{"product_id":"spi-10-745-8-mechanical-hole-micrometer-3-2-to-3-6-in","title":"Spi 10-745-8 Mechanical Hole Micrometer 3.2 to 3.6 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI 10-745-8 is a mechanical hole micrometer designed for precise internal bore measurement in the 3.2000 to 3.6000 inch range. It delivers an accuracy of 0.000250 inches with a graduation of 0.0002 inches, making it suitable for high-tolerance inspection work. The three-point contact design is self-aligning and self-centering, reducing operator error during measurement. Solid carbide measuring anvils resist wear over repeated use. A ratchet stop thimble provides consistent measuring pressure, which is critical for repeatable results. Machinists, quality control technicians, and precision tool specialists are the primary users of this instrument.\u003c\/p\u003e\u003cp\u003eThis micrometer is used for internal diameter measurement of bores, cylinders, and holes where tight tolerances must be verified. With a gage depth of 3.5400 inches and a maximum extension rod length of 6.0000 inches, it accommodates a range of bore depths. The setting ring diameter is 3.6000 inches. It is well suited for shop floor inspection, machine rebuild verification, and incoming quality control in manufacturing and repair environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMeasurement range: 3.2000 to 3.6000 inches\u003c\/li\u003e\n\u003cli\u003eAccuracy of 0.000250 inches with 0.0002 inch graduation\u003c\/li\u003e\n\u003cli\u003eThree-point contact design — self-aligning and self-centering\u003c\/li\u003e\n\u003cli\u003eSolid carbide measuring anvils for extended service life\u003c\/li\u003e\n\u003cli\u003eRatchet stop thimble for consistent, repeatable measuring pressure\u003c\/li\u003e\n\u003cli\u003eGage depth of 3.5400 inches; maximum extension rod length of 6.0000 inches\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a direct-use precision measurement instrument for internal bore inspection across general metalworking, machining, and quality control applications where a 3.2000 to 3.6000 inch measurement range is required.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis instrument requires no installation but should be handled and stored according to standard precision tool practices. Before use, verify calibration against a known standard or setting ring. Clean measuring anvils and bore surfaces before taking measurements to avoid debris-induced errors. Do not expose the micrometer to impact, excessive heat, or corrosive fluids, as these conditions will affect accuracy and longevity.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicrometer Type\u003c\/strong\u003e: Hole\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurement Range\u003c\/strong\u003e: 3.2000 to 3.6000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.000250 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGraduation\u003c\/strong\u003e: 0.0002 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\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: 3.5400 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Extension Rod Length\u003c\/strong\u003e: 6.0000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSetting Ring Diameter\u003c\/strong\u003e: 3.6000 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: 2.8 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 41111601\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: 10-745-8\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51694568112434,"sku":"10-745-8","price":417.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/159b8c2cabe1ec9e2478cc4ad7c19858.jpg?v=1788325584","url":"https:\/\/voomisupply.com\/products\/spi-10-745-8-mechanical-hole-micrometer-3-2-to-3-6-in","provider":"Voomi Supply","version":"1.0","type":"link"}