Spi 30-688-6 Radius Gage Set Stainless Steel 26 Piece

Product Description

The SPI 30-688-6 is a 26-piece radius gage set designed for measuring concave and convex radii on machined parts, castings, and fabricated components. Each blade is precision-ground from stainless steel with a satin chrome finish and carries an accuracy of 0.0012 inches. The set covers a range from 0.01 to 0.5 inches across 26 individual radius sizes, giving machinists, tool-and-die makers, and quality-control technicians a wide spread of common and fine-increment measurements in a single compact package.

This set is suited for use in machine shops, fabrication facilities, and inspection environments where verifying fillet radii, corner breaks, and profile blends is part of the workflow. The graduated blade selection covers both fine increments at the small end and broader steps at the larger end of the range, making the set practical for checking tooling, molds, dies, and finished workpiece geometry. A included holder keeps blades organized during use, and the vinyl case protects the set during storage and transport.

Key Features

• 26 stainless steel blades covering 0.01 to 0.5 inch radii
• Accuracy of 0.0012 inches per blade
• Satin chrome finish resists corrosion and reduces glare during inspection
• Blade holder included for organized access during measurement
• Vinyl storage case included for protection and portability
• Full radius listing spans both fine and coarse increments across the range

Compatibility

Designed as a general-purpose radius gage set for use with machined metal, plastic, and composite workpieces where concave or convex radius verification is required.

Installation Notes

Radius gages require no installation and are a hand-held inspection tool. Select the blade that most closely fits the profile being checked and verify full contact along the blade edge against the workpiece. Keep blades clean and free of chips or burrs that could affect seating. Store in the provided vinyl case to prevent damage to the precision-ground edges.