{"product_id":"spi-cms160713033-mechanical-hole-micrometer","title":"Spi CMS160713033 Mechanical Hole Micrometer","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI CMS160713033 is a mechanical hole micrometer designed for precise internal bore measurement in the range of 0.4250 to 0.5000 inches. It delivers a graduation and accuracy of 0.0001 inches (0.002 mm), making it suitable for tight-tolerance work in machining, manufacturing, and maintenance applications. The ratchet stop thimble provides consistent measuring pressure, and three self-centering carbide contact points ensure repeatable, accurate readings without operator-induced error. A chrome finish resists corrosion and wear during regular shop use. NIST traceability certification is included for quality-system compliance. Machinists, tool-and-die makers, and precision maintenance technicians are the primary users of this instrument.\u003c\/p\u003e\u003cp\u003eThis hole micrometer is applied in situations where accurate internal diameter measurement is required for bores, holes, and cylindrical features in the 0.4250 to 0.5000 inch range. It is well suited for use in precision manufacturing facilities, machine shops, and quality control environments. The included extension rod extends measurement reach up to 4.0000 inches in depth, and the included setting ring (0.5000 inch diameter) allows the instrument to be zeroed before use. The gage depth reaches 2.1100 inches, accommodating a variety of workpiece configurations.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMeasurement range: 0.4250 to 0.5000 inches with 0.0001 inch graduation\u003c\/li\u003e\n\u003cli\u003eAccuracy of 0.0001 inches (0.002 mm) for tight-tolerance inspection\u003c\/li\u003e\n\u003cli\u003eRatchet stop thimble ensures consistent, repeatable measuring force\u003c\/li\u003e\n\u003cli\u003eThree self-centering carbide contact points for stable, accurate internal readings\u003c\/li\u003e\n\u003cli\u003eNIST traceability certification included for quality and calibration records\u003c\/li\u003e\n\u003cli\u003eIncludes one extension rod (up to 4.0000 inches) and one setting ring (0.5000 inch diameter)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a direct-use precision measuring instrument for internal bore and hole measurement applications requiring a range of 0.4250 to 0.5000 inches; compatible with standard metrology workflows that require NIST-traceable calibration documentation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis instrument is used by machinists and quality technicians and does not require permanent installation. Before use, zero the micrometer using the included setting ring on a clean, stable surface. Handle carbide contact points with care to avoid chipping or contamination that could affect accuracy. Store in the provided case when not in use to protect the measuring surfaces and maintain calibration integrity.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurement Range\u003c\/strong\u003e: 0.4250 to 0.5000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGraduation\u003c\/strong\u003e: 0.0001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.0001 inches (0.002 mm)\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\u003eContact Point Material\u003c\/strong\u003e: Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGage Depth\u003c\/strong\u003e: 2.1100 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRod Diameter\u003c\/strong\u003e: 0.4800 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Extension Rod Length\u003c\/strong\u003e: 4.0000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSetting Ring Diameter\u003c\/strong\u003e: 0.5000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Extension Rods Included\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Setting Rings Included\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Chrome\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibrated\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTraceability Certification\u003c\/strong\u003e: NIST\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 8.86 inches L x 6.38 inches W x 2.29 inches H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.8 pounds\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: CMS160713033\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51715540189490,"sku":"CMS160713033","price":415.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f8a795e4f862e081821bbf0b588d6e54.jpg?v=1788515371","url":"https:\/\/voomisupply.com\/products\/spi-cms160713033-mechanical-hole-micrometer","provider":"Voomi Supply","version":"1.0","type":"link"}