{"product_id":"starrett-72443-test-indicator-ball-contact-point-steel","title":"Starrett 72443 Test Indicator Ball Contact Point Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe STARRETT 72443 is a ball-style contact point designed for use with dial test indicators in precision measurement applications. The contact point features a 2 mm (0.0787 inch) steel ball tip and a total contact point length of 15.88 mm. It threads into compatible dial test indicator stems and provides a spherical contact surface that maintains accurate readings on curved, angled, or irregular workpiece surfaces. Licensed metrology technicians, machinists, and quality control professionals install this type of contact point when standard flat or pointed tips are not suited to the surface geometry being measured. The steel construction provides durability under repeated contact cycles in shop environments.\u003c\/p\u003e\n\u003cp\u003eThe 72443 is intended for use with the Starrett 811 and 811M Dial Test Indicators. It is well suited to machine shop and inspection applications where a ball contact tip is required for measuring inside bores, contoured surfaces, or features that a flat contact tip would bridge across rather than seat on. The part ships individually and is sold as a single unit, making it a straightforward replacement when a contact tip is worn, damaged, or lost.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e2 mm ball diameter provides a defined spherical contact surface for curved and angled workpieces\u003c\/li\u003e\n  \u003cli\u003e15.88 mm contact point length fits standard dial test indicator stem geometry\u003c\/li\u003e\n  \u003cli\u003eSteel construction for wear resistance in production and inspection environments\u003c\/li\u003e\n  \u003cli\u003ePoint Identification PT22315 for cross-reference and reorder confirmation\u003c\/li\u003e\n  \u003cli\u003eCompliant with California Proposition 65 disclosure standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use with the Starrett 811 and 811M Dial Test Indicators as stated by the manufacturer.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eContact point replacement on dial test indicators is typically performed by machinists or metrology technicians. Before changing contact points, remove the indicator from its mounting and place it on a clean, stable surface. Thread the contact point in carefully by hand to avoid cross-threading the fine indicator stem threads, then snug lightly — do not overtighten. Verify indicator function and zero repeatability against a known reference surface after any contact point change.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBall Diameter\u003c\/strong\u003e: 2 mm (0.0787 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Point Length\u003c\/strong\u003e: 15.88 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTip Diameter\u003c\/strong\u003e: 2 mm (0.0780 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContact Point Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePoint Identification\u003c\/strong\u003e: PT22315\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.5 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStandards\u003c\/strong\u003e: California Proposition 65\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: STARRETT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 72443\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STARRETT","offers":[{"title":"Default Title","offer_id":51542644326706,"sku":"72443","price":31.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0625bb236f7cfe0e32d6446acab99e77.jpg?v=1785904103","url":"https:\/\/voomisupply.com\/products\/starrett-72443-test-indicator-ball-contact-point-steel","provider":"Voomi Supply","version":"1.0","type":"link"}