{"product_id":"starrett-55946-mechanical-micrometer-head-1-inch","title":"Starrett 55946 Mechanical Micrometer Head 1 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe STARRETT 55946 is a mechanical micrometer head designed for precision measurement in tooling, machining, and instrumentation applications. It provides a 1-inch measurement range with accuracy to 0.0001 inch, making it suitable for tasks that demand fine resolution. The head features a flat spindle measuring 0.235 inches in diameter and 1.25 inches long, a satin chrome finish, and an advanced sleeve design with staggered lines and distinct figures for fast, reliable readings. At 5.5 inches in overall length, this unit suits bench-mounted fixtures, jigs, and custom measuring setups. Machinists, tool and die makers, and metrology technicians are the typical end users.\u003c\/p\u003e\n\u003cp\u003eThis micrometer head is used in precision machining environments where a standalone measuring head must be integrated into a fixture, machine slide, or custom gauge assembly. The 0.4999-inch diameter stem is 0.75 inches long and fits standard micrometer head mounting bores. A 5\/8-inch ratchet stop thimble is included, providing consistent measuring force and repeatable readings across multiple measurements. The part ships as a single unit with a minimum order quantity of one.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1-inch measurement range with 0.0001-inch accuracy for high-resolution work\u003c\/li\u003e\n  \u003cli\u003e5\/8-inch ratchet stop thimble for consistent, repeatable measuring force\u003c\/li\u003e\n  \u003cli\u003eFlat spindle, 0.235 inches in diameter and 1.25 inches long\u003c\/li\u003e\n  \u003cli\u003eAdvanced sleeve design with staggered lines and distinct quick-reading figures\u003c\/li\u003e\n  \u003cli\u003eSatin chrome finish for corrosion resistance and low-glare readability\u003c\/li\u003e\n  \u003cli\u003eSteel measuring face for durability under repeated contact\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style mechanical micrometer head for integration into precision fixtures, jigs, machine slides, and custom gauge assemblies that accept a 0.4999-inch diameter stem.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or metrology technicians. The stem is pressed or secured into a matching bore on the receiving fixture using appropriate clamping hardware. Ensure the mounting surface is clean and free of debris before seating the stem. Do not apply lateral force to the spindle during installation, as this can affect accuracy and spindle alignment.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeasurement Range\u003c\/strong\u003e: 0 to 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.0001 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpindle Shape\u003c\/strong\u003e: Flat\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpindle Diameter\u003c\/strong\u003e: 0.235 inches (5.97 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSpindle Length\u003c\/strong\u003e: 1.25 inches (31.75 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThimble Diameter\u003c\/strong\u003e: 0.625 inches (15.88 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStem Diameter\u003c\/strong\u003e: 0.4999 inches (12.70 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStem Length\u003c\/strong\u003e: 0.75 inches (19.05 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Satin Chrome\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMeasuring Face Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.3 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: 55946\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51541527068978,"sku":"55946","price":354.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/22d0d0ddb04d0f7032ebd6e1079365ac.jpg?v=1785878395","url":"https:\/\/voomisupply.com\/products\/starrett-55946-mechanical-micrometer-head-1-inch","provider":"Voomi Supply","version":"1.0","type":"link"}