Rotary Tool Bit Dremel 7144

The Dremel 7144 rotary tool bit is a diamond-coated accessory designed for fine detail work, cutting, engraving, carving, touch-up and finishing on hard materials. It has a shank diameter of 3.2 mm, an overall length of 46 mm and a working diameter of 2.4 mm. The pack contains 2 pieces and the bit supports rotary speeds up to 25,000 RPM, making it suitable for precision tasks in crafting and DIY projects.

Advantages

Diamond particles on the bit surface provide durable cutting and consistent performance on hard materials. The small 2.4 mm diameter and 3.2 mm shank allow precise access to tight areas. A maximum speed of 25,000 RPM enables effective material removal and fine detailing. Supplied as a two-piece pack for convenience and replacement.

Suitable for

• Fine detail engraving and carving on wood and semi-precious stones
• Cutting and shaping ceramic, glass and jade
• Finishing and touch-up on hardened steel and other hard materials
• Precision work in crafting, model making and jewellery repair

Key specifications

• Brand: Dremel
• Model / MPN: 26157144JA (7144)
• EAN: 8710364044870
• Shank diameter: 3.2 mm
• Bit diameter: 2.4 mm
• Length: 46 mm
• Maximum rotational speed: 25,000 RPM
• Pack quantity: 2 pieces

How to use

Install the Dremel 7144 bit into a compatible rotary tool collet sized for a 3.2 mm shank, tighten securely and set the tool speed according to the material: use lower speeds for delicate materials and higher speeds (up to 25,000 RPM) for harder substances. Apply light, steady pressure and keep the bit moving to avoid excessive heat or gouging. Use appropriate clamps and personal protective equipment (safety glasses, dust mask) when cutting or grinding.

Usage recommendations

For best results, test the bit on a scrap piece of the same material to determine optimal speed and pressure. Replace the bit if diamond coating becomes worn to maintain cutting efficiency and avoid damaging the workpiece.