Spi 14-451-9 Surface Finish Comparator Nickel 5 Specimens

Product Description

The SPI 14-451-9 is a nickel surface finish comparator designed for comparing and verifying machined surface textures against known reference standards. The set includes five polished specimens covering a range of 0.0125 to 0.2 Ra micrometers, equivalent to 0.5 to 8 AA microinches. Each specimen represents a distinct finish level, giving inspectors and machinists a tactile and visual reference for quality control work on polished surfaces. The comparator is 2.5 inches in overall length and 5 inches in overall width, making it compact enough for bench or field use. Weighing 0.25 pounds, it comes with instructions and a protective case.

This comparator is suited for quality assurance applications in machine shops, manufacturing facilities, and inspection environments where polished surface finishes must be verified against ANSI and military standards. Machinists, quality technicians, and inspection personnel use it to evaluate workpiece surfaces produced by polishing operations. It is appropriate for both production floor checks and incoming inspection workflows where surface texture documentation is required.

Key Features

• Five nickel specimens spanning 0.0125 to 0.2 Ra micrometers (0.5 to 8 AA microinches)
• Dual scale labeling in both Ra micrometers and AA microinches for cross-reference
• Nickel material construction provides durable, corrosion-resistant reference surfaces
• Compact form factor at 2.5 inches length by 5 inches width for easy handling
• Includes instructions and protective carrying case
• Meets ANSI B46.1-1978, Military Specification 45662, and SAE standards

Compatibility

Designed for use as a tactile and visual reference comparator for polished machined surfaces evaluated under AA and Ra surface finish scales per ANSI B46.1-1978 standards.

Installation Notes

No installation is required for this inspection tool. Store specimens in the included case to prevent contamination or surface damage that could affect reference accuracy. Clean reference surfaces with a lint-free cloth before comparison to ensure accurate readings. Handle specimens by the edges to avoid transferring skin oils to the reference surfaces.