Nicholson T37989 Swiss-pattern Equalling File Cut 4

Product Description

The NICHOLSON T37989 is a Swiss-pattern equalling file designed for precision material removal and surface finishing in tight tolerances. With a rectangular cross-section and a Cut 4 needle-grade tooth pattern, this file delivers fine, controlled cutting action suited for deburring, fitting, and finishing work on metal components. The 6.25-inch overall length includes a 3-inch length of cut, making it well-suited for detailed hand-filing tasks. The tang end accepts a standard file handle. At 0.21 inches wide and 0.05 inches thick, the blade profile allows access to narrow slots, keyways, and close-fitting surfaces where larger files cannot reach.

Swiss-pattern files at Cut 4 needle grade are used primarily in tool and die work, instrument fitting, mold finishing, and precision metalworking applications. This equalling file produces flat, parallel surfaces with minimal stock removal per stroke, making it the right choice when final fit and finish matter more than aggressive cutting speed. Machinists, toolmakers, and precision fabricators typically reach for this file during final fitting stages or when working hardened or semi-hardened materials that require a fine tooth profile.

Key Features

• Cut 4 needle-grade Swiss-pattern tooth geometry for fine, precise material removal
• Equalling file shape produces flat, parallel surfaces on both faces
• Rectangular cross-section at 0.21 inches wide and 0.05 inches thick for access to narrow features
• 3-inch length of cut within a 6.25-inch overall length
• Tang end compatible with standard aftermarket file handles
• Suited for deburring, fitting, and finishing on metal workpieces

Compatibility

Designed as an OEM-style replacement or direct-use Swiss-pattern needle file for precision metalworking, tool and die, and instrument fitting applications requiring a Cut 4 equalling profile.

Installation Notes

This file is a hand tool used by machinists, toolmakers, and precision fabricators and requires no power source or installation. Always use a properly fitted handle on the tang before use to prevent hand injury. Secure the workpiece in a vise or appropriate fixture before filing. Inspect the file for cracks or damage before each use and replace if the tooth pattern is worn smooth or loaded with material.