Best CNC Bits for Jewelry Making (2026)

Specs compared

Specifications are manufacturer rated, as published on each listing and collected 21 October 2026. Where a listing states a figure two ways, the table shows both.

What the listings tell you

Two listings have odd figures. The Mudder table lists 57 flutes, which is the piece count, not a flute count; treat the flute figure as unclear. The uxcell table lists a surface recommendation of “Fi, Metal, Polycarbonate, Wood”, where “Fi” reads as a truncated word; the bullets list PC boards, plastics, fiberglass, wood and soft metals instead.

Buying guide: the best cnc bits for jewelry making

Material: tungsten carbide or steel

All five are tungsten carbide or tungsten steel: the Mudder mini drills are tungsten carbide, the Lothee and uxcell are tungsten carbide, and the KEWAYO and Sunxeke are tungsten steel. The listings state high hardness, wear resistance and resistance to bending. For jewelry metals and stone, carbide holds an edge longer than plain high-speed steel.

Size range and count

The Mudder covers 0.1 to 3 mm across 46 micro twist bits plus 10 PCB bits and a pin vise: 57 pieces total. The Sunxeke covers 0.1 to 1 mm in 10 sizes with 3 of each size (30 pieces). The KEWAYO covers 0.3 to 1.2 mm in 10 sizes (10 pieces). The Lothee covers 1.1 to 2.0 mm in 10 sizes with 3 of each (30 pieces in 3 boxes). The uxcell is a single 2.5 mm size in 10 pieces. Buy the range your work needs: fine holes for beads and wire, larger for stone settings.

Points and shanks

Points are stated as twist point (Mudder), spear point (Lothee), split point (Sunxeke, 118 degrees) and spiral (uxcell), all with 2 flutes except the Mudder oddity. The Lothee states pointed cutting edges that reduce cutting force and prevent breakage; the Sunxeke states an anti-vibration design for stability. Shanks are straight on most, round on the Sunxeke, and the uxcell states a 3 mm (1/8 in) shank with a positioning ring for fast setup. The Mudder pin vise clamps 0.3 to 3.4 mm with a 3-claw chuck for hand work.

Storage

Micro bits are easy to lose. The Lothee ships in 3 boxes, the KEWAYO in a durable plastic case with size-marked slots, and the Sunxeke in a plastic box. The Mudder and uxcell listings state no case. A marked case keeps sizes sorted and protects the fragile tips.

Working with micro bits

Hand work with the pin vise

The Mudder set is the only one with a pin vise: an aluminum hand drill with a 3-claw chuck that clamps 0.3 to 3.4 mm and a rotating tail. For beads, soft stone and resin, hand drilling gives control that a power tool cannot: you feel the bit bite and stop before it breaks through. Twist the vise slowly and let the bit cut; pressing hard snaps micro bits.

Speeds and feeds

Micro bits cut best at high speed and light feed. The Lothee and Sunxeke listings stress reduced cutting force and anti-vibration design for this reason: at 1 mm and below, side pressure bends the bit before it cuts. Peck the hole: drill a little, back out to clear chips, drill again. The spiral flutes on all five clear chips, but backing out is still the best insurance against a snapped bit.

Bit care and breakage

Micro bits are consumable: buy sets with spares for the sizes you use most, like the Lothee and Sunxeke with 3 of each size. A bit that walks on entry dulls fast, so the 118 degree split points on the Lothee and Sunxeke help start cleanly. Store bits in their cases: a tip knocked against metal is a tip that cuts oval holes. When a bit starts to squeal or needs force, retire it.

Jewelry materials

The listings name resin, beads, polymer clay, amber beeswax, wood, plastic, fiberglass, circuit boards, glass, metal and soft metals. For hard stone and glass, run the bit wet if your setup allows it; for resin and polymer clay, slow speeds avoid melting. The Sunxeke and KEWAYO are the best fits for fine stone and glass work at the small end; the uxcell 2.5 mm suits larger settings and inlay.

Matching the set to your machine

Shank fit decides which set works in your tool. The uxcell bits have a 3 mm (1/8 in) shank with a positioning ring, stated for PCB drilling machines, engraving machines, CNC and high precision drilling equipment: a standard 1/8 in collet takes them directly. The Sunxeke set is listed for most rotary tools with a round shank. The Lothee title names the CNC router shank. For anything under about 1 mm, or for hand work, the Mudder pin vise clamps 0.3 to 3.4 mm in a 3-claw chuck, and its mini drills carry a 3.175 mm shank at 38 mm overall length. Check your collet size before you buy: bits smaller than your smallest collet need the pin vise.

Spares and sizes for jewelry work

Buy spares for the sizes you actually drill. The Lothee and Sunxeke sets give 3 of each size across 10 diameters: 1.1 to 2.0 mm on the Lothee, 0.1 to 1 mm on the Sunxeke. The KEWAYO gives one of each size from 0.3 to 1.2 mm in a marked case, and the uxcell gives ten pieces of a single 2.5 mm size. For bead and wire holes, stay at the small end with the Sunxeke or KEWAYO; for stone settings and inlay, the Lothee range and the uxcell 2.5 mm fit better. The Mudder spans 0.1 to 3 mm across 46 twist bits plus 10 PCB bits, so it covers both ends in one box. Both the KEWAYO and Sunxeke listings name 3D printer nozzle cleaning as a use, which is a handy second job for the fine sizes.

How the scores add up

Each set is scored on performance, build, value, safety and warranty, using only what the listing publishes. A spec the listing does not publish scores nothing.

Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score. Safety counts only for powered gear or where the listing states safety features; where it does not apply, the score is taken over the remaining 90 points.

FAQ: lasers and CNC

What size bits for jewelry making?

The sets here cover 0.1 to 3 mm. Fine holes for beads and wire use the small end; stone settings use the larger end.

Carbide or steel for jewelry metals?

All five are tungsten carbide or tungsten steel, which the listings state resists wear and bending better than plain steel.

Do these fit a rotary tool?

The Sunxeke is listed for most rotary tools, the uxcell for rotary tools and engraving machines, and the Mudder pin vise clamps 0.3 to 3.4 mm for hand work.

Which of these states a warranty?

No warranty term is stated on any of the five listings.

Related: the CNC tooling hub, our best CNC router bits and the best CNC router bits picks.