Starrett 50638 Radius Gage 9/32 Inch Convex Concave

Product Description

The STARRETT 50638 is a single-leaf radius gage used to measure and verify both convex and concave radii on machined parts, castings, and fabricated components. The leaf is stamped to a precise 9/32-inch (0.28 inch maximum) radius profile and finished in satin chrome over stainless steel for corrosion resistance and long-term dimensional stability. Machinists, toolmakers, and precision fabricators use this gage to confirm fillet and corner radii during inspection, fitting, and layout work. The thin, rigid leaf allows access to tight inside and outside radius features without disturbing the workpiece surface.

This gage is suited for use in machine shops, fabrication facilities, and maintenance environments where radius verification is part of a standard inspection routine. It is commonly used on metal workpieces to check radii on turned parts, welded joints, sheet metal bends, and tooling profiles. The single-leaf format makes it a compact addition to a gage set or tool kit where individual radius leaves are needed to supplement an existing range.

Key Features

• Measures both convex and concave radii with a single leaf
• Precision-formed to a 9/32-inch radius (0.28 inches)
• Stainless steel construction resists corrosion and maintains dimensional accuracy
• Satin chrome finish reduces glare and surface reflection during inspection
• Lightweight at 0.05 pounds for easy handling and portability

Compatibility

Designed as a single-leaf radius gage suitable for general-purpose radius inspection on machined, fabricated, and cast metal components requiring a 9/32-inch radius check.

Installation Notes

No installation is required for this inspection tool. Clean the workpiece surface and the gage leaf before use to ensure accurate contact. Store the leaf flat or in a protective case to prevent bending or damage to the formed radius profile. Periodic inspection of the leaf edge for wear or deformation is recommended to maintain measurement accuracy.