{"product_id":"mitutoyo-2904a-dial-drop-indicator-1-in-0-001-grad","title":"Mitutoyo 2904A Dial Drop Indicator 1 in 0.001 Grad","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe MITUTOYO 2904A is a dial drop indicator designed for dimensional inspection and surface measurement in manufacturing, machining, and metrology applications. It delivers a 1-inch measuring range with a 0.001-inch graduation, giving technicians and machinists precise linear displacement readings in English units. The white-faced dial reads 100-0, and a built-in revolution counter tracks full-spindle rotations across the 1-inch range. The lug back mount allows secure fixture to magnetic bases, indicator holders, and transfer gages. This instrument meets ANSI\/AGD standards and carries an AGD Group 2 designation, confirming it to a widely recognized dimensional and mechanical specification for dial indicators.\u003c\/p\u003e\u003cp\u003eThe 2904A suits toolroom inspection, machine setup, runout checking, and part comparison tasks on mills, lathes, surface plates, and CMM fixtures. It is a common choice for machinists, quality technicians, and tool and die professionals who require repeatable contact-measurement results. The 2-1\/4-inch dial face provides clear readability in tight fixture setups. With a measuring force of 1.80 N, spindle deflection on delicate workpieces is minimized during contact measurement.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1-inch total measuring range in English units\u003c\/li\u003e\n\u003cli\u003e0.001-inch graduation for precise linear displacement readings\u003c\/li\u003e\n\u003cli\u003eBuilt-in revolution counter tracks full spindle rotations\u003c\/li\u003e\n\u003cli\u003eLug back mount for compatibility with standard indicator holders and magnetic bases\u003c\/li\u003e\n\u003cli\u003eWhite dial face with 100-0 reading for easy visual interpretation\u003c\/li\u003e\n\u003cli\u003eMeets ANSI\/AGD standards, AGD Group 2 designation\u003c\/li\u003e\n\u003cli\u003eLow 1.80 N measuring force reduces deflection on sensitive workpieces\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with standard AGD Group 2 indicator holders, magnetic bases, and transfer gage fixtures that accept a 0.375-inch stem diameter and lug back mounting.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and use of precision dial indicators is typically performed by machinists or quality technicians without special licensing requirements. Secure the lug back to the appropriate holder before contacting the workpiece, and verify the spindle moves freely through its full range prior to measurement. Do not overtighten the mounting clamp against the stem, as this can bind the spindle and introduce measurement error. Zero the dial face after securing the indicator at the desired contact point.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasuring Range\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Graduation\u003c\/strong\u003e: 0.001 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAccuracy\u003c\/strong\u003e: 0.002 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Reading\u003c\/strong\u003e: 100-0\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRange Per Revolution\u003c\/strong\u003e: 0.1 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Diameter\u003c\/strong\u003e: 2-1\/4 inches (57.15 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStem Diameter\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStem Length\u003c\/strong\u003e: 13.60 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 115.70 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMeasuring Force\u003c\/strong\u003e: 1.80 N\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBack Type\u003c\/strong\u003e: Lug\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDial Color\u003c\/strong\u003e: White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-48\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRevolution Counter\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: ANSI\/AGD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAGD Group\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e: English\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.46 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: MITUTOYO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 2904A\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MITUTOYO","offers":[{"title":"Default Title","offer_id":51558782206258,"sku":"2904A","price":173.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/32773bb41df5ece5f49c626218956b65.jpg?v=1786420422","url":"https:\/\/voomisupply.com\/products\/mitutoyo-2904a-dial-drop-indicator-1-in-0-001-grad","provider":"Voomi Supply","version":"1.0","type":"link"}