Tru-maxx 51032282M Square Polishing Stone 320 Grit 4 in

Product Description

The TRU-MAXX 51032282M is a square aluminum oxide polishing stone designed for fine surface finishing and deburring work. At 4 inches in overall length with a 1-inch by 1-inch cross section, this stone is sized for handheld use on flat surfaces, edges, and mating faces. The 320 grit rating places it in the extra fine category, making it suited for final-stage polishing passes where a smooth, refined surface finish is required. It is not oil-filled, so no pre-soaking is needed before use. Machinists, toolmakers, and maintenance technicians reach for this type of stone when cleaning up burrs, lapping surfaces, or refining a finished edge.

This polishing stone is used in machine shops, tool rooms, and general metalworking environments where precise surface conditioning is required. It works on steel, cast iron, hardened tool steel, and non-ferrous metals. Typical applications include deburring machined parts, smoothing weld seams, conditioning mating flanges, and touch-up work on tooling and dies. The square profile allows access to slots, shoulders, and flat surfaces that rounded stones cannot reach cleanly.

Key Features

• 320 grit aluminum oxide abrasive rated Extra Fine for final-stage polishing
• Square profile provides flat contact on surfaces, edges, and slots
• 4 inches overall length suits handheld use and controlled stroke work
• 1 inch by 1 inch cross section for consistent surface contact
• Not oil-filled — ready to use dry or with a light honing oil as preferred
• Weighs 1 pound — solid, stable feel in hand during use

Compatibility

Designed as a general-purpose finishing stone for handheld deburring and polishing of flat metalwork surfaces across machine shop, toolroom, and maintenance applications.

Installation Notes

This stone is a handheld abrasive tool, not a mechanically installed component. Secure the workpiece before use to prevent movement during finishing strokes. Apply light, consistent pressure with even strokes to avoid uneven surface wear on the stone or workpiece. Keep the stone clean of metal debris during use to maintain cutting performance.