{"product_id":"spi-10-742-5-mechanical-hole-micrometer-2-4-inch","title":"Spi 10-742-5 Mechanical Hole Micrometer 2.4 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 10-742-5 is a mechanical hole micrometer designed for precision internal bore measurement. It features a ratchet stop thimble that delivers consistent measuring pressure, solid carbide measuring anvils for long-term wear resistance, and a self-aligning, self-centering three-contact-point design that seats accurately inside bores without manual adjustment. The instrument reads to a graduation of 0.0002 inches with an accuracy of 0.000250 inches, making it suitable for demanding dimensional inspection work in machine shops, maintenance facilities, and manufacturing environments. It is used by machinists, metrology technicians, and precision maintenance professionals.\u003c\/p\u003e\n\u003cp\u003eThis hole micrometer covers a maximum measurement range of 2.4 inches, with a gage depth of 3.54 inches and a maximum extension rod length of 6.0 inches. The setting ring diameter is 2.0 inches. It is well-suited for inspecting bores, cylinders, and internal diameters in production machining, engine rebuilding, pump service, and similar precision measurement applications where analog readout is preferred over digital instrumentation.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eRatchet stop thimble ensures repeatable, consistent measuring pressure across readings\u003c\/li\u003e\n  \u003cli\u003eSolid carbide measuring anvils resist wear on hardened and abrasive workpiece surfaces\u003c\/li\u003e\n  \u003cli\u003eSelf-aligning and self-centering three-contact-point design seats accurately in bores\u003c\/li\u003e\n  \u003cli\u003e0.0002 inch graduation with 0.000250 inch accuracy for high-precision dimensional work\u003c\/li\u003e\n  \u003cli\u003eMaximum extension rod length of 6.0 inches extends reach into deep bores\u003c\/li\u003e\n  \u003cli\u003eNo digital counter — direct analog thimble reading for straightforward interpretation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style mechanical hole micrometer suitable for general internal bore measurement applications across machine shop, maintenance, and manufacturing environments where a 2.4 inch maximum range instrument is required.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis instrument is used by machinists and metrology technicians and requires no installation in the traditional sense. Before use, zero the micrometer against the included or separately sourced setting ring to verify calibration. Handle carbide anvils carefully to avoid chipping against hard surfaces. Store in a protective case away from temperature extremes to maintain measurement accuracy.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMicrometer Type\u003c\/strong\u003e: Hole\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Measurement Range\u003c\/strong\u003e: 2.4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGraduation\u003c\/strong\u003e: 0.0002 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.000250 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThimble Type\u003c\/strong\u003e: Ratchet Stop\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRod Type\u003c\/strong\u003e: Ratchet\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Contact Points\u003c\/strong\u003e: 3\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: 3.54 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Extension Rod Length\u003c\/strong\u003e: 6.0 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSetting Ring Diameter\u003c\/strong\u003e: 2.0 inches\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: 2.7 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: SPI\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 10-742-5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51696512368946,"sku":"10-742-5","price":416.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f7e82b30540f6e90b173c8c76260a927.jpg?v=1788343414","url":"https:\/\/voomisupply.com\/products\/spi-10-742-5-mechanical-hole-micrometer-2-4-inch","provider":"Voomi Supply","version":"1.0","type":"link"}