{"product_id":"spi-14-451-9-surface-finish-comparator-nickel-5-specimens","title":"Spi 14-451-9 Surface Finish Comparator Nickel 5 Specimens","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe 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.\u003c\/p\u003e\u003cp\u003eThis 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.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFive nickel specimens spanning 0.0125 to 0.2 Ra micrometers (0.5 to 8 AA microinches)\u003c\/li\u003e\n\u003cli\u003eDual scale labeling in both Ra micrometers and AA microinches for cross-reference\u003c\/li\u003e\n\u003cli\u003eNickel material construction provides durable, corrosion-resistant reference surfaces\u003c\/li\u003e\n\u003cli\u003eCompact form factor at 2.5 inches length by 5 inches width for easy handling\u003c\/li\u003e\n\u003cli\u003eIncludes instructions and protective carrying case\u003c\/li\u003e\n\u003cli\u003eMeets ANSI B46.1-1978, Military Specification 45662, and SAE standards\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned 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.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eNo 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.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Surface Finish\u003c\/strong\u003e: 0.0125 Ra micrometers (0.5 AA microinches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Surface Finish\u003c\/strong\u003e: 0.2 Ra micrometers (8 AA microinches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Specimens\u003c\/strong\u003e: 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecimen Values\u003c\/strong\u003e: 0.5, 1, 2, 4, and 8 AA microinches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScale Type\u003c\/strong\u003e: AA and Ra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachining Process\u003c\/strong\u003e: Polishing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Nickel\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\u003eStandards\u003c\/strong\u003e: ANSI B46.1-1978, Military Specification 45662, SAE\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: 14-451-9\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51697439146290,"sku":"14-451-9","price":111.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/9dbee8554befb86fb29bd2d5e7e5d57f.jpg?v=1788351658","url":"https:\/\/voomisupply.com\/products\/spi-14-451-9-surface-finish-comparator-nickel-5-specimens","provider":"Voomi Supply","version":"1.0","type":"link"}