Router Bit Bosch FREZ MINI FI 3.2 mm shank, 4.8 mm cutting diameter — for glazing

Bosch FREZ MINI FI router bit with a 3.2 mm shank and 4.8 mm cutting diameter is designed for glazing work that requires compact, precise cutting. The carbide cutter is shaped for narrow grooves and accurate edge finishing on glazing beads, seals and frame profiles. It is suitable for use in rotary tools and small routers that accept a 3.2 mm shank and is intended for trimming, slotting and finishing components used in glass frame assemblies.

Advantages

The mini router bit features a carbide cutting head that provides durability and consistent performance when working with soft and medium-hard materials used in glazing frames. Its small diameter and slim shank allow access to tight profiles and narrow grooves while maintaining dimensional accuracy. The tool delivers clean cuts and reduced chipping on trims and seals, helping to achieve uniform joints and a professional fit in glazing applications.

Suitable for

• Precision grooving of glazing beads and narrow profiles
• Trimming and finishing of seals and gaskets in window and door frames
• Slotting for small frame components and profile adjustments

Key specifications

• Shank diameter: 3.2 mm
• Cutting diameter: 4.8 mm
• Carbide cutting head for wear resistance
• Compact design for access to narrow profiles and grooves

How to use

Install the Bosch mini router bit into a compatible rotary tool or small router collet designed for a 3.2 mm shank, ensuring the bit is securely clamped. Set an appropriate rotation speed for the material being worked—moderate speeds for soft timber and lower speeds for brittle or laminated materials—to avoid tearing or chipping. Make multiple shallow passes rather than a single deep cut to maintain accuracy and reduce tool load. Keep the workpiece steady and use guides or fences when required to ensure straight, uniform cuts.

Usage recommendations

For best results, use the bit for light-duty trimming and finishing in glazing tasks; avoid heavy stock removal. Regularly inspect the carbide edge for wear and replace the bit when cutting quality degrades. Use appropriate personal protective equipment and follow safety instructions for the rotary tool in use.