{"product_id":"lmf-round-flange-linear-bushing-bearings","title":"LMF6LUU 6 mm - LMF50LUU 50 mm Round Flange Router Shaft Linear Bushing Bearings","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eLMF Round Flange Linear Bushing Bearings — Precision Shaft Support for CNC \u0026amp; Automation\u003c\/h2\u003e\n    \u003cp\u003eWhen your CNC router, 3D printer, or linear motion system demands smooth, repeatable shaft travel, even minor bearing slop translates directly into dimensional error and scrapped parts. Engineers, makers, and machine builders who need reliable linear guidance choose LMF-series round flange linear bushing bearings for their compact footprint and bolt-down flange design that eliminates axial drift.\u003c\/p\u003e\n    \u003cp\u003eEach bearing in this series features a hardened steel outer shell with a recirculating ball circuit and a round mounting flange drilled for standard bolt patterns. Available models span LMF6LUU through LMF50LUU, covering inner shaft diameters from 6 mm (0.24 in) to 50 mm (1.97 in), with corresponding outer diameters from 12 mm to 80 mm and body lengths from 35 mm to 192 mm. The \"LUU\" designation indicates a double-length body for extended contact and improved load distribution.\u003c\/p\u003e\n    \u003cp\u003eTypical applications include: X\/Y\/Z axis linear guides on CNC routers and laser cutters; carriage assemblies in Cartesian 3D printers requiring low-friction shaft bearings; and industrial pick-and-place or conveyor automation where round flange linear bearings must mount flush to a plate with four-bolt retention.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-compat\"\u003e\n    \u003cspan class=\"hdiy-compat-icon\"\u003e🔩\u003c\/span\u003e\n    Compatible with standard smooth hardened steel shafts (h7 tolerance recommended). Match bearing inner diameter to shaft diameter — see variant options for your size.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These LMF Round Flange Linear Bushing Bearings\u003c\/h2\u003e\n    \u003cdiv class=\"hdiy-list\"\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n        \u003cstrong\u003eRound Flange Mounting\u003c\/strong\u003e — Four-bolt round flange allows direct plate mounting, eliminating the need for separate bearing housings and reducing assembly height.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n        \u003cstrong\u003eDouble-Length \"LUU\" Body\u003c\/strong\u003e — Extended recirculating ball circuit increases contact length for higher load capacity and reduced shaft deflection compared to standard-length variants.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📏\u003c\/span\u003e\n        \u003cstrong\u003eWide Size Range (6–50 mm ID)\u003c\/strong\u003e — Twelve models from LMF6LUU to LMF50LUU cover the most common shaft diameters used in CNC, robotics, and automation builds.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e⚙️\u003c\/span\u003e\n        \u003cstrong\u003eHardened Steel Construction\u003c\/strong\u003e — Outer shell and ball retainer manufactured from hardened steel for dimensional stability under cyclic radial and moment loads.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🎯\u003c\/span\u003e\n        \u003cstrong\u003eLow-Friction Recirculating Balls\u003c\/strong\u003e — Ball circuit design minimizes sliding friction, enabling smooth, consistent linear travel at both low and moderate traverse speeds.\n      \u003c\/div\u003e\n      \u003cdiv\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🛠️\u003c\/span\u003e\n        \u003cstrong\u003eDrop-In Replacement Geometry\u003c\/strong\u003e — Conforms to standard LMF\/LMF…LUU dimensional specifications, making these a direct swap for worn bearings in existing machine frames.\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications — LMF Round Flange Linear Bushing Bearings\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eBearing Type\u003c\/th\u003e\n\u003ctd\u003eRound Flange Linear Bushing (LMF…LUU Series)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eInner Diameter (Shaft)\u003c\/th\u003e\n\u003ctd\u003e6 mm – 50 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOuter Diameter\u003c\/th\u003e\n\u003ctd\u003e12 mm – 80 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBody Length\u003c\/th\u003e\n\u003ctd\u003e35 mm – 192 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFlange Type\u003c\/th\u003e\n\u003ctd\u003eRound, 4-bolt pattern\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBody Material\u003c\/th\u003e\n\u003ctd\u003eHardened Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eLubrication\u003c\/th\u003e\n\u003ctd\u003eFactory-greased; re-lubrication recommended for extended service\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eDynamic Load Rating\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eStatic Load Rating\u003c\/th\u003e\n\u003ctd\u003eSee variant options\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eShaft Tolerance (Recommended)\u003c\/th\u003e\n\u003ctd\u003eh7\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 PCS\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-faq\"\u003e\n    \u003ch2\u003e❓ Frequently Asked Questions\u003c\/h2\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow do I choose the right LMF bearing size for my build?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMatch the bearing's inner diameter (ID) to your shaft diameter. For example, if you are running a 10 mm hardened steel shaft, select the LMF10LUU (10 × 19 × 55 mm). The outer diameter and body length are fixed per model — confirm they fit your housing or mounting plate before ordering.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat shaft tolerance is recommended for these linear bushing bearings?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eAn h7 shaft tolerance is recommended for standard clearance fit. Using an undersized or rough-ground shaft will increase play and reduce bearing life. For precision CNC applications, pair with ground and hardened steel shafts (typically 60 HRC surface hardness or higher).\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these bearings suitable for corrosive or wet environments?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe standard LMF…LUU series uses hardened steel construction, which is not inherently corrosion-resistant. For humid, washdown, or mildly corrosive environments, apply a compatible bearing grease regularly and consider adding shaft wipers or bellows covers. For highly corrosive conditions, contact us to confirm material options.