{"product_id":"starrett-56142-inside-micrometer-set-300-mm-10-rods","title":"Starrett 56142 Inside Micrometer Set 300 Mm 10 Rods","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STARRETT 56142 is a mechanical inside micrometer set designed for precise internal bore and diameter measurements in machining, maintenance, and inspection applications. The set covers a measurement range of 50 mm to 300 mm using ten solid extension rods, each marked with its length for fast identification. A friction thimble provides consistent measuring force to protect accuracy and reduce operator error. Graduation is 0.01 mm with an accuracy of 0.003 mm per 25 mm of range. Anvils are hardened and ground for durability. Extension rods are insulated to minimize thermal transfer from the technician's hands. Quick-reading figures aid efficient measurement in production or field environments.\u003c\/p\u003e\u003cp\u003eThis inside micrometer set is suited for machine shops, industrial maintenance facilities, and quality control departments where accurate internal measurements are required across a wide range of bore sizes. It is appropriate for measuring cylinder bores, housings, sleeves, and similar internal features in both light manufacturing and heavy-duty industrial settings. Machinists, toolmakers, and metrology technicians are the primary users. The included case keeps all components organized and protected when not in use.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMeasurement range of 50 mm to 300 mm using ten solid extension rods\u003c\/li\u003e\n\u003cli\u003e0.01 mm graduation with 0.003 mm accuracy per 25 mm of range\u003c\/li\u003e\n\u003cli\u003eFriction thimble provides repeatable, controlled measuring force\u003c\/li\u003e\n\u003cli\u003eHardened and ground anvils for long-term wear resistance\u003c\/li\u003e\n\u003cli\u003eInsulated rods marked with length for quick selection and reduced thermal error\u003c\/li\u003e\n\u003cli\u003eQuick-reading figures for efficient use in production environments\u003c\/li\u003e\n\u003cli\u003eIncludes protective carrying case for storage and transport\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose inside micrometer set suitable for standard metric internal measurement applications in machining and inspection environments.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInside micrometers are installed and removed by hand without tools. Before use, ensure the measuring faces and extension rod contact points are clean and free of debris. Zero and calibrate the instrument according to the manufacturer procedure before taking critical measurements. Store extension rods in the provided case to prevent damage to contact surfaces.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurement Range\u003c\/strong\u003e: 50 mm to 300 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGraduation\u003c\/strong\u003e: 0.01 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.003 mm per 25 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTravel per Rod\u003c\/strong\u003e: 13 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRod Type\u003c\/strong\u003e: Solid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThimble Type\u003c\/strong\u003e: Friction\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Extension Rods\u003c\/strong\u003e: 10\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital Counter\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes\u003c\/strong\u003e: Case, Measuring Rods\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 56142\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51541049475378,"sku":"56142","price":605.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ce7d132c4936073df7f4cebb5537db53.jpg?v=1785867838","url":"https:\/\/voomisupply.com\/products\/starrett-56142-inside-micrometer-set-300-mm-10-rods","provider":"Voomi Supply","version":"1.0","type":"link"}