit fits a handheld drill. Several listings identify CNC, PCB drilling machine, engraving machine, or rotary-tool use, and many do not state a complete holder specification. Check the shank diameter and the equipment instructions before mounting a bit. The Mudder set is the clearest manual option because it includes an adjustable pin vise.

What Is the Advantage of a Spiral Flute?

A spiral flute forms the cutting edge and provides a path for material to move away from the hole. The product listings describe spiral flutes as a feature intended to reduce cutting force and debris. That description explains the design purpose, but it does not guarantee identical results across machines, boards, or operating conditions.

Is a 1/8-Inch Shank the Same as a 3.175 mm Shank?

They are very close in nominal size, since 1/8 inch equals 3.175 mm. Still, use the exact holder guidance for the product and machine. Genmitsu explicitly lists a 1/8-inch shank, Mudder lists approximately 3.175 mm for its PCB mini bits, and uxcell lists approximately 3 mm, described as approximately 1/8 inch.

Should I Buy a Full Range or Several Copies of Common Sizes?

Choose a full range if your work changes from board to board or includes larger openings. Choose duplicates if your designs repeatedly use a narrow group of diameters. Genmitsu covers 0.1 mm through 3.0 mm with one of each size, while WayinTop supplies five pieces each of ten sizes from 0.3 mm through 1.2 mm.

Can PCB Drill Bits Be Used on Other Materials?

Several products list plastics, bakelite, jewelry, fiberglass, wood, soft metals, or nozzle cleaning among their applications. Those statements apply to the listed product descriptions and should not be read as universal permission for every material or machine. Confirm the product guidance and holder requirements before using a bit outside PCB work.

What Should I Do if the Listing Does Not State the Shank Size?

Treat the missing dimension as an unresolved compatibility question. A broad diameter range does not tell you whether the bit will fit your collet, chuck, or drilling machine. Select a product with a documented interface, such as Genmitsu or uxcell, or verify the dimension from the current product listing before purchase.

Final Verdict

The Genmitsu PD30A is the strongest overall recommendation because it combines a complete 0.1 mm to 3.0 mm diameter progression with a clearly documented 1/8-inch shank and separated storage boxes. Those details address two of the biggest PCB-drilling decisions at once: having the required size and knowing what holder interface the set is intended to use. Its one-piece-per-size layout is the main trade-off.

WayinTop is the better pick for repeated work in common 0.3 mm to 1.2 mm sizes, while Lothee’s 0.1 mm to 1.0 mm set suits buyers focused on very small holes. Mudder is the manual-work alternative, uxcell makes sense for repeated 1 mm drilling, and FBT serves a narrow 4.00 mm requirement. Before ordering, match the drill diameter to the board, confirm the shank or machine fit, and choose replacement quantity based on the sizes your projects actually use.