{"product_id":"3-inch-6061-t6-aluminum-round-bar-55-75mm-solid-billet-stock","title":"3 Inch 6061-T6 Aluminum Round Bar, 55–75mm Solid Billet","description":"\u003cstyle\u003e\n  .rk-wrap{max-width:1080px;margin:0 auto;padding:8px 14px 28px;font-family:-apple-system,BlinkMacSystemFont,\"Segoe UI\",Roboto,Helvetica,Arial,sans-serif;color:#1f2d2f;line-height:1.7;font-size:16px;box-sizing:border-box}\n  .rk-wrap *,.rk-wrap *:before,.rk-wrap *:after{box-sizing:border-box}\n  .rk-title{font-size:clamp(22px,3.2vw,32px);line-height:1.3;font-weight:800;color:#005969;margin:10px 0 14px}\n  .rk-lead{font-size:clamp(15px,1.6vw,17px);margin:0 0 16px}\n  .rk-sub{font-size:clamp(17px,2vw,20px);font-weight:700;color:#005969;margin:26px 0 10px}\n  .rk-p{margin:0 0 14px}\n  .rk-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:16px 0 8px}\n  .rk-card{background:#f3fafb;border:1px solid #d7eef2;border-radius:10px;padding:16px}\n  .rk-card b{display:block;color:#005969;font-size:15px;margin-bottom:6px}\n  .rk-card span{font-size:14px;color:#3a4c4f}\n  .rk-box{background:#f8fcfd;border-left:4px solid #00AAFF;border-radius:8px;padding:14px 18px;margin:14px 0}\n  .rk-chips{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 6px}\n  .rk-chips span{background:#e6f6fb;border:1px solid #bfe6f0;color:#005969;border-radius:999px;padding:6px 12px;font-size:13.5px;font-weight:600}\n  .rk-list{margin:6px 0 0;padding-left:20px}\n  .rk-list li{margin-bottom:6px}\n  .rk-faq{background:#f8fcfd;border:1px solid #d7eef2;border-radius:10px;padding:6px 18px;margin:12px 0}\n  .rk-faq p{margin:10px 0;font-size:15px}\n  .rk-ship{background:#005969;color:#fff;border-radius:10px;padding:16px 18px;margin:22px 0 10px}\n  .rk-ship b{color:#bfefff;font-size:15px;display:block;margin-bottom:6px}\n  .rk-ship p{margin:0 0 6px;font-size:14.5px}\n  .rk-close{font-weight:600;color:#005969;margin-top:18px}\n  .rk-related{font-size:14.5px;color:#3a4c4f;margin-top:16px}\n  @media (max-width:768px){\n    .rk-grid{grid-template-columns:repeat(2,1fr)}\n    .rk-wrap{font-size:15px}\n  }\n  @media (max-width:480px){\n    .rk-grid{grid-template-columns:1fr}\n    .rk-card{padding:14px}\n    .rk-wrap{padding:6px 10px 22px}\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"rk-wrap\"\u003e\n\u003cp class=\"rk-title\"\u003e3 Inch 6061-T6 Aluminum Round Bar, 55–75mm Solid Billet\u003c\/p\u003e\n\u003cp class=\"rk-lead\"\u003eThis collection covers \u003cstrong\u003e3 inch 6061 aluminum round bar\u003c\/strong\u003e and the heavy section band from 55mm to 75mm: solid, T6 heat-treated bar that doubles as small billet stock. These diameters are chosen for heavy spindles, large rollers, pump and valve bodies, thick flanges, and mold blocks — parts that start from a substantial chunk of solid aluminum.\u003c\/p\u003e\n\u003cp class=\"rk-lead\"\u003eEvery length is true solid \u003cstrong\u003e6061 aluminum rod\u003c\/strong\u003e — never tube, never cast — sawn or cut to length and ready for heavy turning, deep boring, facing, and pocket milling. Choose the diameter that matches your drawing and order stock lengths, sawn blanks, or custom-cut \u003cstrong\u003ealuminum bar stock\u003c\/strong\u003e from RapidKeen.