{"product_id":"lmk-linear-square-flange-mount-bearing-bushing-6-60mm","title":"LMK6UU-LMK60UU,6-60mm Linear Square Flange Mount Bearing Linear Bushing Bearings","description":"\u003cdiv class=\"hdiy-desc\"\u003e\n\n  \u003cdiv class=\"hdiy-overview\"\u003e\n    \u003ch2\u003eLMK Linear Square Flange Bearing — Precise Linear Motion from 6mm to 60mm\u003c\/h2\u003e\n    \u003cp\u003eEngineers and makers building CNC routers, 3D printers, or automated linear stages often struggle to find LMK linear square flange bearings that combine dimensional accuracy with consistent surface finish across a wide size range. Whether you are retrofitting a worn axis or designing a new motion system from scratch, these LMK linear bushing bearings deliver repeatable, low-friction travel on hardened steel shafts.\u003c\/p\u003e\n    \u003cp\u003eEach LMK square flange bearing features a steel outer housing with a square bolt-pattern flange for rigid surface mounting. The bore ranges from 6 mm (0.24 in) up to 60 mm (2.36 in), with corresponding outer diameters from 12 mm to 90 mm and body lengths from 19 mm to 110 mm. Nickel-plated variants add a corrosion-resistant surface layer suited to humid or lightly corrosive environments. Internal recirculating ball circuits are pre-lubricated and retained within a polymer cage.\u003c\/p\u003e\n    \u003cp\u003eTypical applications include: X\/Y\/Z axis linear guides on desktop CNC mills and laser cutters; carriage slides on 3D printer gantries requiring smooth, backlash-free motion; and industrial pick-and-place fixtures where a rigid flange mount simplifies alignment to a flat plate or extrusion frame.\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    \u003cstrong\u003eShaft Compatibility:\u003c\/strong\u003e Designed for use with hardened, ground linear shafts of matching nominal diameter (6 mm, 8 mm, 10 mm, 12 mm, 13 mm, 16 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 50 mm, 60 mm). Verify shaft tolerance (h6 recommended) before ordering.\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-features\"\u003e\n    \u003ch2\u003e✅ Key Features of These LMK Linear Square Flange Bearings\u003c\/h2\u003e\n    \u003cul class=\"hdiy-list\"\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📐\u003c\/span\u003e\n        \u003cstrong\u003eWide Size Range — 6 mm to 60 mm Bore\u003c\/strong\u003e\u003cbr\u003e\n        Thirteen nominal bore sizes (LMK6UU through LMK60UU) let you source the exact bearing for your axis without adapters or custom machining.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔩\u003c\/span\u003e\n        \u003cstrong\u003eSquare Flange for Rigid Surface Mounting\u003c\/strong\u003e\u003cbr\u003e\n        The four-bolt square flange pattern allows direct bolting to flat plates, extrusion profiles, or machined housings, eliminating the need for separate pillow-block clamps.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🛡️\u003c\/span\u003e\n        \u003cstrong\u003eNickel-Plated Option for Corrosion Resistance\u003c\/strong\u003e\u003cbr\u003e\n        The nickel-plated finish variant provides an additional barrier against moisture and mild chemical exposure, extending service life in workshop or outdoor enclosure environments.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🔄\u003c\/span\u003e\n        \u003cstrong\u003eRecirculating Ball Circuit for Smooth Travel\u003c\/strong\u003e\u003cbr\u003e\n        Internal polymer-caged ball circuits distribute load evenly around the shaft, reducing stick-slip and enabling consistent motion at both low and moderate traverse speeds.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e🧲\u003c\/span\u003e\n        \u003cstrong\u003ePre-Lubricated, Ready to Install\u003c\/strong\u003e\u003cbr\u003e\n        Bearings arrive factory-lubricated with grease suitable for general linear motion duty, so you can mount and run without an initial lubrication step.\n      \u003c\/li\u003e\n      \u003cli\u003e\n        \u003cspan class=\"hdiy-icon\"\u003e📦\u003c\/span\u003e\n        \u003cstrong\u003eSold Individually — Mix Sizes as Needed\u003c\/strong\u003e\u003cbr\u003e\n        Each listing covers a single bearing unit, so you can order exactly the quantity and size combination your project requires without paying for a fixed kit.