{"product_id":"thomson-industries-qs-3-4-l-48-round-linear-shaft","title":"Thomson Industries Qs 3\/4 L 48 Round Linear Shaft","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe THOMSON INDUSTRIES QS 3\/4 L 48 is a standard round linear shafting rod used in linear motion systems, guide assemblies, and precision mechanical applications. Machined from 1566 grade steel with a hardness of 60 to 65 Rockwell C, it provides a consistent, wear-resistant running surface for linear bearings, bushings, and pillow block assemblies. The shaft measures 0.75 inches in nominal diameter with a tight tolerance range of 0.7490 inches to 0.7495 inches, ensuring accurate fit in bearing bores. Overall length is 48 inches. Weighing 8 pounds, this shaft suits both horizontal and vertical mounting configurations in industrial and OEM equipment builds.\u003c\/p\u003e\u003cp\u003eThis shafting is used in a broad range of linear motion applications including conveyor systems, slide rails, automation equipment, gantry assemblies, and precision positioning stages. Mechanical and maintenance technicians install this type of shaft in both light industrial and heavier duty equipment where consistent diameter tolerance is required over the full shaft length. The 48-inch length is a common stock dimension suitable for cutting to custom length in the field or used full-length in longer travel assemblies.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1566 grade steel construction for strength and machinability\u003c\/li\u003e\n\u003cli\u003eHardness of 60 to 65 Rockwell C for durability under bearing loads\u003c\/li\u003e\n\u003cli\u003eDiameter tolerance of 0.7490 inches to 0.7495 inches for precise bearing fit\u003c\/li\u003e\n\u003cli\u003e48-inch overall length suitable for full-length use or field cutting\u003c\/li\u003e\n\u003cli\u003eStandard shaft type compatible with common linear bearing and bushing bore sizing\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 requiring a 0.75-inch nominal diameter steel shaft with standard hardness and tolerance specifications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by mechanical technicians or maintenance personnel familiar with linear motion assemblies. Before servicing or replacing shafting in an existing assembly, de-energize all associated drive and actuator components and relieve any spring or load tension bearing on the shaft. Use appropriate shaft supports, collars, and end fixturing per the equipment manufacturer specifications. Consult applicable machinery safety standards when integrating shafting into automated or motorized systems.\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: 48 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: 8 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 48\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"THOMSON INDUSTRIES","offers":[{"title":"Default Title","offer_id":67913242870066,"sku":"QS 3\/4 L 48","price":135.22,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/936323116bd138bd5acb643b0c3ae47b_99b7a28f-1ae5-4201-b7e3-b12aade66651.jpg?v=1791243848","url":"https:\/\/voomisupply.com\/products\/thomson-industries-qs-3-4-l-48-round-linear-shaft","provider":"Voomi Supply","version":"1.0","type":"link"}