{"product_id":"spi-14-446-9-surface-finish-comparator-8-specimens-nickel","title":"Spi 14-446-9 Surface Finish Comparator 8 Specimens Nickel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI 14-446-9 is a nickel surface finish comparator designed for hands-on measurement and verification of machined surface textures. It contains 8 individual specimens covering a range of 0.4 to 50 Ra micrometers, equivalent to 16 to 2000 AA microinches. Each specimen represents a standardized horizontal milling finish, allowing machinists, quality inspectors, and tooling engineers to make direct tactile and visual comparisons against a workpiece. The comparator measures 2.5 inches in length by 5 inches in width and weighs approximately 0.25 pounds. It ships complete with a protective case and printed instructions.\u003c\/p\u003e\u003cp\u003eThis comparator is used in machine shops, manufacturing floors, and quality control environments where surface finish must be verified against engineering drawings or contractual specifications. It is suited for incoming inspection, in-process checks, and final part acceptance. The horizontal milling specimen set makes it particularly relevant for milled components produced on knee mills, bed mills, and CNC machining centers. Quality engineers, CMM technicians, and shop floor inspectors are the primary users.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e8 nickel specimens spanning 16 to 2000 AA microinches (0.4 to 50 Ra micrometers)\u003c\/li\u003e\n\u003cli\u003eHorizontal milling machining process represented across all specimens\u003c\/li\u003e\n\u003cli\u003eDual scale markings in both Ra micrometers and AA microinches for international use\u003c\/li\u003e\n\u003cli\u003eMeets ANSI B46.1-1978, Military Specification 45662, and SAE standards\u003c\/li\u003e\n\u003cli\u003eIncludes protective carrying case and instructions\u003c\/li\u003e\n\u003cli\u003eCompact form factor at 2.5 inches by 5 inches for bench or field use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in surface finish verification workflows referencing ANSI B46.1-1978, Military Specification 45662, and SAE standards. Applicable to any horizontal milling application requiring visual and tactile surface texture comparison across the 16 to 2000 AA microinch range.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eNo installation is required. Handle specimens with care to avoid contaminating the reference surfaces with oils, debris, or abrasives that could alter tactile readings. Store the comparator in its included case when not in use to preserve specimen integrity. Calibration against a certified surface finish standard is recommended periodically per your facility quality program.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Nickel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Surface Finish\u003c\/strong\u003e: 16 AA microinches (0.4 Ra micrometers)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Surface Finish\u003c\/strong\u003e: 2000 AA microinches (50 Ra micrometers)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Specimens\u003c\/strong\u003e: 8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachining Process\u003c\/strong\u003e: Horizontal Milling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScale Type\u003c\/strong\u003e: AA and Ra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Width\u003c\/strong\u003e: 5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.25 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes Case\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI B46.1-1978, Military Specification 45662, SAE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 41114508\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SPI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 14-446-9\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51701533868338,"sku":"14-446-9","price":111.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/bde05efa79dd97dc9ac9eee3cb9ce06f.jpg?v=1788400809","url":"https:\/\/voomisupply.com\/products\/spi-14-446-9-surface-finish-comparator-8-specimens-nickel","provider":"Voomi Supply","version":"1.0","type":"link"}