{"product_id":"spi-21-378-5-dial-test-indicator-0-03-in-horizontal","title":"Spi 21-378-5 Dial Test Indicator 0.03 in Horizontal","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI 21-378-5 is a horizontal-style dial test indicator designed for precise surface and feature measurement in machine shop, metrology, and quality control environments. It measures up to 0.03 inches of travel with a graduation of 0.0005 inches, giving technicians and machinists resolution suitable for tight-tolerance inspection work. The fully jeweled movement reduces friction for repeatable, accurate readings, and the satin chrome finish resists corrosion in shop environments. The 1.25-inch white dial face provides clear contrast for reading, and the 0-15-0 bidirectional scale allows deflection measurement in either direction from zero. Licensed metrology professionals and precision machinists are the primary users.\u003c\/p\u003e\u003cp\u003eThis indicator is suited for use on surface plates, height gages, and machine tool setups where a low-profile horizontal indicator is required. The dovetail mount and included 5\/32-inch and 3\/8-inch dovetail extensions provide universal positioning capability, making it adaptable to a wide range of fixture and arm configurations. The kit ships complete with two contact points, a universal clamp, a height gage bar, and a fitted case for storage and transport. NIST-traceable calibration is included, which satisfies most quality system and inspection record requirements.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFully jeweled movement for low-friction, repeatable measurement\u003c\/li\u003e\n\u003cli\u003e0.0005 inch graduation with 0.03 inch total range per revolution\u003c\/li\u003e\n\u003cli\u003e0-15-0 bidirectional dial scale reads deflection in both directions\u003c\/li\u003e\n\u003cli\u003eDovetail mount with universal positioning capability\u003c\/li\u003e\n\u003cli\u003eSatin chrome finish for corrosion resistance in shop use\u003c\/li\u003e\n\u003cli\u003eNIST-traceable short-form certificate of calibration included\u003c\/li\u003e\n\u003cli\u003eComplete kit includes contact points, extensions, clamp, height gage bar, and fitted case\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with standard 5\/32-inch and 3\/8-inch dovetail indicator holders, arms, and height gage attachments common in precision measurement and machine shop applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eMount the indicator using the included dovetail extensions and universal clamp, ensuring the spindle axis is aligned with the direction of measurement for accurate readings. Avoid side-loading the contact point, as lateral force can affect accuracy and jeweled bearing life. The contact point should be pre-loaded lightly against the workpiece before zeroing the dial. Handle the fitted case and calibration certificate carefully, as NIST traceability documentation may be required for inspection records.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Measurement Range\u003c\/strong\u003e: 0.03 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\u003eGraduation\u003c\/strong\u003e: 0.0005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.0005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndicator Style\u003c\/strong\u003e: Horizontal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Diameter\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Color\u003c\/strong\u003e: White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBearing Type\u003c\/strong\u003e: Jeweled\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount Type\u003c\/strong\u003e: Dovetail\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Point Length\u003c\/strong\u003e: 0.64 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\u003eNumber of Contact Points Included\u003c\/strong\u003e: 2\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\u003eFinish\u003c\/strong\u003e: Satin Chrome\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 4.34 inches L x 2.45 inches W x 1.38 inches H\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.2 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: 21-378-5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51714213871922,"sku":"21-378-5","price":112.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5423136201bf847e86924a815fae0adc.jpg?v=1788497605","url":"https:\/\/voomisupply.com\/products\/spi-21-378-5-dial-test-indicator-0-03-in-horizontal","provider":"Voomi Supply","version":"1.0","type":"link"}