{"product_id":"spi-14-448-5-surface-finish-comparator-6-specimens-nickel","title":"Spi 14-448-5 Surface Finish Comparator 6 Specimens Nickel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI 14-448-5 is a nickel surface finish comparator used to visually and tactilely compare machined surface finishes against known reference specimens. It contains six belt-sanding specimens spanning a range of 0.1 to 3.2 Ra micrometers, which corresponds to 4, 8, 16, 32, 63, and 125 AA microinches. The comparator measures 2.5 inches in length by 5 inches in width overall and weighs 0.25 pounds. Machinists, quality control technicians, and metrology professionals use this tool to verify surface finish requirements on production and inspection floors without the need for electronic instrumentation.\u003c\/p\u003e\u003cp\u003eThis comparator is suited for evaluating belt-sanded surfaces in manufacturing, fabrication, and quality assurance environments. The nickel specimens provide durable, corrosion-resistant references that closely replicate actual machined surfaces. Both Ra and AA scale readings are marked on the comparator, making it compatible with shops referencing either unit system. The included storage case protects the specimens from contamination and physical damage between uses, maintaining reference accuracy over time.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSix nickel specimens covering 4, 8, 16, 32, 63, and 125 AA microinch (0.1 to 3.2 Ra micrometer) finishes\u003c\/li\u003e\n\u003cli\u003eDual-scale markings in both Ra (micrometer) and AA (microinch) for cross-reference compatibility\u003c\/li\u003e\n\u003cli\u003eBelt sanding machining process specimens for accurate process-specific comparison\u003c\/li\u003e\n\u003cli\u003eNickel material construction provides corrosion resistance and long specimen life\u003c\/li\u003e\n\u003cli\u003eCompact at 2.5 inches by 5 inches overall, sized for bench or field use\u003c\/li\u003e\n\u003cli\u003eIncludes instructions and protective storage case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with belt-sanded surface finish evaluation per ANSI B46.1-1978, Military Specification 45662, and SAE standards. Suitable for any inspection workflow referencing AA or Ra surface finish scales in those standards.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eNo installation is required. This is a hand-held reference tool used by quality technicians and machinists during inspection. Keep specimens clean and free of oils, chips, or abrasives that could alter the reference surface. Store in the included case when not in use to prevent specimen damage or contamination.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Surface Finish\u003c\/strong\u003e: 4 AA microinches (0.1 Ra micrometers)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Surface Finish\u003c\/strong\u003e: 125 AA microinches (3.2 Ra micrometers)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Specimens\u003c\/strong\u003e: 6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMachining Process\u003c\/strong\u003e: Belt Sanding\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eScale Type\u003c\/strong\u003e: AA and Ra\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\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: 14-448-5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51716272193842,"sku":"14-448-5","price":111.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/13764ffe474d2739acf4ca5e229ab1ff.jpg?v=1788523780","url":"https:\/\/voomisupply.com\/products\/spi-14-448-5-surface-finish-comparator-6-specimens-nickel","provider":"Voomi Supply","version":"1.0","type":"link"}