Spi 14-443-6 Surface Finish Comparator 8 Specimens Nickel

Product Description

The SPI 14-443-6 is a nickel surface finish comparator designed for evaluating machined surface texture across a wide range of finishes. It covers 0.4 to 50 RA micrometers, equivalent to 16 to 2000 AA microinches, making it suitable for verifying both fine and coarse surface conditions produced by cylindrical turning operations. The comparator includes 8 individual specimens and ships with an instruction sheet and a protective carrying case. Machinists, quality control technicians, and inspection personnel use this tool for shop-floor and lab comparisons against workpiece surfaces.

This comparator is intended for use in manufacturing and machining environments where cylindrical turning is the primary material removal process. The 8 specimens represent the following AA microinch values: 16, 32, 63, 125, 250, 500, 1000, and 2000. These increments cover the typical surface finish range called out on engineering drawings for turned components. The comparator is appropriate for both production inspection and incoming quality checks. Overall dimensions are 2.5 inches in length by 5 inches in width, keeping it compact enough for bench or toolbox storage.

Key Features

• 8 nickel specimens spanning 16 to 2000 AA microinches (0.4 to 50 RA micrometers)
• Calibrated for cylindrical turning machining process
• Dual-scale markings: AA microinch and Ra micrometer
• Meets ANSI B46.1-1978, Military Specification 45662, and SAE standards
• Includes instruction sheet and protective carrying case
• Compact overall size: 2.5 inches by 5 inches

Compatibility

Designed for use as a visual and tactile reference comparator for surfaces produced by cylindrical turning; intended for applications governed by ANSI B46.1-1978, Military Specification 45662, and SAE surface finish requirements.

Installation Notes

This is an inspection and measurement tool, not an installed component. Quality technicians and machinists should handle specimens by the edges to avoid contaminating the reference surfaces. Store the comparator in its included case when not in use to protect specimen integrity. Follow the included instructions for proper comparison technique against workpiece surfaces.