{"product_id":"spi-21-531-9-vertical-dial-test-indicator-nist-calibrated","title":"Spi 21-531-9 Vertical Dial Test Indicator Nist Calibrated","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI 21-531-9 is a vertical dial test indicator designed for precision dimensional measurement in machining, inspection, and quality control applications. It covers a measurement range of 0 to 0.06 inches with a dial graduation of 0.0005 inches and a stated accuracy of 0.0012 inches. The jeweled movement reduces friction and wear for consistent, repeatable readings over extended use. A revolution counter and rotating dial allow the technician to track multiple passes without losing position. A short-form certificate of calibration with NIST traceability is included, making this indicator ready for use in documented quality processes without additional calibration steps.\u003c\/p\u003e\u003cp\u003eThis indicator is suited for surface plate work, lathe and mill setup, fixture alignment, and incoming inspection tasks in both production and job-shop environments. The dovetail mount is a standard attachment style compatible with common indicator holders and magnetic-base arms used in machine shop and inspection room setups. The 0-15-0 balanced dial reading simplifies bidirectional measurement. The contact point has a swivel range of 210 degrees, allowing the tip to be positioned in tight clearances or at angles not accessible to a standard plunger-style indicator.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0 to 0.06 inch measurement range with 0.0005 inch graduations for fine-resolution readings\u003c\/li\u003e\n\u003cli\u003eJeweled bearing movement for reduced friction and extended service life\u003c\/li\u003e\n\u003cli\u003e0-15-0 balanced dial with automatic reversal for bidirectional measurement\u003c\/li\u003e\n\u003cli\u003e210-degree contact point swivel angle for access in confined or angled setups\u003c\/li\u003e\n\u003cli\u003eRotating dial and revolution counter for multi-pass tracking\u003c\/li\u003e\n\u003cli\u003eNIST-traceable short-form calibration certificate included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with standard dovetail-style indicator holders, magnetic bases, and articulating arms commonly found in machine shop and inspection room setups.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis indicator is typically mounted and adjusted by machinists, toolmakers, or quality control technicians. Secure the dovetail shank firmly in the holder before zeroing the dial to prevent drift during measurement. Avoid side-loading the contact point beyond its rated swivel range, as this can affect accuracy and damage the jeweled movement. Handle the instrument carefully and store it protected from impact when not in use.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasurement Range\u003c\/strong\u003e: 0 to 0.06 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Graduation\u003c\/strong\u003e: 0.0005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.0012 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Reading\u003c\/strong\u003e: 0-15-0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndicator Style\u003c\/strong\u003e: Vertical\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearing Type\u003c\/strong\u003e: Jeweled\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Diameter\u003c\/strong\u003e: 1-3\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Color\u003c\/strong\u003e: White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount Type\u003c\/strong\u003e: Dovetail\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Point Swivel Angle\u003c\/strong\u003e: 210 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Point Length\u003c\/strong\u003e: 0.86 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall Diameter\u003c\/strong\u003e: 0.079 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRange Per Revolution\u003c\/strong\u003e: 0.06 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibration\u003c\/strong\u003e: Yes, NIST-traceable short-form certificate included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 5 inches x 2.84 inches x 1.78 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.25 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: 21-531-9\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51722174300466,"sku":"21-531-9","price":162.13,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b4e8d5de15658cf1ddc48eb82f101c92.jpg?v=1788586774","url":"https:\/\/voomisupply.com\/products\/spi-21-531-9-vertical-dial-test-indicator-nist-calibrated","provider":"Voomi Supply","version":"1.0","type":"link"}