{"product_id":"thomson-industries-qs-3-4-l-72-round-linear-shafting","title":"Thomson Industries Qs 3\/4 L 72 Round Linear Shafting","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe THOMSON INDUSTRIES QS 3\/4 L 72 is a round linear shafting rod used in linear motion systems, machine assemblies, and precision mechanical applications. Machined from 1566 grade steel and case-hardened to 60 to 65 Rockwell C, this shaft delivers the surface hardness required for use with linear bearings and bushings. The nominal diameter is 0.75 inches, held to a tight tolerance range of 0.7490 to 0.7495 inches across the full 72-inch length. Installation is typically handled by mechanical assemblers, machine builders, or maintenance technicians working on motion control or industrial equipment.\u003c\/p\u003e\u003cp\u003eThis shafting is suited for residential and commercial machine assemblies where a standard 3\/4-inch round shaft is required. Common applications include linear actuator systems, gantry assemblies, automated equipment frames, and support shaft configurations. The 72-inch length provides flexibility for custom cut-to-length installations or direct drop-in use in longer travel systems. Its hardened steel construction makes it appropriate for environments where the shaft interfaces with recirculating ball or plain bearing elements.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1566 grade steel construction for consistent mechanical properties\u003c\/li\u003e\n\u003cli\u003eCase hardness of 60 to 65 Rockwell C for wear resistance at bearing contact zones\u003c\/li\u003e\n\u003cli\u003eTight diameter tolerance of 0.7490 to 0.7495 inches for reliable bearing fit\u003c\/li\u003e\n\u003cli\u003e72-inch overall length supports long-travel or cut-to-length installations\u003c\/li\u003e\n\u003cli\u003eStandard 3\/4-inch nominal diameter for broad compatibility with linear bearing components\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-build component for linear motion systems that accept standard 3\/4-inch round hardened steel shafting.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by mechanical technicians or machine builders using standard shaft support blocks, end supports, and linear bearing assemblies. Ensure the mounting structure is de-energized and any loaded components are secured before removing or installing shafting. Use appropriate cutting tools rated for hardened steel if field-cutting to length, and deburr cut ends before fitting bearings. Verify shaft support spacing per the application load requirements to prevent deflection.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Diameter\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Diameter Tolerance\u003c\/strong\u003e: 0.7490 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Diameter Tolerance\u003c\/strong\u003e: 0.7495 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 72 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: 1566\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness\u003c\/strong\u003e: 60 to 65 Rockwell C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 9.4 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: THOMSON INDUSTRIES\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: QS 3\/4 L 72\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"THOMSON INDUSTRIES","offers":[{"title":"Default Title","offer_id":67908100981042,"sku":"QS 3\/4 L 72","price":229.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/936323116bd138bd5acb643b0c3ae47b_93d4db8e-7c92-45e6-81da-8e29593cdabe.jpg?v=1791182475","url":"https:\/\/voomisupply.com\/products\/thomson-industries-qs-3-4-l-72-round-linear-shafting","provider":"Voomi Supply","version":"1.0","type":"link"}