Tru-maxx 51032258M Square Polishing Stone 220 Grit 4 Inches

Product Description

The TRU-MAXX 51032258M is a square aluminum oxide polishing stone designed for precision hand-lapping, deburring, and surface finishing tasks in machine shops, maintenance facilities, and toolroom environments. At 4 inches in overall length with a 1-inch by 1-inch cross section, this stone delivers consistent contact across flat and broad work surfaces. The 220 grit, very fine grade makes it suitable for final-stage finishing passes where surface smoothness and dimensional accuracy matter. It is not oil-filled, so it is used dry or with a light honing oil applied by the technician. Machinists, tool-and-die workers, and maintenance mechanics are the primary users.

This polishing stone fits standard hand-lapping and finishing applications on ferrous and non-ferrous metals, mold surfaces, tooling, and machined components. The square profile allows uniform pressure distribution across a flat work surface and provides four working edges for edge-breaking and fine burr removal. It is well suited for bench work and in-place surface conditioning where a power tool would be impractical or too aggressive.

Key Features

• 220 grit, very fine grade aluminum oxide abrasive for final-stage surface finishing
• Square cross section — 1 inch by 1 inch — for full-face contact on flat surfaces
• 4 inches overall length for comfortable hand grip and extended reach
• Not oil-filled — use dry or apply honing oil as needed for the application
• Four working edges suitable for deburring, edge-breaking, and corner finishing

Compatibility

Designed as an OEM-style replacement or standard bench stone for hand-lapping and finishing applications on machined metal surfaces across general manufacturing and maintenance environments.

Installation Notes

Polishing stones are applied by hand by machinists or maintenance technicians — no power tools required. Secure the workpiece before applying the stone to prevent movement during finishing passes. When using with honing oil, apply a small amount to the stone surface to reduce loading and improve cutting action. Inspect the stone periodically for glazing; a loaded or glazed surface reduces cutting efficiency and should be dressed or replaced.