{"product_id":"top-tool-380mm-3-jaw-self-centering-two-piece-jaws-clamping-11p5-400mm-plain-back","title":"TOP-TOOL Professional 3-Jaw Self-Centering Lathe Chuck, 380mm \/ 15-Inch, Clamping Range 11.5–400 mm (0.45–15.75 in), Two-Piece Jaws (Master + Reversible Top Jaws), Pre-Mounted Set, T-Key, Plain Back","description":"\u003ch2\u003eProfessional 380mm \/ 15-Inch 3-Jaw Self-Centering Lathe Chuck (Two-Piece Jaws (Master + Reversible Top Jaws))\u003c\/h2\u003e\n\u003cp\u003eBuilt for \u003cstrong\u003emetal lathes, wood lathes, drill presses, milling machines, CNC machining centers, grinders\u003c\/strong\u003e, and other equipment that needs \u003cstrong\u003eself-centering workholding\u003c\/strong\u003e. The TOP-TOOL 380 mm chuck delivers rigid gripping when mounted with the correct \u003cstrong\u003eadapter plate or fixture\u003c\/strong\u003e. \u003cstrong\u003eHT300 cast iron\u003c\/strong\u003e body, \u003cstrong\u003eAISI 5140\u003c\/strong\u003e scroll and bevel gears, \u003cstrong\u003eAISI 1045\u003c\/strong\u003e jaws. \u003cstrong\u003eOverall clamping envelope 11.5–400 mm (0.45–15.75 in)\u003c\/strong\u003e across the three modes below.\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\u003eAluminum \/ 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\u003eClamping ranges\u003c\/h3\u003e\n\u003cp\u003eOutside clamping with solid outside jaws (standard setup): 11.5–210 mm gripping on the outside diameter.\u003c\/p\u003e\n\u003cp\u003eInside support \/ expanding with the same outside jaws: 95–400 mm internal gripping (boring-style holding).\u003c\/p\u003e\n\u003cp\u003eOutside clamping with solid inside (reverse) jaws: 110–400 mm for large-diameter OD work.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSummary:\u003c\/strong\u003e overall envelope \u003cstrong\u003e11.5–400 mm (0.45–15.75 in)\u003c\/strong\u003e depending on jaw configuration.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty HT300 Cast Iron:\u003c\/strong\u003e High mass and damping for large workpieces and heavy cuts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardened Scroll \u0026amp; Gears:\u003c\/strong\u003e AISI 5140 scroll (HRC 43–48) and bevel gears (HRC 45–50).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardened Jaws (HRC 52–58):\u003c\/strong\u003e AISI 1045 for grip and wear resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuaranteed Precision:\u003c\/strong\u003e Checked with \u003cstrong\u003efour different test bars\u003c\/strong\u003e as part of our acceptance process. Repeatability \u003cstrong\u003e≤0.05 mm (0.002\")\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlain Back Mount:\u003c\/strong\u003e \u003cstrong\u003eD1 = 325 mm\u003c\/strong\u003e locating register, recess depth \u003cstrong\u003eh = 7.5 mm\u003c\/strong\u003e; \u003cstrong\u003eD2 = 350 mm\u003c\/strong\u003e bolt circle; \u003cstrong\u003e3× M16\u003c\/strong\u003e mounting holes. Machine your adapter to match \u003cstrong\u003eD1\/D2\u003c\/strong\u003e. \u003cem\u003eAdapter plate not included.\u003c\/em\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwo-Piece Jaw System:\u003c\/strong\u003e Master jaws with \u003cstrong\u003ereversible top jaws\u003c\/strong\u003e pre-mounted—configure for OD or ID work per the jaw instructions. \u003cstrong\u003eNo second full jaw kit\u003c\/strong\u003e is included in the box (not the same packaging as solid-jaw models).\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eT-Key Included.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eJaw type\u003c\/h3\u003e\n\u003cp\u003eThis listing uses \u003cstrong\u003etwo-piece jaws\u003c\/strong\u003e (master jaws + top jaws). For \u003cstrong\u003esolid outside\/inside jaw sets\u003c\/strong\u003e, see our other listings.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003e\u003cem\u003eDimensions per factory charts \u003cstrong\u003eDimensions.webp\u003c\/strong\u003e \/ \u003cstrong\u003eDimensions-2.webp\u003c\/strong\u003e; clamping per \u003cstrong\u003eclamping-range\u003c\/strong\u003e chart.