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the difference between LMF and LM series linear bearings?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eLM-series bearings have a cylindrical outer body and require a separate housing or pillow block for mounting. LMF-series bearings add an integrated round flange, allowing direct bolt-down mounting to a flat plate without a separate housing — saving space and assembly steps in CNC router and 3D printer frames.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat does the \"LUU\" suffix mean, and why does it matter?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003e\"LUU\" indicates a double-length body compared to the standard \"LU\" variant. The longer body provides a larger ball contact area, which increases dynamic load capacity and reduces shaft deflection under moment loads. This makes LUU bearings the preferred choice for cantilevered or heavily loaded carriage assemblies.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan I use these bearings in a 3D printer or laser cutter?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. LMF…LUU round flange linear bushing bearings are widely used in Cartesian 3D printers, CoreXY machines, and CO₂ laser cutters where smooth, low-friction shaft travel is critical. Select the model whose inner diameter matches your guide rod diameter (commonly 6 mm, 8 mm, 10 mm, or 12 mm in desktop machines).\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow should I lubricate and maintain these bearings?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eBearings are factory-greased and ready to install. For ongoing maintenance, apply a thin film of lithium-based or NLGI #2 bearing grease through the grease port (if present) or by disassembling and repacking every 200–500 operating hours depending on load and speed. Wipe the shaft clean before re-installation to prevent contamination.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-cta\"\u003e\n    🛒 Select your model and size above, then add to cart.\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How do I choose the right LMF bearing size for my build?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Match the bearing's inner diameter (ID) to your shaft diameter. For example, if you are running a 10 mm hardened steel shaft, select the LMF10LUU (10 × 19 × 55 mm). The outer diameter and body length are fixed per model — confirm they fit your housing or mounting plate before ordering.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What shaft tolerance is recommended for these linear bushing bearings?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"An h7 shaft tolerance is recommended for standard clearance fit. Using an undersized or rough-ground shaft will increase play and reduce bearing life.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these bearings suitable for corrosive or wet environments?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The standard LMF…LUU series uses hardened steel construction, which is not inherently corrosion-resistant. For humid or mildly corrosive environments, apply a compatible bearing grease regularly and consider adding shaft wipers or bellows covers.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between LMF and LM series linear bearings?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"LM-series bearings have a cylindrical outer body and require a separate housing. LMF-series bearings add an integrated round flange for direct bolt-down mounting to a flat plate without a separate housing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does the 'LUU' suffix mean, and why does it matter?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"'LUU' indicates a double-length body compared to the standard 'LU' variant, providing a larger ball contact area for higher load capacity and reduced shaft deflection.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use these bearings in a 3D printer or laser cutter?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. LMF…LUU round flange linear bushing bearings are widely used in Cartesian 3D printers, CoreXY machines, and CO₂ laser cutters where smooth, low-friction shaft travel is critical.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How should I lubricate and maintain these bearings?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Bearings are factory-greased and ready to install. For ongoing maintenance, apply a thin film of lithium-based or NLGI #2 bearing grease every 200–500 operating hours depending on load and speed.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"LMF6LUU \/ 6 x 12 x 35 mm \/ 1 PCS","offer_id":52448893567250,"sku":"GYJLTBJT00641x1","price":9.93,"currency_code":"USD","in_stock":true},{"title":"LMF8LUU \/ 8 x 15 x 45 mm \/ 1 PCS","offer_id":52448893600018,"sku":"GYJLTBJT00646x1","price":11.36,"currency_code":"USD","in_stock":true},{"title":"LMF10LUU \/ 10 x 19 x 55 mm \/ 1 PCS","offer_id":52448893632786,"sku":"GYJLTBJT00640x1","price":14.13,"currency_code":"USD","in_stock":true},{"title":"LMF12LUU \/ 12 x 21 x 57 mm \/ 1 PCS","offer_id":52448893665554,"sku":"GYJLTBJT00643x1","price":15.22,"currency_code":"USD","in_stock":true},{"title":"LMF13LUU \/ 13 x 23 x 61 mm \/ 1 PCS","offer_id":52448893698322,"sku":"GYJLTBJT00642x1","price":19.43,"currency_code":"USD","in_stock":true},{"title":"LMF16LUU \/ 16 x 28 x 70 mm \/ 1 PCS","offer_id":52448893731090,"sku":"GYJLTBJT00649x1","price":27.19,"currency_code":"USD","in_stock":true},{"title":"LMF20LUU \/ 20 x 32 x 80 mm \/ 1 PCS","offer_id":52448893763858,"sku":"GYJLTBJT00647x1","price":35.29,"currency_code":"USD","in_stock":true},{"title":"LMF25LUU \/ 25 x 40 x 112 mm \/ 1 PCS","offer_id":52448893796626,"sku":"GYJLTBJT00648x1","price":71.25,"currency_code":"USD","in_stock":true},{"title":"LMF30LUU \/ 30 x 45 x 123 mm \/ 1 PCS","offer_id":52448893829394,"sku":"GYJLTBJT00645x1","price":80.36,"currency_code":"USD","in_stock":true},{"title":"LMF35LUU \/ 35 x 52 x 135 mm \/ 1 PCS","offer_id":52448893862162,"sku":"GYJLTBJT00650x1","price":129.59,"currency_code":"USD","in_stock":true},{"title":"LMF40LUU \/ 40 x 60 x 154 mm \/ 1 PCS","offer_id":52448893894930,"sku":"GYJLTBJT00644x1","price":177.33,"currency_code":"USD","in_stock":true},{"title":"LMF50LUU \/ 50 x 80 x 192 mm \/ 1 PCS","offer_id":52448893927698,"sku":"GYJLTBJT00651x1","price":511.16,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/Main-01_3746120a-1655-4edd-bd7d-d28732af5e14.jpg?v=1783686150","url":"https:\/\/homediyer.com\/products\/lmf-round-flange-linear-bushing-bearings","provider":"HomeDIYer","version":"1.0","type":"link"}