{"product_id":"milwaukee-48-20-4400-spline-rotary-hammer-drill-bit","title":"Milwaukee 48-20-4400 Spline Rotary Hammer Drill Bit","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe MILWAUKEE 48-20-4400 is a spline-shank rotary hammer drill bit engineered for drilling into brick, block, concrete, and reinforced concrete. It uses a 4-cutter tip with a 4 x 90-degree geometry that reduces lock-up when the bit contacts rebar. The patented rebar chamfers extend service life under demanding field conditions. A high-volume flute design moves debris out of the hole quickly, keeping the cutting tip cool and reducing bit walking. This bit is installed by licensed contractors, concrete specialists, and experienced tradespeople working on structural or masonry drilling applications.\u003c\/p\u003e\u003cp\u003eThis bit is suited for residential and commercial masonry work where spline-drive rotary hammers are the standard tool of choice. It delivers a 17-inch drilling depth with a 22-inch overall length, giving adequate reach for through-slab and deep anchor applications. The 1-1\/4-inch diameter accommodates common anchor bolt and conduit sleeve hole requirements on job sites. Applications include concrete formwork, anchor setting, core layout, and reinforced slab penetration.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e4-cutter tip with 4 x 90-degree geometry resists lock-up in rebar\u003c\/li\u003e\n\u003cli\u003ePatented rebar chamfers increase cutting edge durability\u003c\/li\u003e\n\u003cli\u003eHigh-volume flute promotes fast debris evacuation from the hole\u003c\/li\u003e\n\u003cli\u003e1-1\/4-inch cutting diameter suitable for anchor and sleeve installations\u003c\/li\u003e\n\u003cli\u003eSpline shank for secure chuck engagement in spline-drive rotary hammers\u003c\/li\u003e\n\u003cli\u003e17-inch usable drilling depth with 22-inch overall length for deep-reach applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with spline-drive rotary hammer tools. Compatible with rotary hammers equipped with a spline chuck interface, which is common on mid- to heavy-duty hammer drills used in commercial and industrial masonry work.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis bit is installed and operated by qualified tradespeople familiar with rotary hammer equipment and masonry drilling procedures. Confirm the rotary hammer is set to the correct mode (rotary hammer, not rotation-only) before drilling into concrete or reinforced masonry. Always wear appropriate PPE including eye protection and hearing protection. Inspect the bit shank and cutting edges for wear or damage before each use and replace if chipping or deformation is observed.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 1-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 22 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrilling Depth\u003c\/strong\u003e: 17 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Spline\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutter Count\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 2.99 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUOM\u003c\/strong\u003e: Each\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: MILWAUKEE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 48-20-4400\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MILWAUKEE","offers":[{"title":"Default Title","offer_id":51346773573938,"sku":"48-20-4400","price":98.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/310512160.jpg?v=1782089913","url":"https:\/\/voomisupply.com\/products\/milwaukee-48-20-4400-spline-rotary-hammer-drill-bit","provider":"Voomi Supply","version":"1.0","type":"link"}