Drill bit Proxxon 28876 — replacement rotary tool bit by Proxxon

Proxxon 28876 is a 6-piece set of replacement rotary tool drill bits designed for precision spot drilling in wood and plastic. The set includes sizes 1/64", 5/64", 3/32", 1/8", 9/64" and 5/32" (1.5, 2.0, 2.5, 3.0, 3.5 and 4.0 mm) and is intended for use with Proxxon rotary tools and other compatible precision drills that accept a 3 mm (7/64") shank. Each bit features a titanium nitride coating to reduce friction and extend service life. Spiral (twist) length is 28 mm and overall bit length is 50 mm, making the set suitable for fine hobby, model-making and light workshop tasks.

Advantages

The titanium nitride coating lowers friction during drilling and improves wear resistance for longer service intervals. A consistent 3 mm shank size allows secure mounting in collets and chucks designed for small rotary tools. The included range of diameters covers common precision drilling needs from 1.5 mm up to 4.0 mm, enabling accurate spot drilling in thin materials. The compact overall length and 28 mm spiral length provide control and visibility when working on small components.

Suitable for

• Hobby and model-making drilling in wood and plastic
• Precision spot drilling for small assemblies and fixtures
• Light workshop tasks requiring small diameter holes
• Use with Proxxon rotary tools and compatible precision drills

Key specifications

• Set composition: 6 drill bits — 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm
• Coating: titanium nitride (TiN) for reduced friction and improved durability
• Shank diameter: 3 mm (7/64") suitable for small tool collets
• Spiral (twist) length: 28 mm
• Total bit length: 50 mm
• Primary materials: suitable for drilling wood and plastic

How to use

Select the appropriately sized bit for the required hole diameter and insert the 3 mm shank into a compatible collet or chuck. Secure the bit firmly to avoid slippage, set the rotary tool to a moderate speed appropriate for wood or plastic, and advance the bit with steady, controlled pressure. For precise spot drilling, pilot marks or center punch indentations can help maintain position. Retract periodically to clear chips and avoid overheating; the TiN coating helps reduce friction but does not eliminate the need for correct speeds and feed.

Usage recommendations

Use low to medium rotational speeds for plastics and moderately higher speeds for softer woods, apply light steady pressure, and avoid side loads on the small-diameter bits. Store the set in a protective case or holder to preserve tip geometry and coating.