{"product_id":"starrett-67858-mechanical-micrometer-10-in-ratchet-stop","title":"Starrett 67858 Mechanical Micrometer 10 in Ratchet Stop","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe STARRETT 67858 is a mechanical outside micrometer designed for high-precision measurement in demanding shop and field environments. It covers a full 10-inch measurement range with a graduation of 0.0003 inches and a stated accuracy of 0.0003 inches, making it suitable for applications where tight dimensional tolerances are required. The ratchet stop thimble delivers consistent, repeatable measuring pressure, and the solid carbide measuring faces resist wear over extended service life. This instrument is used by machinists, metrologists, and quality-control technicians working with large-diameter workpieces.\u003c\/p\u003e\n\u003cp\u003eThe 67858 is intended for use in precision machining, manufacturing, and inspection environments where large-range outside diameter measurement is required. With a maximum measurement of 10 inches and a gage depth of 4.625 inches, it handles oversized shafts, bores, and components that standard bench micrometers cannot reach. The instrument includes an extension rod with a maximum length of 6 inches, extending its versatility in deep-reach applications. It ships with a case, contacts, a 9-inch setting ring, wrenches, and instructions, giving technicians everything needed for initial setup and calibration verification.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e10-inch measurement range with 0.0003-inch graduation for high-resolution readings\u003c\/li\u003e\n  \u003cli\u003eStated accuracy of 0.0003 inches for reliable dimensional verification\u003c\/li\u003e\n  \u003cli\u003eRatchet stop thimble ensures consistent measuring pressure and repeatable results\u003c\/li\u003e\n  \u003cli\u003eSolid carbide measuring faces for extended wear resistance in production environments\u003c\/li\u003e\n  \u003cli\u003e3-contact-point design with a maximum extension rod length of 6 inches for deep-reach measurement\u003c\/li\u003e\n  \u003cli\u003eIncludes case, contacts, 9-inch setting ring, wrenches, and instructions for complete out-of-box readiness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a large-range outside micrometer for use with workpieces up to 10 inches in outside diameter; intended for professional metrology and precision machining applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eCalibration and verification should be performed by a qualified metrologist or machinist using the included setting ring before placing the instrument into service. Store the micrometer in the provided case when not in use to protect the carbide measuring faces and maintain calibration integrity. Do not overtighten the thimble or apply force beyond the ratchet stop engagement, as this can introduce measurement error or damage the spindle thread.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Measurement Range\u003c\/strong\u003e: 10 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Measurement\u003c\/strong\u003e: 225.00 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGraduation\u003c\/strong\u003e: 0.0003 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.0003 inches\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\u003eGage Depth\u003c\/strong\u003e: 4.625 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Extension Rod Length\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSetting Ring Diameter\u003c\/strong\u003e: 9 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Contact Points\u003c\/strong\u003e: 3\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\u003eDigital Counter\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncludes\u003c\/strong\u003e: Case, Contacts, Instructions, Setting Ring, Wrenches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 51 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: 67858\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51540684865842,"sku":"67858","price":6124.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f738d5268496a5fadb50710546488097_2244e451-754f-4a85-b116-1ab337ea5c11.jpg?v=1785861879","url":"https:\/\/voomisupply.com\/products\/starrett-67858-mechanical-micrometer-10-in-ratchet-stop","provider":"Voomi Supply","version":"1.0","type":"link"}