{"product_id":"allied-machine-21841-0004-indexable-spade-drill-4mt-taper","title":"Allied Machine 21841-0004 Indexable Spade Drill 4MT Taper","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ALLIED MACHINE AND ENGINEERING 21841-0004 is an indexable spade drill designed for high-performance metal removal in machining operations. It accepts interchangeable spade blade inserts and uses a 4MT taper shank with a shank diameter of 1.231 inches, making it compatible with standard Morse taper spindles and drill press setups. The drill covers a diameter range of 2 to 2-7\/8 inches with a maximum drill depth of 9 inches. Through-coolant delivery via two radial entry ports keeps cutting temperatures controlled and helps clear chips from deep-hole applications. The overall length measures 15-9\/16 inches. This tool is installed by machinists and toolroom technicians in production and job-shop environments.\u003c\/p\u003e\n\u003cp\u003eThis spade drill is suited for use on CNC machining centers, drill presses, and lathes equipped with 4MT taper toolholding. The HP-D series designation indicates a high-performance design rated for universal workpiece materials, including cast iron, steel, stainless, aluminum, and nonferrous alloys. The straight flute configuration provides clean chip evacuation and stable drilling geometry across the full 9-inch flute length. Radial coolant ports thread to 1\/4 inch NPT and are compatible with the 2T-4SR rotary coolant adapter for pressurized through-coolant systems.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eDiameter range of 2 to 2-7\/8 inches accommodates multiple spade blade sizes within a single holder body\u003c\/li\u003e\n  \u003cli\u003eThrough-coolant design with 2-radial entry ports and 1\/4 inch NPT coolant hole threads for chip flushing and heat control\u003c\/li\u003e\n  \u003cli\u003e4MT taper shank with 1.231-inch shank diameter fits standard Morse taper spindles\u003c\/li\u003e\n  \u003cli\u003eStraight flute geometry with 9-inch flute length supports deep-hole drilling to 9 inches maximum depth\u003c\/li\u003e\n  \u003cli\u003eSteel body construction in the HP-D series rated for high-performance cutting across universal workpiece materials\u003c\/li\u003e\n  \u003cli\u003eCompatible with 2T-4SR rotary coolant adapter for pressurized coolant delivery\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eRated for universal primary workpiece materials including cast iron, steel, stainless, aluminum, and nonferrous alloys (material codes K, M, N, P). Compatible with the 2T-4SR rotary coolant adapter. Designed for machines equipped with a 4MT taper spindle. Spade blade inserts are sold separately.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and tool changes must be performed by qualified machinists or toolroom personnel with the machine powered down and the spindle fully locked. Verify that the taper bore is clean and free of chips or burrs before seating the shank to ensure full contact and accurate runout. Coolant lines should be pressure-tested at the adapter connection before initiating a drilling cycle. Follow the machine manufacturer guidelines and applicable shop safety procedures when setting feeds and speeds for the selected workpiece material.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Drill Diameter\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Drill Diameter\u003c\/strong\u003e: 2-7\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Drill Depth\u003c\/strong\u003e: 9 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Length\u003c\/strong\u003e: 9 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 11-15\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e: 15-9\/16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Taper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Taper Size\u003c\/strong\u003e: 4MT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1.231 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 4-7\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Straight\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Entry Style\u003c\/strong\u003e: 2-Radial Entry\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Hole Thread Size\u003c\/strong\u003e: 1\/4 inch NPT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThrough Coolant\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRotary Coolant Adapter Compatibility\u003c\/strong\u003e: 2T-4SR\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTool Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: HP-D\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Universal (K, M, N, P)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 6.95 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ALLIED MACHINE AND ENGINEERING\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 21841-0004\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ALLIED MACHINE AND ENGINEERING","offers":[{"title":"Default Title","offer_id":51728561963314,"sku":"21841-0004","price":764.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/863bf06ac595fd890ef938900f73af07_f53ebc18-9e6e-4dd3-bd65-4b01825c65c9.jpg?v=1788693367","url":"https:\/\/voomisupply.com\/products\/allied-machine-21841-0004-indexable-spade-drill-4mt-taper","provider":"Voomi Supply","version":"1.0","type":"link"}