{"product_id":"fowler-52-275-001-1-mechanical-inside-micrometer","title":"Fowler 52-275-001-1 Mechanical Inside Micrometer","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe FOWLER 52-275-001-1 is a mechanical inside micrometer designed for precise internal bore and hole measurements. It features a ratchet stop thimble that delivers consistent measuring pressure, reducing operator-to-operator variation. The measuring faces are solid carbide for long-term wear resistance. Graduation is 0.001 inches with an accuracy of 0.0002 inches, meeting Federal Accuracy Specifications. The satin chrome finish reduces glare during use. This instrument is used by machinists, toolmakers, and precision measurement technicians who require reliable inside dimensional verification in shop or field environments.\u003c\/p\u003e\n\u003cp\u003eThe 52-275-001-1 covers a maximum measurement range of 1.2 inches, making it suited for small-bore work including bushings, bores, and cylindrical features in that range. The included setting ring diameter is 0.2 inches, allowing the user to zero and verify the instrument before measurement. This micrometer is a fit for machine shops, quality control departments, and maintenance environments where internal dimensions must be verified to tight tolerances. No digital counter is included, keeping the design straightforward and durable.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eRatchet stop thimble provides repeatable, consistent measuring pressure\u003c\/li\u003e\n  \u003cli\u003eSolid carbide measuring faces resist wear during high-frequency use\u003c\/li\u003e\n  \u003cli\u003e0.001 inch graduation with 0.0002 inch accuracy per Federal Accuracy Specifications\u003c\/li\u003e\n  \u003cli\u003eSatin chrome finish minimizes glare in bright shop lighting\u003c\/li\u003e\n  \u003cli\u003eHardened and ground spindle threads for long-term precision and thread integrity\u003c\/li\u003e\n  \u003cli\u003eIncludes carrying case, setting ring, and spanner wrench for complete out-of-box use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standalone mechanical inside micrometer for internal measurement applications within a 1.2 inch maximum range. No extension rods or additional contact points are included, and the instrument is intended for direct use without supplemental components beyond the included accessories.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis instrument is used by machinists, quality control technicians, and precision tradespeople and requires no installation in the traditional sense. Before first use, verify zero with the included setting ring and adjust using the spanner wrench as needed. Store in the included case when not in use to protect the carbide measuring faces and maintain calibration. Do not force the thimble past its ratchet stop, as overtightening can affect accuracy.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Measurement Range\u003c\/strong\u003e: 1.2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGraduation\u003c\/strong\u003e: 0.001 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy (Inch)\u003c\/strong\u003e: 0.0002 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy (mm)\u003c\/strong\u003e: 0.005 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMicrometer Type\u003c\/strong\u003e: Inside\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThimble Type\u003c\/strong\u003e: Ratchet Stop\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeasuring Face Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Satin Chrome\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSetting Ring Diameter\u003c\/strong\u003e: 0.2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpindle Threads\u003c\/strong\u003e: Hardened and Ground\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Extension Rods\u003c\/strong\u003e: 0\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Setting Rings Included\u003c\/strong\u003e: 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncludes\u003c\/strong\u003e: Case, Setting Ring, Spanner Wrench\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: Federal Accuracy Specifications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: FOWLER\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 52-275-001-1\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"FOWLER","offers":[{"title":"Default Title","offer_id":67912345747762,"sku":"52-275-001-1","price":182.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/66e1f936a4e98a433841e39d1ae42bdf.jpg?v=1791233638","url":"https:\/\/voomisupply.com\/products\/fowler-52-275-001-1-mechanical-inside-micrometer","provider":"Voomi Supply","version":"1.0","type":"link"}