Tru-maxx 51033363M Square Polishing Stone 320 Grit

Product Description

The TRU-MAXX 51033363M is a square-profile polishing stone made from silicon carbide abrasive, designed for precision surface finishing, deburring, and honing work. At 4 inches in overall length with a 1-inch square cross-section, it delivers consistent contact across flat and rectilinear surfaces. The 320-grit, extra-fine grade removes light tool marks and produces smooth finishes without aggressive stock removal. This stone is not oil-filled, making it suitable for use dry or with a separate honing fluid. Machinists, tool-and-die workers, and maintenance technicians reach for this type of stone when refining mating surfaces, cleaning up valve seats, or finishing precision components.

This polishing stone is suited for bench work and hand-finishing applications in machine shops, maintenance facilities, and field service environments. Its square shape provides flat bearing surfaces ideal for working inside slots, keyways, and rectilinear cavities. The extra-fine 320 grit is appropriate for final finishing passes after coarser stock removal is complete. It can be used on ferrous and non-ferrous metals, hardened steel, and many non-metallic materials where a smooth, refined surface is required.

Key Features

• Silicon carbide abrasive construction for consistent cutting action on hard materials
• 320 grit, extra-fine grade for smooth final finishing and light deburring
• Square profile with 1-inch by 1-inch cross-section for flat-surface and slot work
• 4-inch overall length provides solid hand control during use
• Non-oil-filled — use dry or apply honing oil as needed for the application
• UNSPSC Code 27111908 for procurement and catalog classification

Compatibility

Designed as a general-purpose hand finishing stone suitable for use on hardened steel, tool steel, cast iron, non-ferrous metals, and similar materials requiring extra-fine surface refinement.

Installation Notes

Hand polishing stones require no power tools and are applied manually with light, even pressure along the workpiece surface. Secure the workpiece firmly before use to prevent movement during finishing strokes. Apply a compatible honing oil or cutting fluid if working on hardened ferrous metals to extend stone life and improve surface finish. Inspect the stone periodically for glazing; dress the surface on a flat lapping plate if cutting action degrades.