Nicholson T37821 Swiss Pattern Half Round File Cut 4

Product Description

The NICHOLSON T37821 is a Swiss-pattern half round needle file designed for precision metal finishing and deburring work. With an overall length of 6-1/4 inches and a length of cut of 3 inches, it delivers fine material removal in tight areas where standard files cannot reach. The Cut 4 designation places this file in the smooth-cut range, making it appropriate for finishing passes on hardened steel, non-ferrous metals, and similar materials. The half round profile gives the technician two working surfaces in a single tool: a flat face for flat or convex work and a curved face for concave surfaces, slots, and bores. The tang end accepts a compatible file handle, sold separately.

This needle file is suited for tool and die work, instrument repair, mold finishing, and any precision fabrication task requiring close-tolerance material removal. The fine Cut 4 Swiss-pattern tooth geometry produces a smooth surface finish with minimal scoring. Machinists, maintenance technicians, and precision metalworkers will find this file useful for cleaning up drilled holes, fitting keyways, and refining mating surfaces on components requiring tight tolerances.

Key Features

• Swiss-pattern Cut 4 tooth geometry for fine, controlled material removal
• Half round profile provides a flat face and a curved face in one tool
• 3-inch length of cut concentrated toward the tip for access in confined areas
• Needle-file classification for precision detail work
• Tang end designed for use with a standard file handle
• 0.22-inch width keeps the tool narrow for work in slots and small openings

Compatibility

Designed as a standard Swiss-pattern needle file for use with compatible tang-style file handles in precision metalworking and maintenance applications.

Installation Notes

Always fit a handle onto the tang before use to prevent hand injury from the exposed point. Secure the workpiece in a vise or fixture to maintain control during filing strokes. Apply consistent, moderate pressure on the forward stroke only and lift the file on the return stroke to preserve tooth life. Keep the file clean of metal particles using a file card or brush to maintain cutting efficiency.