File (round) Makita D-73748 4 mm – round file 4 mm diameter

Makita D-73748 is a round file with a 4 mm diameter designed for shaping, deburring and smoothing curved surfaces and holes. Compact and precise, it is intended for controlled material removal in metalworking, woodworking and model-making where a small round profile is required. The file’s round cross-section allows access to narrow radii and internal contours that flat or triangular files cannot reach, while its hand-friendly shaft supports accurate manual filing.

Advantages

The 4 mm round profile provides targeted cutting action for internal curves and circular openings without excessive stock removal. Its compact size makes it easy to handle for fine detail work and confined spaces. The file’s uniform tooth pattern ensures consistent surface finish and predictable material removal. Designed by a recognized tool manufacturer, the file is compatible with standard hand filing techniques and offers good durability for small-scale finishing tasks.

Suitable for

• Shaping and enlarging small holes and internal radii
• Deburring and smoothing curved edges on metal and plastic
• Detail work in woodworking and model-making
• Finishing and fit adjustment of round pins, tubes and fittings

Key specifications

• Shape: round cross-section
• Working diameter: 4 mm
• Intended use: manual hand filing for shaping and deburring
• Material suitability: metal, wood, plastic
• Cut pattern: uniform teeth for consistent material removal
• Application area: internal contours, holes, curved surfaces

How to use

Secure the workpiece to prevent movement. Hold the file with a comfortable grip and apply steady, even strokes along the curvature or through the hole, working primarily on the forward cutting stroke if the file is single-cut or as recommended for the file’s tooth pattern. Remove light amounts of material with repeated passes and check fit frequently to avoid over‑filing. Clean the file teeth periodically using a file card or brush to maintain cutting performance.

Usage recommendations

Use appropriate personal protective equipment such as safety glasses and gloves when filing. For best results, match the file shape and size to the workpiece radius and material; when working on hardened metals, use light pressure and frequent inspection to prevent unintended removal. Store the file separately from other tools to protect the teeth.