\u003c\/em\u003e\u003c\/p\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\u003e380 mm (14.96 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eD1 (register \/ locating recess diameter)\u003c\/td\u003e\n\u003ctd\u003e325 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eh (depth of D1 register recess)\u003c\/td\u003e\n\u003ctd\u003e7.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eD2 (bolt circle diameter)\u003c\/td\u003e\n\u003ctd\u003e350 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eD3 (through hole diameter)\u003c\/td\u003e\n\u003ctd\u003e135 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eH (total thickness: body + jaws)\u003c\/td\u003e\n\u003ctd\u003e163.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eH1 (body thickness only, excluding jaw height)\u003c\/td\u003e\n\u003ctd\u003e98 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eH2\u003c\/td\u003e\n\u003ctd\u003e103.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamping (outside jaws, standard OD)\u003c\/td\u003e\n\u003ctd\u003e11.5 – 210 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamping (inside expand, same outside jaws)\u003c\/td\u003e\n\u003ctd\u003e95 – 400 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClamping (outside with reverse jaws)\u003c\/td\u003e\n\u003ctd\u003e110 – 400 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall span (reference)\u003c\/td\u003e\n\u003ctd\u003e11.5 – 400 mm (0.45 – 15.75 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003e3× M16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRepeatability\u003c\/td\u003e\n\u003ctd\u003e≤0.05 mm (0.002\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight\u003c\/td\u003e\n\u003ctd\u003e60.0 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\u003eJaws and body are numbered (1, 2, 3) so each jaw matches its slide—faster setup and better concentricity.\u003c\/p\u003e\n\u003ch3\u003eVersatile Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal lathe:\u003c\/strong\u003e Turning, facing, drilling, boring (with correct adapter).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWood lathe:\u003c\/strong\u003e Where spindle and safety requirements allow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMilling machine \/ machining center:\u003c\/strong\u003e On suitable arbors or fixtures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrilling machine:\u003c\/strong\u003e Concentric holding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCNC:\u003c\/strong\u003e Production use where applicable.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrinder:\u003c\/strong\u003e When speed-rated and safely mounted.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility Guide\u003c\/h3\u003e\n\u003cp\u003eMachine \u003cstrong\u003eswing or envelope\u003c\/strong\u003e must clear the chuck body and fully opened jaws. Plan a comfortable margin above nominal diameter \u003cstrong\u003eD\u003c\/strong\u003e. Your adapter must match \u003cstrong\u003eD1\u003c\/strong\u003e, \u003cstrong\u003eD2\u003c\/strong\u003e, and the bolt pattern listed above.\u003c\/p\u003e\n\u003ch3\u003eMaintenance\u003c\/h3\u003e\n\u003cp\u003eClean regularly. Apply \u003cstrong\u003emolybdenum disulfide (MoS\u003csub\u003e2\u003c\/sub\u003e) grease\u003c\/strong\u003e to the scroll and bevel gears.\u003c\/p\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eNever run with the chuck key engaged. Observe safe speeds for chuck size and workpiece balance.\u003c\/p\u003e","brand":"TOP-TOOL","offers":[{"title":"Default Title","offer_id":46878834163897,"sku":null,"price":536.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0735\/9542\/0857\/files\/K11C_3213e109-9e30-470b-9338-f4ade3c93c87.png?v=1776038273","url":"https:\/\/toptool.ca\/fr\/products\/top-tool-380mm-3-jaw-self-centering-two-piece-jaws-clamping-11p5-400mm-plain-back","provider":"TOP-TOOL","version":"1.0","type":"link"}