{"product_id":"starrett-12272-electronic-outside-micrometer-5-inch","title":"Starrett 12272 Electronic Outside Micrometer 5 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe STARRETT 12272 is an electronic outside micrometer designed for high-precision linear measurement in machining, manufacturing, and metrology applications. It delivers a resolution of 0.0001 inches and an accuracy of 0.000150 inches, making it suitable for tight-tolerance inspection work. The measuring faces are micro-lapped carbide, providing hardness and wear resistance for repeated contact with ferrous and non-ferrous workpieces. A friction thimble ensures consistent measuring force across readings. The tool features a black wrinkle and satin chrome finish with a ring-style lock nut and runs on a single included CR2450 battery.\u003c\/p\u003e\n\u003cp\u003eThis micrometer covers a measurement range up to 5 inches (101 mm maximum) with a throat depth of 3.16 inches (80.35 mm), accommodating larger workpiece cross-sections common in heavy machining environments. It is used by machinists, quality control technicians, and tool-and-die professionals in job shops, production floors, and inspection labs. The electronic readout eliminates interpolation error and speeds up repetitive measurement cycles. It is not intended for field or jobsite use where contamination or impact risk is high.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eResolution of 0.0001 inches for fine dimensional inspection\u003c\/li\u003e\n  \u003cli\u003eAccuracy of 0.000150 inches across the full measurement range\u003c\/li\u003e\n  \u003cli\u003eMicro-lapped carbide measuring faces resist wear and maintain flatness\u003c\/li\u003e\n  \u003cli\u003eFriction thimble provides repeatable measuring force\u003c\/li\u003e\n  \u003cli\u003eRing-style lock nut secures the spindle position during reading transfer\u003c\/li\u003e\n  \u003cli\u003eIncludes CR2450 3V battery; no separate purchase required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard outside micrometer for workpieces requiring measurement up to 5 inches (101 mm), compatible with typical bench and fixture setups used in precision machining and inspection workflows.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eCalibration should be verified against a known standard before first use and after any impact or storage. Store the micrometer with the measuring faces slightly apart to prevent thermal contact stress. Battery replacement requires a CR2450 cell; power down the unit before swapping. Handle measuring faces with care — carbide is hard but can chip if dropped on a hard surface.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMicrometer Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Measurement\u003c\/strong\u003e: 5 inches (101 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eResolution\u003c\/strong\u003e: 0.0001 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.000150 inches (0.0040 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeasuring Face Material\u003c\/strong\u003e: Micro-Lapped Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThimble Type\u003c\/strong\u003e: Friction\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLock Nut Type\u003c\/strong\u003e: Ring\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThroat Depth\u003c\/strong\u003e: 3.16 inches (80.35 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black Wrinkle and Satin Chrome\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery\u003c\/strong\u003e: CR2450 3V (included)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRotating Spindle\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 8.6 inches length x 14.8 inches width x 2 inches height\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 3.5 pounds\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: STARRETT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 12272\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51538861588786,"sku":"12272","price":601.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0818f5dd885c205c2330e4b53c04716e.jpg?v=1785828491","url":"https:\/\/voomisupply.com\/products\/starrett-12272-electronic-outside-micrometer-5-inch","provider":"Voomi Supply","version":"1.0","type":"link"}