\n      \u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"hdiy-table-wrap\"\u003e\n    \u003ch2\u003e📐 Technical Specifications — LMK Linear Square Flange Bearings\u003c\/h2\u003e\n    \u003ctable\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n\u003cth\u003eBearing Series\u003c\/th\u003e\n\u003ctd\u003eLMK (Square Flange Type)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBore Diameter Range\u003c\/th\u003e\n\u003ctd\u003e6 mm – 60 mm (0.24 in – 2.36 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eOuter Diameter Range\u003c\/th\u003e\n\u003ctd\u003e12 mm – 90 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eBody Length Range\u003c\/th\u003e\n\u003ctd\u003e19 mm – 110 mm (see variant options)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFlange Type\u003c\/th\u003e\n\u003ctd\u003eSquare, 4-bolt pattern\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eMaterial — Housing\u003c\/th\u003e\n\u003ctd\u003eSteel\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eFinish Options\u003c\/th\u003e\n\u003ctd\u003eStandard (bare steel) \/ Nickel Plated\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eInternal Element\u003c\/th\u003e\n\u003ctd\u003eRecirculating steel balls, polymer cage\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eLubrication\u003c\/th\u003e\n\u003ctd\u003ePre-lubricated (grease)\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eRecommended Shaft Tolerance\u003c\/th\u003e\n\u003ctd\u003eh6 hardened, ground linear shaft\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eQuantity per Order\u003c\/th\u003e\n\u003ctd\u003e1 piece\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eSee variant options\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 correct LMK bearing size for my shaft?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eMatch the bore diameter of the bearing to the nominal diameter of your linear shaft. For example, if your shaft is 12 mm in diameter, select the LMK12UU variant. Always verify the shaft is hardened and ground to h6 tolerance for proper fit and bearing life.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat is the difference between the standard and nickel-plated versions?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe standard version has a bare steel housing suitable for dry or lightly oiled indoor environments. The nickel-plated version adds a corrosion-resistant coating that performs better in humid workshops, enclosures with condensation, or applications with occasional water splash. Both versions share the same dimensional envelope and bolt pattern.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eCan these bearings handle radial loads, or are they for axial motion only?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eLMK linear bushing bearings are designed for linear (axial) motion along a shaft. They can tolerate light radial loads inherent in guided linear systems, but they are not rated for pure radial or angular contact loading. For combined load applications, pair them with a properly sized linear shaft and support rail.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eAre these compatible with standard linear shafts from other suppliers?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eYes. LMK bearings follow standard LM series dimensional conventions, so they are compatible with hardened linear shafts of matching nominal diameter from most suppliers, provided the shaft meets h6 ground tolerance. Always confirm the outer diameter and flange bolt-circle dimensions against your housing design before assembly.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eDo I need to add grease before first use?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eNo. These bearings are pre-lubricated at the factory and are ready to install straight from the packaging. For extended duty cycles or high-speed applications, periodic re-lubrication through the grease port (where present on larger sizes) is recommended to maintain performance.