{"product_id":"spi-21-123-5-ball-contact-point-carbide-tesa-indicators","title":"Spi 21-123-5 Ball Contact Point Carbide Tesa Indicators","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SPI 21-123-5 is a carbide ball contact point designed for use with test indicators in precision measurement applications. The contact point features a 0.078-inch ball diameter and a total contact point length of 0.497 inches, delivering repeatable, low-wear contact on workpiece surfaces. The carbide tip material resists abrasion and deformation, maintaining dimensional accuracy over extended service cycles. This type of contact point is installed by machinists, quality control technicians, and toolroom professionals who require consistent gauge-point geometry when taking surface, bore, or runout measurements.\u003c\/p\u003e\u003cp\u003eThis contact point is suited for inspection and metrology work on precision components in both shop-floor and controlled measurement environments. It threads into compatible test indicator spindles and replaces worn or damaged stock contact points. Applications include checking part flatness, concentricity, and feature-to-feature relationships on machined parts. The small ball diameter allows access to tight features and fine surface contours where larger contact geometries would introduce error.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCarbide ball tip resists wear and maintains accuracy over repeated measurements\u003c\/li\u003e\n\u003cli\u003e0.078-inch ball diameter for access to tight features and fine surface profiles\u003c\/li\u003e\n\u003cli\u003e0.497-inch contact point length for proper reach and lever geometry on compatible indicators\u003c\/li\u003e\n\u003cli\u003eLow contact-point mass minimizes influence on sensitive indicator mechanisms\u003c\/li\u003e\n\u003cli\u003eReplacement-style fitment for field swapping during routine indicator maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with Tesa test indicators.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a machinist or metrology technician using the appropriate contact point wrench or driver to thread the point securely into the indicator spindle without over-torquing the threaded fitting. Zero the indicator after replacing the contact point to confirm proper seating and stylus deflection. Handle carbide-tipped contact points carefully to avoid chipping the ball on hard surfaces.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall Diameter\u003c\/strong\u003e: 0.078 inches (2.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Point Length\u003c\/strong\u003e: 0.497 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTip Material\u003c\/strong\u003e: Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 1 inch H x 0.25 inches W x 0.25 inches L\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\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: 21-123-5\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SPIROTHERM","offers":[{"title":"Default Title","offer_id":67607965106482,"sku":"21-123-5","price":21.2,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8dd9b0444bd16118925bba71998aa970.jpg?v=1790431405","url":"https:\/\/voomisupply.com\/products\/spi-21-123-5-ball-contact-point-carbide-tesa-indicators","provider":"Voomi Supply","version":"1.0","type":"link"}