Engraver bit Proxxon 28240 — stainless steel, 1.98 mm diameter

Proxxon 28240 is a stainless steel engraver bit with a 1.98 mm working diameter and a 3/32" (2.35 mm) stainless steel shank. The tool is coated evenly with diamond dust to provide consistent cutting and grinding performance on hard materials. It is intended for fine-detail engraving, finishing and precision shaping on substrates such as hardened steels (including chrome-cobalt alloys), glass, gemstones, ceramics, porcelain and various plastics. The single-piece design and hard abrasive coating make this bit suitable for use with compatible rotary tools and micro-engravers in hobby, jewellery and light industrial work.

Advantages

The diamond-dust coating delivers uniform abrasive action across the tip, enabling precise material removal and consistent surface finish. A hard stainless steel shank provides corrosion resistance and stable mounting in collets designed for 3/32" shafts. The small 1.98 mm diameter allows access to fine details and narrow grooves while retaining durability for use on hard substrates. Supplied as a single high-quality piece for straightforward replacement and control.

Suitable for

• Precision engraving and detailing on metal and non-metal surfaces
• Jewellery repair and finishing work
• Model making and hobby shaping
• Grinding and finishing of glass, ceramics and stones
• Light industrial deburring and toolroom tasks

Key specifications

• Working diameter: 1.98 mm
• Shank diameter: 3/32" (approx. 2.35 mm)
• Material: stainless steel shank with diamond-dust abrasive coating
• Intended uses: engraving, grinding, finishing, detailing
• Pack contents: 1 piece

How to use

Install the bit securely in a compatible rotary tool or micro-engraver collet sized for a 3/32" (2.35 mm) shank. Start at low speed and increase RPM as needed for the material and desired effect; higher speeds are generally used for harder materials but should be balanced to avoid overheating. Apply light, steady pressure and allow the diamond-dust coating to abrade the workpiece rather than forcing the bit. Use short, controlled passes for fine detail and withdraw periodically to clear debris and inspect the surface.

Usage recommendations

Use appropriate personal protective equipment such as eye protection and a dust mask when working with hard materials. For glass, ceramics and stone, consider coolant or intermittent contact to reduce heat and prolong abrasive life. Check collet tightness before each use and replace the bit when abrasive performance diminishes.