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eWhat bolt size fits the square flange mounting holes?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eThe flange bolt hole diameter varies by bearing size. Smaller sizes (LMK6UU–LMK16UU) typically accept M4–M6 bolts, while larger sizes (LMK20UU–LMK60UU) use M6–M12 bolts. Refer to the dimensional drawing for your specific size or contact us to confirm the exact bolt-circle and hole diameter before machining your mounting plate.\u003c\/p\u003e\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary\u003eHow many bearings do I receive per order?\u003c\/summary\u003e\n      \u003cdiv class=\"hdiy-faq-body\"\u003e\u003cp\u003eEach order contains one (1) bearing unit of the size and finish you select. If your application requires multiple bearings — for example, two per shaft end — simply adjust the quantity in your cart accordingly.\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 size and finish 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 correct LMK bearing size for my shaft?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Match the bore diameter of the bearing to the nominal diameter of your linear shaft. For example, if your shaft is 12 mm in diameter, select the LMK12UU variant. Always verify the shaft is hardened and ground to h6 tolerance for proper fit and bearing life.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between the standard and nickel-plated versions?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The standard version has a bare steel housing suitable for dry or lightly oiled indoor environments. The nickel-plated version adds a corrosion-resistant coating that performs better in humid workshops, enclosures with condensation, or applications with occasional water splash.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can these bearings handle radial loads, or are they for axial motion only?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"LMK linear bushing bearings are designed for linear (axial) motion along a shaft. They can tolerate light radial loads inherent in guided linear systems, but they are not rated for pure radial or angular contact loading.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Are these compatible with standard linear shafts from other suppliers?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. LMK bearings follow standard LM series dimensional conventions, so they are compatible with hardened linear shafts of matching nominal diameter from most suppliers, provided the shaft meets h6 ground tolerance.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Do I need to add grease before first use?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"No. These bearings are pre-lubricated at the factory and are ready to install straight from the packaging. For extended duty cycles or high-speed applications, periodic re-lubrication is recommended.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What bolt size fits the square flange mounting holes?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The flange bolt hole diameter varies by bearing size. Smaller sizes (LMK6UU–LMK16UU) typically accept M4–M6 bolts, while larger sizes (LMK20UU–LMK60UU) use M6–M12 bolts. Contact us to confirm the exact bolt-circle and hole diameter for your specific size.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"How many bearings do I receive per order?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Each order contains one (1) bearing unit of the size and finish you select. Adjust the quantity in your cart if your application requires multiple bearings.