{"product_id":"thomson-industries-qsm-20-l-12-round-linear-shaft","title":"Thomson Industries Qsm 20 L 12 Round Linear Shaft","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe THOMSON INDUSTRIES QSM 20 L 12 is a standard round linear shaft designed for use in linear motion systems and mechanical assemblies. Machined from steel and through-hardened to a Rockwell hardness of 60 to 65C, this shaft provides the surface durability required for recirculating ball bushing and linear bearing applications. The shaft measures 20mm in diameter with a close diameter tolerance range of 0.7869 inches to 0.7874 inches, and an overall length of 12 inches. Licensed HVAC and mechanical trade installers as well as industrial maintenance technicians are the primary end users for this type of linear motion component.\u003c\/p\u003e\n\u003cp\u003eThis shaft is suited for residential and commercial linear motion assemblies including actuators, slides, and precision positioning equipment. The 20mm diameter and 12-inch length make it appropriate for compact drive systems and guided linear travel applications. It is a direct-fit standard shaft intended for use wherever a hardened steel linear shaft of this diameter and length is specified by the equipment manufacturer or system designer. No compatibility with specific model numbers or system families is stated in the available product data.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eThrough-hardened steel construction rated at 60 to 65C Rockwell hardness for wear resistance in bearing contact zones\u003c\/li\u003e\n  \u003cli\u003eTight diameter tolerance of 0.7869 inches to 0.7874 inches for precise linear bearing fitment\u003c\/li\u003e\n  \u003cli\u003e20mm nominal shaft diameter in a 12-inch overall length\u003c\/li\u003e\n  \u003cli\u003eStandard shaft type compatible with common linear bushing and rail systems\u003c\/li\u003e\n  \u003cli\u003eSteel material provides high load capacity and dimensional stability\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-fit standard shaft for linear motion assemblies requiring a 20mm diameter hardened steel round shaft at 12 inches in length.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by millwrights, mechanical technicians, or industrial maintenance personnel. Always de-energize and lock out the machine before removing or installing linear shafting. Confirm shaft alignment with the bearing or bushing housing before securing end supports to prevent side loading. Inspect mating linear bearings for wear before installing a new shaft.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShaft Diameter\u003c\/strong\u003e: 20mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 12 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Diameter Tolerance\u003c\/strong\u003e: 0.7869 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Diameter Tolerance\u003c\/strong\u003e: 0.7874 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardness\u003c\/strong\u003e: 60 to 65C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShaft Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.656 pounds\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: THOMSON INDUSTRIES\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: QSM 20 L 12\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"THOMSON INDUSTRIES","offers":[{"title":"Default Title","offer_id":67912380580146,"sku":"QSM 20 L 12","price":50.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f40dc496edc3bc4ba5885fdf68cc9387_d9008a95-f773-47fa-9126-74438500da38.jpg?v=1791234110","url":"https:\/\/voomisupply.com\/products\/thomson-industries-qsm-20-l-12-round-linear-shaft","provider":"Voomi Supply","version":"1.0","type":"link"}