Grobet 31.630 Swiss Pattern Needle File 4 in Three Square

Product Description

The GROBET 31.630 is a Swiss-pattern needle file in a three-square (triangular) configuration, designed for precision material removal in tight spaces and angled surfaces. Cut 0 indicates a coarse tooth pattern, making it effective for fast stock removal on metals, plastics, and similar materials. With a 4-inch overall length and a 1.75-inch length of cut, this file is sized for detail work that standard hand files cannot reach. The tang end accepts a separate handle, allowing the technician to choose a grip suited to the application. Machinists, toolmakers, jewelers, and precision trade workers are the primary users.

This needle file is suited for deburring, fitting, and shaping tasks in both shop and field environments. The three-square cross-section produces flat sides with sharp 60-degree corners, making it particularly effective for filing internal angles, keyways, grooves, and notches. Cut 0 coarseness is appropriate for initial material removal before progressing to finer cuts. The compact 4-inch overall length makes it practical for use inside housings, enclosures, and confined component assemblies.

Key Features

• Three-square (triangular) cross-section with 60-degree corners for filing internal angles and grooves
• Cut 0 coarse tooth pattern for efficient stock removal
• 1.75-inch length of cut concentrates the working surface on the file body
• 0.11-inch width suits fine detail and precision work
• Tang end accepts a standard needle file handle (sold separately)
• Swiss-pattern construction for consistent tooth geometry and cut quality

Compatibility

Designed as an OEM-style Swiss-pattern needle file for use with standard tang-style needle file handles in precision machining, toolmaking, and detail fabrication applications.

Installation Notes

Needle files with a tang end require a properly fitted handle before use to prevent hand injury from the exposed tang. Always secure the workpiece in a vise or fixture before filing. Inspect the file for cracks or broken teeth before each use and replace if damaged. Wear appropriate eye protection when filing metal to guard against chip and particle ejection.