{"product_id":"gibraltar-826821-g-shoulder-tooling-ball-0-5-in-press-fit","title":"Gibraltar 826821-G Shoulder Tooling Ball 0.5 in Press-fit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe GIBRALTAR 826821-G is a shoulder-style inspection tooling ball used in precision fixturing and part-location applications on machine tools and coordinate measuring setups. The ball measures 0.5 inches in diameter with a 0.25-inch press-fit shank, and the ball center sits 0.5 inches above the shoulder bottom and 1.375 inches above the shank bottom. Manufactured from heat-treated steel, the part holds a ball-and-shank concentricity of 0.0002 inches, making it suitable for high-accuracy inspection and datum referencing work. A licensed machinist or tooling specialist typically installs and qualifies this component.\u003c\/p\u003e\u003cp\u003eThis tooling ball is intended for use in inspection fixtures, jigs, and precision workholding setups found in machine shops, aerospace fabrication cells, and general manufacturing environments. The shoulder design provides a positive, repeatable seating surface against a fixture body, allowing consistent ball-center positioning across multiple setups. The press-fit shank attachment keeps the ball firmly secured without threading. No specific equipment brand or model compatibility is stated by the manufacturer for this part.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eHeat-treated steel construction for durability and dimensional stability\u003c\/li\u003e\n\u003cli\u003e0.5-inch ball diameter with 0.0002-inch ball-and-shank concentricity tolerance\u003c\/li\u003e\n\u003cli\u003e0.25-inch press-fit shank with a shank tolerance of +0.0003 \/ -0.0000 inches\u003c\/li\u003e\n\u003cli\u003eShoulder design provides a positive seating datum against the fixture face\u003c\/li\u003e\n\u003cli\u003eBall center to shoulder bottom: 0.5 inches; ball center to shank bottom: 1.375 inches\u003c\/li\u003e\n\u003cli\u003eNon-tapped, non-breakaway configuration for straightforward fixed-location use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style precision tooling component for use in standard inspection fixture bores accepting a 0.25-inch press-fit shank; no specific equipment model compatibility is stated in the product data.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by a tooling technician or machinist. The receiving bore must be machined to the correct press-fit tolerance before installation; do not force the shank into an undersized hole without verifying bore diameter. A press or arbor press is the recommended tool for seating the shank — avoid striking the ball directly. Verify ball-center height against fixture datums after installation before qualifying the fixture for production or inspection use.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTooling Ball Style\u003c\/strong\u003e: Inspection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall Diameter\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Attachment Type\u003c\/strong\u003e: Press-Fit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Tolerance\u003c\/strong\u003e: +0.0003 \/ -0.0000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall Center to Shoulder Bottom\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall Center to Shank Bottom\u003c\/strong\u003e: 1.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBall and Shank Concentricity\u003c\/strong\u003e: 0.0002 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShoulder\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBreakaway\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTapped Shank\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeat-Treated\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 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: GIBRALTAR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 826821-G\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GIBRALTAR","offers":[{"title":"Default Title","offer_id":51719314178354,"sku":"826821-G","price":72.34,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d515d57218a3ee57121308c9292dad2d.jpg?v=1788558775","url":"https:\/\/voomisupply.com\/products\/gibraltar-826821-g-shoulder-tooling-ball-0-5-in-press-fit","provider":"Voomi Supply","version":"1.0","type":"link"}