Tru-maxx 51031599M Rectangle Polishing Stone 400 Grit

Product Description

The TRU-MAXX 51031599M is a rectangular aluminum oxide polishing stone designed for fine surface finishing and deburring work on metal and other hard materials. Running at 400 grit in a super fine grade, this oil-filled stone removes light scratches, refines edges, and prepares surfaces for final finishing. At 6 inches in overall length, it provides a comfortable working surface for hand-controlled lapping, honing, and detail polishing tasks. Machinists, tool-and-die technicians, and maintenance mechanics reach for stones like this when a file leaves too coarse a finish and a polishing compound alone is not enough to control material removal.

This polishing stone is suited for bench work and field use wherever a controlled, consistent abrasive surface is needed. Typical applications include deburring machined parts, smoothing valve seats and mating surfaces, touching up worn tooling, and refining weld seams before final inspection. The oil-filled construction keeps the stone from loading up quickly during use, making it practical for sustained work sessions without constant cleaning.

Key Features

• 400 grit super fine grade for light material removal and surface refinement
• Aluminum oxide abrasive provides consistent cutting action on ferrous and non-ferrous metals
• Oil-filled construction resists loading and extends usable stone life
• 6-inch overall length offers adequate working surface for hand honing and lapping
• Rectangular shape allows flat-surface contact for uniform finishing
• Weighs 1 pound — solid enough for controlled hand pressure without fatigue

Compatibility

Designed as a general-purpose hand polishing stone for bench and field use on metal surfaces where super fine abrasive action is required.

Installation Notes

No power tools or mechanical fixtures are required for standard hand use. Secure the workpiece in a vise or on a stable bench surface before applying the stone. Apply a light film of honing oil to the stone face before and during use to prevent loading and extend stone life. Clean the stone with solvent or mineral spirits after each use to remove swarf and embedded particles.