Value Collection 4256405 Square Polishing Stone 400 Grit

Product Description

The VALUE COLLECTION 4256405 is a square aluminum oxide polishing stone designed for fine surface finishing and deburring on metal, ceramic, and composite workpieces. Measuring 0.5 inches wide by 0.5 inches thick with a 6-inch overall length, this stone delivers consistent material removal at 400 grit, classified as super fine. Aluminum oxide is a hard, durable abrasive well-suited to ferrous metals and general-purpose honing applications. The stone is not oil-filled, so it can be used dry or with a light honing oil depending on the application. Machinists, toolmakers, and finishing technicians reach for this profile when tight tolerances or smooth surface finishes are required.

This polishing stone is suited for bench work, hand stoning flat or prismatic surfaces, and cleaning up machined edges on production or repair parts. The square cross-section provides a stable contact face for work on slots, keyways, flat surfaces, and external edges. At 400 grit super fine, it is typically used in the later stages of a finishing sequence after coarser stock removal has been completed. The 6-inch length gives adequate hand clearance for controlled strokes on most workpiece geometries.

Key Features

• 400 grit super fine aluminum oxide abrasive for late-stage finishing and polishing
• Square profile with 0.5-inch width and 0.5-inch thickness suits slots, keyways, and flat surfaces
• 6-inch overall length provides comfortable hand control during bench stoning
• Not oil-filled — compatible with dry use or application of external honing oil
• Sold in a package quantity of 6 stones per order

Compatibility

Designed as a general-purpose hand polishing stone for bench finishing operations on metal, ceramic, and composite surfaces where a 0.5 inch by 0.5 inch square profile and 400 grit super fine cut are specified.

Installation Notes

Hand polishing stones do not require power tools or mechanical fastening. Secure the workpiece in a vise or fixture before stoning to prevent movement and maintain consistent contact. Apply a light honing oil to the stone face if surface loading is observed during dry use. Inspect the stone face periodically for glazing and dress or replace as needed to maintain cutting efficiency.