Nicholson 37228 Swiss-pattern Three Square Needle File

Product Description

The NICHOLSON 37228 is a Swiss-pattern needle file designed for precision filing work in metal, toolmaking, and fine mechanical applications. This three-square (triangular cross-section) file measures 4 inches overall length with a 2-inch length of cut and carries a Cut 2 rating, indicating a smooth to second-cut finish suited for refining surfaces and fitting close-tolerance parts. The tang end accepts a standard file handle. It is used primarily by machinists, toolmakers, and trade professionals who require controlled material removal in confined areas or on hard materials.

Swiss-pattern needle files are a standard tool in precision metalworking, instrument repair, and toolroom environments. The triangular profile of the 37228 makes it well suited for filing interior angles, V-grooves, notches, and three-sided openings where a flat or round file cannot reach. At 4 inches overall length, it is a compact tool appropriate for detail work on small parts, dies, molds, and precision assemblies. The Cut 2 designation delivers a balance between stock removal and surface finish.

Key Features

• Triangular (three-square) cross-section for filing interior angles and V-grooves
• Cut 2 rating for controlled stock removal with a refined surface finish
• 4-inch overall length with a 2-inch working cut length for compact reach
• Needle-file precision level suited for fine, close-tolerance fitting work
• Tang end compatible with standard file handles (handle not included)
• 0.11-inch width and 0.11-inch thickness for work in tight spaces

Compatibility

Designed as an OEM-style Swiss-pattern needle file for use with standard tang-style file handles in general precision metalworking and toolroom applications.

Installation Notes

A licensed machinist or experienced tradesperson should seat a properly sized handle onto the tang before use to prevent hand injury from the exposed tang end. Always wear appropriate eye protection when filing metal. File in one direction with controlled strokes; avoid rocking the file across the workpiece to maintain accurate geometry. Clean the file teeth regularly with a file card to prevent pinning and maintain cutting efficiency.