Spi 30-720-7 Radius Gage 1/64 Inch Convex Concave

Product Description

The SPI 30-720-7 is a single-leaf radius gage designed to measure both convex and concave radii at 1/64 inch (0.02 inches maximum radius). Finished in satin chrome over steel, this gage is built for dimensional inspection tasks in fabrication, machining, and maintenance environments. With an accuracy rating of 0.0012 inches, it provides reliable reference measurement for checking fillet radii, corner breaks, and curved profiles on workpieces. Machinists, tool-and-die technicians, and quality control inspectors use this type of gage for quick, repeatable radius verification without the need for optical or electronic instruments.

The 30-720-7 is suited for use in machine shops, fabrication facilities, and maintenance shops wherever radius verification is part of the inspection workflow. It handles both convex and concave profiles from a single leaf, making it a compact and versatile reference tool for checking radiused edges, fillets, and chamfers on metal parts and assemblies.

Key Features

• Measures 1/64 inch radius — covers both convex and concave profiles per leaf
• Accuracy of 0.0012 inches for reliable dimensional reference
• Satin chrome finish on steel construction for durability and corrosion resistance
• Single-leaf configuration for focused, easy-to-handle radius checks
• Lightweight at 0.01 pounds — suitable for bench or field inspection use

Compatibility

Designed as a standard single-leaf radius gage for general dimensional inspection applications involving convex and concave radii measurement in machining and fabrication environments.

Installation Notes

Radius gages require no installation — they are hand-held inspection tools used by machinists and quality technicians. Before use, ensure the workpiece surface is clean and free of burrs or debris that could affect contact and readability. Store the gage in a protective case when not in use to prevent damage to the leaf profile and maintain accuracy over time.