\u003c\/p\u003e\n\u003cdiv class=\"rk-grid\"\u003e\n\u003cdiv class=\"rk-card\"\u003e\n\u003cb\u003eDiameters\u003c\/b\u003e\u003cspan\u003e55mm–75mm solid round, incl 2-1\/2 and 3 inch-class sizes\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rk-card\"\u003e\n\u003cb\u003eAlloy \u0026amp; Temper\u003c\/b\u003e\u003cspan\u003e6061-T6, solution heat treated and artificially aged\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rk-card\"\u003e\n\u003cb\u003eForm\u003c\/b\u003e\u003cspan\u003eSolid round bar \/ small billet, never hollow tube or casting\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rk-card\"\u003e\n\u003cb\u003eLength\u003c\/b\u003e\u003cspan\u003eStock lengths, sawn blanks, or cut to your custom length\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp class=\"rk-sub\"\u003eAvailable Diameters in This Collection\u003c\/p\u003e\n\u003cdiv class=\"rk-box\"\u003e\n\u003cul class=\"rk-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-1\/2 inch class (55–63mm) 6061-T6 round bar\u003c\/strong\u003e — heavy shafts, thick sleeves, and medium roller bodies\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e64mm–70mm 6061-T6 round bar\u003c\/strong\u003e — large hubs, sheave blanks, and heavy coupling bodies\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3 inch class (71–75mm) 6061-T6 aluminum round bar\u003c\/strong\u003e — the lead size: heavy spindles, large flanges, and mold-tool blocks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp class=\"rk-sub\"\u003eWhy Engineers Specify Heavy 6061 Sections\u003c\/p\u003e\n\u003cp class=\"rk-p\"\u003eAt 55–75mm, the design goal shifts from trimming a shaft down to building a rigid component out of a solid block. A 3 inch 6061 aluminum round bar provides the cross section to bore a large central hole, turn concentric shoulders, drill bolt circles, and mill pockets while the part stays fixtured on its own mass. In the T6 temper it delivers serious stiffness and load capacity at roughly one third the density of steel, which is why builders replace steel spindles, housings, and tooling plates with machined 6061 to cut rotating weight and inertia. Solid bar also beats castings for predictable machining behavior and consistent response to welding and anodizing, while 6061's corrosion resistance handles washdown, outdoor, and marine-adjacent service.\u003c\/p\u003e\n\u003cp class=\"rk-sub\"\u003eCommon Applications\u003c\/p\u003e\n\u003cdiv class=\"rk-chips\"\u003e\n\u003cspan\u003eHeavy spindles \u0026amp; axles\u003c\/span\u003e\u003cspan\u003eLarge rollers \u0026amp; drums\u003c\/span\u003e\u003cspan\u003ePump \u0026amp; valve bodies\u003c\/span\u003e\u003cspan\u003eHeavy flanges\u003c\/span\u003e\u003cspan\u003eMold \u0026amp; die blocks\u003c\/span\u003e\u003cspan\u003eGear \u0026amp; sheave blanks\u003c\/span\u003e\u003cspan\u003eCylinder \u0026amp; piston parts\u003c\/span\u003e\u003cspan\u003eBearing housings\u003c\/span\u003e\u003cspan\u003ePress \u0026amp; fixture tooling\u003c\/span\u003e\u003cspan\u003eThick bushings \u0026amp; sleeves\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"rk-sub\"\u003eWhat This Range Is Used For\u003c\/p\u003e\n\u003cdiv class=\"rk-box\"\u003e\n\u003cul class=\"rk-list\"\u003e\n\u003cli\u003eHeavy drive spindles, large axles, and load shafts for industrial equipment\u003c\/li\u003e\n\u003cli\u003eConveyor and process rollers, drums, and roller center bodies turned from solid\u003c\/li\u003e\n\u003cli\u003ePump bodies, valve bodies, impeller hubs, and rotating-equipment components\u003c\/li\u003e\n\u003cli\u003eThick mounting flanges, bolt-circle bases, and heavy adapter plates\u003c\/li\u003e\n\u003cli\u003eMold and die blocks, cavity inserts, and press-tool components\u003c\/li\u003e\n\u003cli\u003eLarge gear, pulley, and sheave blanks with deep bores and keyways\u003c\/li\u003e\n\u003cli\u003eCylinder component blanks, piston-related parts, and gland bodies\u003c\/li\u003e\n\u003cli\u003eBearing housings, thick bushings, sleeves, and heavy fixture tooling\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cp