Best Pcb Drill Bits 0.5 Mm (2026): 5 Compared

Specs compared

Specifications are manufacturer rated, as published on each listing and collected 25 October 2026.

Buying guide: the best pcb drill bits 0.5 mm

Cutting diameter and shank

Cutting diameter decides the hole. The three full-data listings all cut 0.5 mm, with shanks of 3.175 mm on the 40-piece uxcell set and the PATIKIL set, and 3 mm on the 2-set uxcell listing, each described as 1/8 inch approx. The two range sets cover wider spans instead: the WayinTop set runs 0.3 to 1.2 mm and the Lothee set runs 0.1 to 1.0 mm, so the range sets are not 0.5 mm sets, and neither title-only listing says how many pieces measure 0.5 mm. Check the shank against the collet or chuck before ordering, since a shank that does not match cannot be held.

Flute length and overall length

Flute length decides how deep one pass cuts. The PATIKIL bits list a 10 mm flute length, while both uxcell listings list 7 mm. Overall length is 38 mm on all three full-data listings, stated as 1-1/2 inch on the uxcell listings and 1.5 inch on the PATIKIL listing. The range sets state no flute or overall length, so depth planning rests on the three full-data listings alone.

Point angle and flute count

Point angle and flute count change how a bit starts and clears waste. The PATIKIL listing states a 135 degree point angle, and the 2-set uxcell listing states 118 degrees, while the 40-piece uxcell listing states no point angle. Flute count also differs: the 40-piece uxcell set lists 1 flute and the 2-set lists 2 flutes, both with a spiral flute type. The range sets state no point angle or flute count, so compare those figures only across the listings that state them.

Piece count and set ranges

Piece count decides how many spares one purchase holds. The 40-piece uxcell set holds 40 pieces and the PATIKIL set holds 30 pieces. The 2-set uxcell listing describes 2 sets in its title, and the range sets hold 50 and 30 pieces across a span of diameters rather than one size, so compare piece counts only after checking which diameters a set actually covers.

Materials and machines

Listed uses decide fit. The uxcell listings name PC boards, plastics, fiberglass, wood and soft metals, for PCB drilling machines, engraving machines, CNC and high precision special drilling equipment. The PATIKIL listing names PCB micro-hole drilling and precision machinery, with aluminum as its surface recommendation, and its instructions say to clamp the workpiece firmly, position the bit at 90 degrees to the workpiece, and drill thick materials in multiple passes. The range sets name their uses only in their titles, with no bullets or spec table behind them, so machine and material fit rests on the three full-data listings.

Project Match

• PCB micro-hole drilling: the PATIKIL set and both uxcell sets, all with a 0.5 mm cutting diameter.
• Engraving and jewelry work: the uxcell listings, which name engraving machines and jewelry use.
• A spread of diameters in one purchase: the WayinTop and Lothee range sets.
• Materials stated: PC boards, plastics, fiberglass, wood and soft metals for the uxcell listings; aluminum for the PATIKIL listing; not stated beyond the titles for the range sets.

How the scores add up

The HQ Score weighs performance, build, value, safety and warranty. For pcb drill bits, safety means stated safety features, and no pick here states one. No pick states a warranty term either, so safety and warranty score nothing across this guide.

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 are pcb drill bits?

They are micro drill bits for circuit board holes and fine engraving work. In these listings, the full-data sets cut 0.5 mm with tungsten carbide bits and 1/8 inch shanks, for PCB drilling machines, engraving machines and CNC equipment.

What shank size do these bits use?

The 40-piece uxcell set and the PATIKIL set use a 3.175 mm shank, and the 2-set uxcell listing uses a 3 mm shank, each described as 1/8 inch approx. The range sets state no shank size.

Do the range sets contain only 0.5 mm bits?

No. The WayinTop set spans 0.3 to 1.2 mm and the Lothee set spans 0.1 to 1.0 mm, and neither title-only listing says how many pieces measure 0.5 mm. For a 0.5 mm hole alone, the three full-data sets cut 0.5 mm.

What point angles do the listings state?

The PATIKIL listing states 135 degrees and the 2-set uxcell listing states 118 degrees. The 40-piece uxcell listing and the range sets state no point angle.

Can these bits drill steel?

No listing here states steel. The uxcell listings name soft metals among their uses, and the PATIKIL listing names aluminum, so do not assume a steel use from the carbide material.

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