{"product_id":"the-corner-stone-aluminum-extrusion-corner-bracket","title":"The Corner Stone | 6063-T5 Aluminum Extrusion Corner Bracket","description":"\u003cdiv class=\"product-narrative\"\u003e\n\u003cp\u003eEvery aluminum frame starts as a pile of straight lines. What turns those lines into a machine, a bench, a gantry or a safety enclosure is the corner, and the corner is where cheap builds fail first. A squared end butted against another squared end holds nothing but friction and hope. The bracket is the part that decides whether the frame stays a rectangle under load or slowly becomes a parallelogram.\u003c\/p\u003e\n\u003cp\u003eThis is a vertical rectangular corner in 6063-T5 aluminum, anodized after machining. The alloy is the one extrusion profiles themselves are made from, which is why thermal expansion across the joint stays matched and why a frame assembled in a cold workshop does not loosen in a warm one. The gusset form carries the load as a web between two faces instead of through the bolt holes alone, so the bolt clamps the joint and the web resists the racking force. That is the whole mechanical argument for a bracket over a butt joint.\u003c\/p\u003e\n\u003cp\u003eThe range covers the profiles people actually build with: 2020, 3030, 4040, 4545, 6060, 8080, 9090 and 100100. Each size is machined for its own slot geometry rather than being a scaled drawing, because a bracket that fits a 20 series slot cleanly will not seat on a 40 series profile without play. The anodized finish is a working surface, not a cosmetic one: it resists the light abrasion of a workshop, keeps the joint from galling when it is dismantled and reassembled, and stays electrically insulating where the frame carries sensors and wiring.\u003c\/p\u003e\n\u003cp\u003eThe one thing worth reading twice is what the price covers. It is an individual corner piece. Nuts and screws are not in the box, because builders on this scale already buy fasteners by the hundred and resent paying for two bolts per bracket. Buy the T-nuts and the cap-head screws that match your profile, decide early whether the frame is a permanent weldment or a fixture you will reconfigure, and the corner stops being a line item and becomes the reason the frame is still square in five years.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eStraight lines are easy. A corner is where a builder tells the truth.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-features\"\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul style=\"list-style:none;padding:0;\"\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003e6063-T5 aluminum\u003c\/strong\u003e The same alloy as the extrusion it clamps, so the joint moves with the frame instead of fighting it.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eAnodized after machining\u003c\/strong\u003e A hard, electrically insulating surface that resists galling when the joint is broken down and rebuilt.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eVertical rectangular gusset\u003c\/strong\u003e A machined web across both faces resists racking, which is the failure mode a butt joint cannot survive.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eEight profile sizes\u003c\/strong\u003e 2020, 3030, 4040, 4545, 6060, 8080, 9090 and 100100, each cut for its own slot geometry.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eLoad spread across two faces\u003c\/strong\u003e The bolt clamps; the web carries. Force leaves the joint through the bracket instead of through the fastener.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eSold as single pieces\u003c\/strong\u003e Buy one for a repair or a hundred for a production run, without a minimum order sitting behind it.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eFasteners excluded by design\u003c\/strong\u003e Nuts and screws are not bundled, because builders at this scale already buy them in bulk.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eRebuildable\u003c\/strong\u003e Loosen, realign, retighten. Nothing in the joint is welded, pressed or single-use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-specs\"\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul style=\"list-style:none;padding:0;\"\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 6063-T5 aluminum\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eFinish:\u003c\/strong\u003e Anodized, clear\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eForm:\u003c\/strong\u003e Vertical rectangular corner with internal gusset web\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eProfile sizes:\u003c\/strong\u003e 2020, 3030, 4040, 4545, 6060, 8080, 9090, 100100\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eFixing method:\u003c\/strong\u003e T-nuts and cap-head screws into the profile slot\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eFasteners included:\u003c\/strong\u003e No. Nuts and screws sold separately\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eUnit price covers:\u003c\/strong\u003e One corner piece, without nuts or screws\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eSlot bolt guidance:\u003c\/strong\u003e M5 on 20 series, M6 on 30 and 40 series, M8 on the larger profiles\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eSurface conductivity:\u003c\/strong\u003e Electrically insulating when anodized\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eTolerance:\u003c\/strong\u003e Machined to the nominal profile, squared to the joint face\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eWorking environment:\u003c\/strong\u003e Indoor workshop, machine frame, enclosure, lab fixture\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eReuse:\u003c\/strong\u003e Fully demountable without damage to bracket or profile\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-applications\"\u003e\n\u003ch3\u003eWhere It Belongs\u003c\/h3\u003e\n\u003cp\u003eThis is the part for the person building the frame rather than buying it: the CNC enclosure, the 3D printer gantry, the test rig, the workbench, the camera rail, the extraction hood, the light truss over a bench. It suits automation cells that get reconfigured every few months because the joint comes apart cleanly. It also suits the one-off repair where a single corner on a purchased frame has cracked and the whole assembly is too expensive to replace.\u003c\/p\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-faq\"\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Are nuts and screws included?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: No. The price covers the corner piece only, which is stated on the listing and is deliberate. You need T-nuts and cap-head screws matched to your profile slot; most builders already hold both.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Which bolt size do I need?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Follow the slot. The 20 series takes M5, the 30 and 40 series take M6, and the 45 series and above take M8. If the profile came from a different supplier, check the slot width rather than assuming the series number settles it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will it fit my extrusion if I did not buy the profile here?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Almost certainly, if the profile is a standard T-slot. These brackets are machined to the common slot geometry across the 20, 30, 40, 45, 60, 80, 90 and 100 series, which is shared by most suppliers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How many brackets does a frame need?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: One per corner, so four for a single rectangle and eight for a box. Long spans and cantilevers usually want an extra pair at the mid-span joint, and any frame carrying a motor wants all eight.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is 6063-T5 strong enough for a machine frame?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: For static and light dynamic loads, yes. It is the alloy the extrusion is made from, so the frame behaves as one material rather than two. For high-vibration or safety-critical structures, add diagonal bracing instead of leaning on a thicker corner.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse them?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: Yes. Nothing in the joint is welded or pressed, so the bracket comes off with the same two bolts that put it on. That is the reason to keep the fasteners in a labelled bin.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:15px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the anodized finish scratch?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA: It resists workshop abrasion well, but it is a surface, not armour. A scratched bracket is still structurally sound and still electrically insulating at the joint face.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-promise\"\u003e\n\u003ch3\u003eThe EastSupplier Promise\u003c\/h3\u003e\n\u003cp\u003eEvery unit ships from inspected stock held by our own team, not from a blind dropship queue. Orders placed before 3pm warehouse time leave the same working day, and each parcel carries a tracking number you can follow from dispatch to doorstep. If a unit arrives damaged or does not match this listing, we replace or refund it inside 30 days.\u003c\/p\u003e\n\u003cul style=\"list-style:none;padding:0;\"\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eStock checked daily:\u003c\/strong\u003e the inventory figure on this page is live, not a placeholder.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eTechnical answers in English:\u003c\/strong\u003e a human replies to product questions within one business day.\u003c\/li\u003e\n\u003cli style=\"padding:8px 0;border-bottom:1px solid #f0f0f0;\"\u003e\n\u003cstrong\u003eNo surprise fees:\u003c\/strong\u003e the price you see is the price at checkout.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\u003cdiv class=\"product-gallery\" style=\"margin-top:30px;text-align:center;\"\u003e\n\u003cimg 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