class=\"rk-sub\"\u003eMachining, Welding \u0026amp; Finishing\u003c\/p\u003e\n\u003cp class=\"rk-p\"\u003eHeavy 6061-T6 aluminum round bar is made for aggressive stock removal: facing large ends, rough and finish boring, stepped and contoured turning, and deep pocket milling all run with light, continuous chips, so a 3 inch billet reaches finished shape far faster than the same part in steel. The generous cross section supports concentric boring, annular grooves, cross-holes, and dense bolt patterns from a single fixturing. It welds by MIG or TIG with 6061 or 4043 filler, noting the usual local reduction of T6 strength near the weld, and it finishes by bead blasting, brushing, polishing, powder coating, or clear and colored anodizing with even results across the large surface.\u003c\/p\u003e\n\u003cp class=\"rk-sub\"\u003eIndustries That Buy This Range\u003c\/p\u003e\n\u003cdiv class=\"rk-chips\"\u003e\n\u003cspan\u003eHeavy CNC machining\u003c\/span\u003e\u003cspan\u003eMold \u0026amp; tool making\u003c\/span\u003e\u003cspan\u003ePumps \u0026amp; rotating equipment\u003c\/span\u003e\u003cspan\u003eHydraulics \u0026amp; fluid power\u003c\/span\u003e\u003cspan\u003eConveyors \u0026amp; processing lines\u003c\/span\u003e\u003cspan\u003ePackaging machinery\u003c\/span\u003e\u003cspan\u003eMarine \u0026amp; offshore support\u003c\/span\u003e\u003cspan\u003eMaintenance \u0026amp; repair (MRO)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp class=\"rk-sub\"\u003eOrdering, Sawing \u0026amp; Cut Length\u003c\/p\u003e\n\u003cp class=\"rk-p\"\u003eChoose any diameter from 55mm to 75mm, or the 2-1\/2 and 3 inch-class fractional sizes, then enter the length you need. This 6061 aluminum round bar is supplied as full stock lengths, sawn billet blanks close to finished size, or single cut pieces for emergency repairs. Heavy sections are sawn square and packed to protect the surface; both one-off blanks and production quantities of aluminum bar stock are available.\u003c\/p\u003e\n\u003cp class=\"rk-sub\"\u003eQuick Questions\u003c\/p\u003e\n\u003cdiv class=\"rk-faq\"\u003e\n\u003cp\u003e\u003cstrong\u003eIs this bar or billet?\u003c\/strong\u003e Solid extruded 6061-T6 round bar in heavy sections, which is used exactly like small billet stock for parts machined from solid.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e3 inch class or move to the extra-large range?\u003c\/strong\u003e Stay at 3 inch class (55–75mm) for standard heavy spindles and housings; move to the \u003ca href=\"https:\/\/rapidkeen.com\/products\/large-diameter-6061-t6-aluminum-round-bar-80-100mm-solid-billet-blanks\" title=\"Large diameter 6061 aluminum billet 80–100mm\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"color: #005969;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003e80–100mm extra-large bar, billet \u0026amp; round blank collection\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e for oversized mold blocks and heavy flanges.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be supplied pre-sawn?\u003c\/strong\u003e Yes. Order sawn blanks at your rough length and finish machine in-house, or request cut-to-length pieces.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSolid or hollow?\u003c\/strong\u003e Fully solid round stock throughout — never tube, pipe, or casting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rk-ship\"\u003e\n\u003cb\u003eShipping \u0026amp; Lead Time\u003c\/b\u003e\n\u003cp\u003eIn-stock, standard 3 inch 6061-T6 aluminum round bar and 55–75mm solid billet are prepared and shipped within \u003cstrong\u003e1–5 business days\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003eCustom-cut or processed orders require extra time based on processing complexity; the exact lead time depends on the size and quantity ordered.