{"product_id":"nickel-plated-linear-ball-bearing-lm3uu-lm20uu-3d-printer-cnc","title":"Nickel Plated Linear Ball Bearing LM3UU–LM20UU for 3D Printers CNC","description":"\n\u003ch2\u003eNickel Plated Linear Ball Bearings – LM3UU to LM20UU\u003c\/h2\u003e\n\u003cp\u003eUpgrade your 3D printer, CNC machine, or precision automation equipment with these high-quality \u003cstrong\u003enickel plated linear ball bearings\u003c\/strong\u003e. Engineered from chrome steel with a nylon cage and a smooth nickel-plated finish, these bearings deliver quiet, precise, and long-lasting linear motion performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eMade in Mainland China.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Precision \u0026amp; Low Noise:\u003c\/strong\u003e Nylon ball cage keeps balls uniformly spaced for ultra-smooth, quiet operation even at high speeds.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLong Service Life:\u003c\/strong\u003e Chrome steel construction with nickel plating resists wear and corrosion for extended durability.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Sizing:\u003c\/strong\u003e Available in 10 sizes to fit a wide range of shaft diameters — from LM3UU (3mm) all the way to LM20UU (20mm).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh Load Capacity:\u003c\/strong\u003e Static load capacity (C\u003csub\u003eor\u003c\/sub\u003e): 1570N | Dynamic load capacity (C\u003csub\u003er\u003c\/sub\u003e): 813N.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Application:\u003c\/strong\u003e Ideal for 3D printers, CNC equipment, robotic arms, office automation, precision measuring instruments, and other linear motion devices.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eShaft Ø (mm)\u003c\/th\u003e\n\u003cth\u003eOuter Ø (mm)\u003c\/th\u003e\n\u003cth\u003eLength (mm)\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLM3UU\u003c\/td\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003e7\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLM4UU\u003c\/td\u003e\n\u003ctd\u003e4\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLM5UU\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLM6UU\u003c\/td\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e19\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLM8UU\u003c\/td\u003e\n\u003ctd\u003e8\u003c\/td\u003e\n\u003ctd\u003e15\u003c\/td\u003e\n\u003ctd\u003e24\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLM10UU\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003ctd\u003e19\u003c\/td\u003e\n\u003ctd\u003e29\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLM12UU\u003c\/td\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003ctd\u003e21\u003c\/td\u003e\n\u003ctd\u003e30\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLM13UU\u003c\/td\u003e\n\u003ctd\u003e13\u003c\/td\u003e\n\u003ctd\u003e23\u003c\/td\u003e\n\u003ctd\u003e32\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLM16UU\u003c\/td\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003ctd\u003e28\u003c\/td\u003e\n\u003ctd\u003e37\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003eLM20UU\u003c\/td\u003e\n\u003ctd\u003e20\u003c\/td\u003e\n\u003ctd\u003e32\u003c\/td\u003e\n\u003ctd\u003e42\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eMaterial \u0026amp; Construction\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHousing Material:\u003c\/strong\u003e Chrome Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Nickel Plated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCage Material:\u003c\/strong\u003e Nylon\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 1 Piece per order\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Includes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Linear Ball Bearing (model of your choice)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eYou May Also Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1pc-10g-high-grade-silicon-grease-lubricant-o-lubrication-good-odorless-smoothness-for-o-rings-tube-silicone-grease-lubricant\"\u003e1PC 10g High Grade Silicone Grease Lubricant for O-Rings \u0026amp; Moving Parts\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/3pcs-silicone-sealant-scraper-set-multi-functional-caulking-nozzle-tools-for-tile-floor-joints-grout-finishing-and-renovation\"\u003e3PCS Silicone Sealant Scraper Set – Multi-Functional Tool Kit\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1pc-multi-use-faucet-bubbler-wrenches-6-sizes-sink-wrenches-detach-tool-for-kitchen-bathroom-faucet-parts-repair-spanner\"\u003e1PC Multi-Use Faucet Bubbler Wrenches – 6 Sizes Repair Spanner\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Which 3D printer models are these linear ball bearings compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: These nickel plated linear ball bearings are compatible with most popular 3D printer platforms that use standard LM_UU series shafts, including Prusa-style, Anet, and many CoreXY designs. The most commonly used size for 3D printers is LM8UU (8mm shaft). Always verify your printer's shaft diameter before ordering.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the difference between the various LM_UU sizes?\u003c\/h4\u003e\n\u003cp\u003eA: Each model number refers to the inner shaft diameter the bearing is designed to fit. For example, LM3UU fits a 3mm shaft, LM8UU fits an 8mm shaft, and LM20UU fits a 20mm shaft. Refer to the specifications table above to match the correct bearing to your shaft diameter and housing dimensions.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Do these linear bearings require lubrication?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, for optimal performance and longevity it is recommended to apply a light machine grease or oil to the bearing before installation and periodically during use. This helps maintain smooth operation and extends the service life of the bearing.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Are the dimensions accurate for CNC and precision applications?\u003c\/h4\u003e\n\u003cp\u003eA: These bearings are manufactured to standard LM_UU dimensional tolerances, making them suitable for precision linear motion applications including CNC machines, robotic arms, and measuring instruments. Please allow for minor manufacturing tolerances as noted. 1cm = 0.39 inches.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Which 3D printer models are these linear ball bearings compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"These nickel plated linear ball bearings are compatible with most popular 3D printer platforms that use standard LM_UU series shafts, including Prusa-style, Anet, and many CoreXY designs. The most commonly used size for 3D printers is LM8UU (8mm shaft). Always verify your printer's shaft diameter before ordering.\"}}, {\"@type\": \"Question\", \"name\": \"What is the difference between the various LM_UU sizes?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Each model number refers to the inner shaft diameter the bearing is designed to fit. For example, LM3UU fits a 3mm shaft, LM8UU fits an 8mm shaft, and LM20UU fits a 20mm shaft. Refer to the specifications table above to match the correct bearing to your shaft diameter and housing dimensions.\"}}, {\"@type\": \"Question\", \"name\": \"Do these linear bearings require lubrication?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, for optimal performance and longevity it is recommended to apply a light machine grease or oil to the bearing before installation and periodically during use. 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