{"product_id":"top-tool-professional-4-jaw-self-centering-lathe-chuck-80mm-3-inch-cast-iron-construction-2-63mm-clamping-range-with-internal-external-jaws-and-t-key","title":"TOP-TOOL Professional 4-Jaw Self-Centering Lathe Chuck, 80mm\/3-inch, Cast Iron Construction, 2-63mm Clamping Range with Internal External Jaws and T-Key","description":"\u003ch2\u003eProfessional 80mm \/ 3-Inch 4-Jaw Self-Centering Lathe Chuck\u003c\/h2\u003e\n\u003cp\u003eThe TOP-TOOL Professional 80mm 3-Jaw Self-Centering Lathe Chuck is precision-engineered for mini lathes and small workshops. Built with a \u003cstrong\u003eHT300 Cast Iron body\u003c\/strong\u003e and \u003cstrong\u003eAISI 5140 alloy steel scroll\u003c\/strong\u003e, it delivers superior rigidity, vibration damping, and long-term accuracy for hobbyists and machinists alike.\u003c\/p\u003e\n\u003ch3\u003ePremium Materials \u0026amp; Hardening\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eComponent\u003c\/th\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003cth\u003eHardness (HRC)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody\u003c\/td\u003e\n\u003ctd\u003eHT300 Cast Iron\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJaws\u003c\/td\u003e\n\u003ctd\u003eAISI 1045 Carbon Steel\u003c\/td\u003e\n\u003ctd\u003e52-58\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eScroll Plate\u003c\/td\u003e\n\u003ctd\u003eAISI 5140 Alloy Steel\u003c\/td\u003e\n\u003ctd\u003e43-48\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBevel Gears\u003c\/td\u003e\n\u003ctd\u003eAISI 5140 Alloy Steel\u003c\/td\u003e\n\u003ctd\u003e45-50\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack Plate\u003c\/td\u003e\n\u003ctd\u003eHT100 \/ Engineered Plastic\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHT300 Cast Iron Body:\u003c\/strong\u003e Higher-grade grey cast iron compared to standard HT200, providing superior rigidity and vibration damping for smoother cuts and better surface finishes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardened Scroll \u0026amp; Gears:\u003c\/strong\u003e AISI 5140 alloy steel scroll plate (HRC 43-48) and bevel gears (HRC 45-50) ensure smooth, precise jaw movement and long service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardened Jaws (HRC 52-58):\u003c\/strong\u003e AISI 1045 carbon steel jaws are through-hardened for maximum grip strength and wear resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuaranteed Precision:\u003c\/strong\u003e Every chuck is tested with standard test bars at 4 different diameters. Repeatability ≤0.05mm (0.002\") guaranteed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlain Back Mount:\u003c\/strong\u003e 3× M6 mounting holes. \u003cem\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Requires a separate adapter plate matched to your lathe spindle. Please verify your spindle type before ordering.\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncludes External \u0026amp; Internal Jaws:\u003c\/strong\u003e Supplied with both external jaws (2–55mm) and internal jaws for hollow workpiece gripping.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT-Key Included:\u003c\/strong\u003e Heavy-duty T-handle key. \u003cem\u003eSafety: Always remove the key before starting the lathe.\u003c\/em\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChuck Diameter (D)\u003c\/td\u003e\n\u003ctd\u003e80mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamping Range (External)\u003c\/td\u003e\n\u003ctd\u003e2 – 55mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eD2\u003c\/td\u003e\n\u003ctd\u003e66mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eD3\u003c\/td\u003e\n\u003ctd\u003e16mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody Length (H)\u003c\/td\u003e\n\u003ctd\u003e66mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eH1\u003c\/td\u003e\n\u003ctd\u003e50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJaw Step Height (h)\u003c\/td\u003e\n\u003ctd\u003e3.5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting Thread (z-d)\u003c\/td\u003e\n\u003ctd\u003e3× M6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRepeatability\u003c\/td\u003e\n\u003ctd\u003e≤0.05mm (0.002\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e1.7 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eError-Free Jaw Installation\u003c\/h3\u003e\n\u003cp\u003eEach jaw and the chuck body are marked with matching numbers (1, 2, 3). Simply align the numbered jaw with the corresponding slot on the chuck body to prevent misalignment and ensure accurate concentricity.\u003c\/p\u003e\n\u003ch3\u003eVersatile Applications\u003c\/h3\u003e\n\u003cp\u003eThis chuck is compatible with multiple machine tools:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLathe:\u003c\/strong\u003e General turning, facing, drilling, and boring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMilling Machine:\u003c\/strong\u003e Workpiece holding for milling operations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrilling Machine:\u003c\/strong\u003e Precision drilling setups\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC Machine:\u003c\/strong\u003e Light CNC turning and production work\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility Guide\u003c\/h3\u003e\n\u003cp\u003eThis 80mm chuck is ideal for \u003cstrong\u003emini lathes and benchtop lathes\u003c\/strong\u003e. \u003cbr\u003e\u003cstrong\u003eRule of Thumb:\u003c\/strong\u003e Choose a chuck where your lathe's \u003cem\u003eswing diameter is larger than the chuck's outer diameter\u003c\/em\u003e. Allow extra clearance for jaw overhang when gripping large workpieces. For an 80mm chuck, a lathe swing of ≥100mm is recommended.\u003c\/p\u003e\n\u003ch3\u003eMaintenance \u0026amp; Care\u003c\/h3\u003e\n\u003cp\u003eTo ensure longevity and smooth operation:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eClean chips and debris from the scroll and jaw slides regularly.\u003c\/li\u003e\n\u003cli\u003eLubricate the scroll plate and bevel gears with \u003cstrong\u003eMolybdenum Disulfide (MoS2) grease\u003c\/strong\u003e every few months. Avoid heavy oils that attract dust.\u003c\/li\u003e\n\u003cli\u003eStore in a dry environment to prevent rust on the precision-ground jaws.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TOP-TOOL","offers":[{"title":"Default Title","offer_id":46970222117049,"sku":"K1280","price":93.88,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/9542\/0857\/files\/K12.png?v=1776470922","url":"https:\/\/toptool.ca\/products\/top-tool-professional-4-jaw-self-centering-lathe-chuck-80mm-3-inch-cast-iron-construction-2-63mm-clamping-range-with-internal-external-jaws-and-t-key","provider":"TOP-TOOL","version":"1.0","type":"link"}