\u003c\/p\u003e\n\u003cp\u003eAfter shipment, delivery to US addresses typically takes \u003cstrong\u003e7–15 days\u003c\/strong\u003e, and a tracking number is provided as soon as the order leaves our warehouse.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp class=\"rk-related\"\u003eView \u003ca href=\"https:\/\/rapidkeen.com\/products\/6061-t6-aluminum-round-bar\" title=\"View all 6061-T6 aluminum round bar sizes\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"color: #005969;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003eall sizes\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e. Adjacent: the \u003ca href=\"https:\/\/rapidkeen.com\/products\/2-inch-6061-t6-aluminum-round-bar-26-50mm-solid-bar-stock\" title=\"2 inch 6061-T6 aluminum round bar 26–50mm\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"color: #005969;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003e26–50mm (2 inch class) collection\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e below and the \u003ca href=\"https:\/\/rapidkeen.com\/products\/large-diameter-6061-t6-aluminum-round-bar-80-100mm-solid-billet-blanks\" title=\"Large diameter 6061 aluminum billet 80–100mm\" target=\"_blank\" rel=\"noopener\"\u003e\u003cspan style=\"color: #005969;\"\u003e\u003cspan style=\"text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;\"\u003e\u003cb\u003e\u003cu\u003e80–100mm billet \u0026amp; round blank collection\u003c\/u\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/a\u003e above.\u003c\/p\u003e\n\u003cp class=\"rk-close\"\u003eFor heavy spindles, rollers, housings, and mold blocks, the 3 inch 6061 aluminum round bar collection across 55–75mm supplies solid T6 billet stock — sawn or cut to your length and ready for serious machining.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"RapidKeen","offers":[{"title":"55.0 mm (2.165 in) \/ 200 mm (7.87 in)","offer_id":44108047155259,"sku":null,"price":36.0,"currency_code":"USD","in_stock":true},{"title":"55.0 mm (2.165 in) \/ 500 mm (19.7 in)","offer_id":44108047188027,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false},{"title":"60.0 mm (2.36 in) \/ 200 mm (7.87 in)","offer_id":44108047220795,"sku":null,"price":42.0,"currency_code":"USD","in_stock":true},{"title":"60.0 mm (2.36 in) \/ 500 mm (19.7 in)","offer_id":44108047253563,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false},{"title":"65.0 mm (2.56 in) \/ 200 mm (7.87 in)","offer_id":44108047286331,"sku":null,"price":48.0,"currency_code":"USD","in_stock":true},{"title":"65.0 mm (2.56 in) \/ 500 mm (19.7 in)","offer_id":44108047319099,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false},{"title":"70.0 mm (2.76 in) \/ 200 mm (7.87 in)","offer_id":44108047351867,"sku":null,"price":49.9,"currency_code":"USD","in_stock":true},{"title":"70.0 mm (2.76 in) \/ 500 mm (19.7 in)","offer_id":44108047384635,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false},{"title":"75.0 mm (3 in) \/ 200 mm (7.87 in)","offer_id":44108047417403,"sku":null,"price":56.0,"currency_code":"USD","in_stock":true},{"title":"75.0 mm (3 in) \/ 500 mm (19.7 in)","offer_id":44108047450171,"sku":null,"price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4473\/6059\/files\/3-inch-6061-aluminum-billet-rollers-housings.webp?v=1788599922","url":"https:\/\/rapidkeen.com\/products\/3-inch-6061-t6-aluminum-round-bar-55-75mm-solid-billet-stock","provider":"RapidKeen","version":"1.0","type":"link"}