{"product_id":"spi-10-746-6-mechanical-hole-micrometer-4-inches","title":"Spi 10-746-6 Mechanical Hole Micrometer 4 Inches","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 10-746-6 is a mechanical hole micrometer designed for precise internal bore measurement. It features a ratchet stop thimble that delivers consistent measuring pressure, reducing operator-induced error. With a maximum measurement range of 4 inches and an accuracy of 0.00025 inches, this tool is built for dimensional inspection work where tight tolerances matter. The measuring anvils are solid carbide for wear resistance and long service life. It is a three-point contact instrument, which provides self-aligning and self-centering behavior inside the bore, making it well suited for production inspection environments and tool rooms.\u003c\/p\u003e\n\u003cp\u003eThis micrometer is used in precision machining shops, maintenance facilities, and quality control departments where internal diameter measurements must meet close tolerances. It is appropriate for measuring bored holes, cylinder bores, bearing housings, and similar features in both production and maintenance contexts. Licensed machinists, metrologists, and skilled trade technicians handling precision measurement work are the typical users of this instrument.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e4 inches maximum measurement range with 0.0002 inches graduation\u003c\/li\u003e\n  \u003cli\u003eAccuracy of 0.00025 inches for tight-tolerance inspection work\u003c\/li\u003e\n  \u003cli\u003eRatchet stop thimble ensures consistent, repeatable measuring force\u003c\/li\u003e\n  \u003cli\u003eSolid carbide measuring anvils resist wear for extended service life\u003c\/li\u003e\n  \u003cli\u003eThree-point contact design is self-aligning and self-centering in the bore\u003c\/li\u003e\n  \u003cli\u003eMaximum extension rod length of 6 inches for deeper bore access\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a direct-use mechanical hole micrometer for internal bore measurement applications requiring a 4 inches maximum range. No specific OEM replacement compatibility is stated for this instrument.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eHole micrometers are calibrated instruments and should be handled and stored with care to protect the measuring surfaces. Before use, verify the instrument against a known setting ring or calibration standard appropriate to the measurement range. Do not overtighten the thimble beyond the ratchet stop engagement, as this can affect reading accuracy and damage the anvils. Cleaning the measuring faces before each use removes debris that could affect measurement results.\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: 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: 0.00025 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThimble Type\u003c\/strong\u003e: Ratchet Stop\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 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSetting Ring Diameter\u003c\/strong\u003e: 4 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: 2.85 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: 10-746-6\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51691385520434,"sku":"10-746-6","price":417.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4218303707d819c7725406ea614fcfd3.jpg?v=1788284293","url":"https:\/\/voomisupply.com\/products\/spi-10-746-6-mechanical-hole-micrometer-4-inches","provider":"Voomi Supply","version":"1.0","type":"link"}