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"HomeDIYer","offers":[{"title":"LMK6UU - 6mm x 12mm x 19mm","offer_id":52448899301650,"sku":"AATYHGY-SZSHSDZDH-2025110049x1","price":2.77,"currency_code":"USD","in_stock":true},{"title":"LMK8UU - 8mm x 15mm x 24mm","offer_id":52448899334418,"sku":"AATYHGY-SZSHSDZDH-2025110050x1","price":3.1,"currency_code":"USD","in_stock":true},{"title":"LMK10UU - 10mm x 19mm x 29mm","offer_id":52448899367186,"sku":"AATYHGY-SZSHSDZDH-2025110051x1","price":4.2,"currency_code":"USD","in_stock":true},{"title":"LMK12UU - 12mm x 21mm x 30mm","offer_id":52448899399954,"sku":"AATYHGY-SZSHSDZDH-2025110052x1","price":4.39,"currency_code":"USD","in_stock":true},{"title":"LMK13UU - 13mm x 23mm x 32mm","offer_id":52448899432722,"sku":"AATYHGY-SZSHSDZDH-2025110053x1","price":5.43,"currency_code":"USD","in_stock":true},{"title":"LMK16UU - 16mm x 28mm x 37mm","offer_id":52448899465490,"sku":"AATYHGY-SZSHSDZDH-2025110054x1","price":6.24,"currency_code":"USD","in_stock":true},{"title":"LMK20UU - 20mm x 32mm x 42mm","offer_id":52448899498258,"sku":"AATYHGY-SZSHSDZDH-2025110055x1","price":8.04,"currency_code":"USD","in_stock":true},{"title":"LMK25UU - 25mm x 40mm x 59mm","offer_id":52448899531026,"sku":"AATYHGY-SZSHSDZDH-2025110056x1","price":14.55,"currency_code":"USD","in_stock":true},{"title":"LMK30UU - 30mm x 45mm x 64mm","offer_id":52448899563794,"sku":"AATYHGY-SZSHSDZDH-2025110057x1","price":17.73,"currency_code":"USD","in_stock":true},{"title":"LMK35UU - 35mm x 52mm x 70mm","offer_id":52448899596562,"sku":"AATYHGY-SZSHSDZDH-2025110058x1","price":25.85,"currency_code":"USD","in_stock":true},{"title":"LMK40UU - 40mm x 60mm x 80mm","offer_id":52448899629330,"sku":"AATYHGY-SZSHSDZDH-2025110059x1","price":39.21,"currency_code":"USD","in_stock":true},{"title":"LMK50UU - 50mm x 80mm x 100mm","offer_id":52448899662098,"sku":"AATYHGY-SZSHSDZDH-2025110060x1","price":90.4,"currency_code":"USD","in_stock":true},{"title":"LMK60UU - 60mm x 90mm x 110mm","offer_id":52448899694866,"sku":"AATYHGY-SZSHSDZDH-2025110061x1","price":116.01,"currency_code":"USD","in_stock":true},{"title":"LMK6UU - 6mm x 12mm x 19mm (Nickel Plating)","offer_id":52448899727634,"sku":"AATYHGY-SZSHSDZDH-2025110063x1","price":2.92,"currency_code":"USD","in_stock":true},{"title":"LMK8UU - 8mm x 15mm x 24mm (Nickel Plating)","offer_id":52448899760402,"sku":"AATYHGY-SZSHSDZDH-2025110064x1","price":3.26,"currency_code":"USD","in_stock":true},{"title":"LMK10UU - 10mm x 19mm x 29mm (Nickel Plating)","offer_id":52448899793170,"sku":"AATYHGY-SZSHSDZDH-2025110065x1","price":4.26,"currency_code":"USD","in_stock":true},{"title":"LMK12UU - 12mm x 21mm x 30mm (Nickel Plating)","offer_id":52448899825938,"sku":"AATYHGY-SZSHSDZDH-2025110066x1","price":4.45,"currency_code":"USD","in_stock":true},{"title":"LMK13UU - 13mm x 23mm x 32mm (Nickel Plating)","offer_id":52448899858706,"sku":"AATYHGY-SZSHSDZDH-2025110067x1","price":5.74,"currency_code":"USD","in_stock":true},{"title":"LMK16UU - 16mm x 28mm x 37mm (Nickel Plating)","offer_id":52448899891474,"sku":"AATYHGY-SZSHSDZDH-2025110068x1","price":6.53,"currency_code":"USD","in_stock":true},{"title":"LMK20UU - 20mm x 32mm x 42mm (Nickel Plating)","offer_id":52448899924242,"sku":"AATYHGY-SZSHSDZDH-2025110069x1","price":8.13,"currency_code":"USD","in_stock":true},{"title":"LMK25UU - 25mm x 40mm x 59mm (Nickel Plating)","offer_id":52448899957010,"sku":"AATYHGY-SZSHSDZDH-2025110070x1","price":14.96,"currency_code":"USD","in_stock":true},{"title":"LMK30UU - 30mm x 45mm x 64mm (Nickel Plating)","offer_id":52448899989778,"sku":"AATYHGY-SZSHSDZDH-2025110071x1","price":18.03,"currency_code":"USD","in_stock":true},{"title":"LMK35UU - 35mm x 52mm x 70mm (Nickel Plating)","offer_id":52448900022546,"sku":"AATYHGY-SZSHSDZDH-2025110072x1","price":26.47,"currency_code":"USD","in_stock":true},{"title":"LMK40UU - 40mm x 60mm x 80mm (Nickel Plating)","offer_id":52448900055314,"sku":"AATYHGY-SZSHSDZDH-2025110073x1","price":40.96,"currency_code":"USD","in_stock":true},{"title":"LMK50UU - 50mm x 80mm x 100mm (Nickel Plating)","offer_id":52448900088082,"sku":"AATYHGY-SZSHSDZDH-2025110074x1","price":93.17,"currency_code":"USD","in_stock":true},{"title":"LMK60UU - 60mm x 90mm x 110mm (Nickel Plating)","offer_id":52448900120850,"sku":"AATYHGY-SZSHSDZDH-2025110075x1","price":119.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0884\/8936\/1682\/files\/1e603986-71ef-4e3c-aa05-b6f6191951f8.jpg?v=1783687284","url":"https:\/\/homediyer.com\/products\/lmk-linear-square-flange-mount-bearing-bushing-6-60mm","provider":"HomeDIYer","version":"1.0","type":"link"}