{"product_id":"spi-21-233-2-cupped-ball-contact-point-dial-indicator","title":"Spi 21-233-2 Cupped Ball Contact Point Dial Indicator","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SPI 21-233-2 is a cupped ball contact point designed for use with dial indicators in precision measurement applications. Machined from steel, this contact point threads onto standard dial indicator stems using a 4-48 thread. It measures 0.118 inches in diameter and has a contact point length of 0.28 inches, conforming to AGD Group 1 industry standards. The cupped ball tip style provides stable, repeatable contact on rounded or irregular workpiece surfaces, making it a reliable choice for metrology professionals, machinists, and quality control technicians who require consistent gauge readings.\u003c\/p\u003e\n\u003cp\u003eThis contact point is used in shop-floor and inspection environments where dial indicators are employed to measure runout, surface variation, concentricity, or part deflection. It is suited for both manual gauging setups and fixture-mounted indicator applications. The AGD Group 1 designation confirms dimensional compatibility with a wide range of standard dial indicators used in industrial and precision measurement settings.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCupped ball contact point style for stable contact on curved or uneven surfaces\u003c\/li\u003e\n  \u003cli\u003eSteel construction for durability in production and inspection environments\u003c\/li\u003e\n  \u003cli\u003e4-48 thread size for compatibility with AGD Group 1 dial indicators\u003c\/li\u003e\n  \u003cli\u003e0.118 inches contact diameter and 0.28 inches contact point length\u003c\/li\u003e\n  \u003cli\u003eConforms to AGD Group 1 industry designation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with dial indicators accepting a 4-48 threaded contact point, conforming to AGD Group 1 specifications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eContact point replacement is typically performed by metrology technicians or machinists. Thread the contact point onto the dial indicator stem by hand, then snug it carefully to avoid cross-threading or over-torquing the fine 4-48 threads. Ensure the indicator is removed from any active measurement fixture before replacing the contact point. Inspect threads on both the contact point and indicator stem for damage before installation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Point Style\u003c\/strong\u003e: Cupped Ball\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 4-48\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Point Length\u003c\/strong\u003e: 0.28 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Diameter\u003c\/strong\u003e: 0.118 inches (3.00 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIndustry Designation\u003c\/strong\u003e: AGD Group 1\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFor Use With\u003c\/strong\u003e: Dial Indicators\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 21-233-2\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":51706440909106,"sku":"21-233-2","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c91ccb0cc6066c428ff525e34d3f4703.jpg?v=1788434512","url":"https:\/\/voomisupply.com\/products\/spi-21-233-2-cupped-ball-contact-point-dial-indicator","provider":"Voomi Supply","version":"1.0","type":"link"}