{"product_id":"value-collection-429-4003-3-inch-4-jaw-lathe-chuck","title":"Value Collection 429-4003 3 Inch 4 Jaw Lathe Chuck","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VALUE COLLECTION 429-4003 is a 3-inch, 4-jaw independent manual lathe chuck with a plain back mount, built for precision workholding on metal lathes. Constructed from cast iron, this chuck provides the rigidity needed to hold irregularly shaped or non-concentric workpieces. Each jaw adjusts independently, allowing operators to precisely center stock that a self-centering chuck cannot grip accurately. The through-hole diameter measures 0.8661 inches (22 mm), accommodating bar stock fed through the spindle. Two sets of hard solid one-piece jaws are included. Machinists and toolroom technicians rely on this type of chuck for custom setups, off-center turning, and second-operation work.\u003c\/p\u003e\n\u003cp\u003eThis chuck is suited for manual lathe applications in machine shops, maintenance facilities, and toolrooms where independent jaw control is required. The plain back mount design means the chuck is intended to be fitted to a lathe backplate matched to the spindle nose of the target machine. It is appropriate for both production and job-shop environments handling ferrous and non-ferrous workpieces that require deliberate, individual jaw positioning. The body length of 1-21\/32 inches keeps the chuck compact relative to its 3-inch diameter, reducing overhang and improving rigidity during cuts.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e4 independently adjustable jaws for precise centering of irregular or non-concentric workpieces\u003c\/li\u003e\n  \u003cli\u003e3-inch (80 mm) chuck diameter in a compact cast iron body\u003c\/li\u003e\n  \u003cli\u003ePlain back mount for fitment to a custom or machine-specific backplate\u003c\/li\u003e\n  \u003cli\u003eThrough-hole diameter of 0.8661 inches (22 mm) for bar stock pass-through\u003c\/li\u003e\n  \u003cli\u003eIncludes two sets of hard solid one-piece, non-reversible jaws\u003c\/li\u003e\n  \u003cli\u003eBody length of 1-21\/32 inches for reduced spindle overhang\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style plain back mount lathe chuck intended for fitment to a machinist-supplied or machine-specific backplate; confirm spindle nose type and backplate bore before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation of a plain back lathe chuck requires a backplate bored and threaded to match the lathe spindle nose; this work is typically performed by a qualified machinist. Power down and lock out the lathe before mounting or removing the chuck. Verify chuck mounting bolts are torqued evenly and that the chuck runs within acceptable runout tolerance before cutting. Jaw slots should be kept clean and lightly lubricated to maintain smooth independent jaw movement.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChuck Diameter\u003c\/strong\u003e: 3 inches (80 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Jaws\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChuck Type\u003c\/strong\u003e: Independent\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMount Type\u003c\/strong\u003e: Plain Back\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Material\u003c\/strong\u003e: Cast Iron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 1-21\/32 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJaw Height\u003c\/strong\u003e: 1\/2 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eJaw Style\u003c\/strong\u003e: One-Piece, Non-Reversible\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThrough-Hole Diameter\u003c\/strong\u003e: 0.8661 inches (22 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContents\u003c\/strong\u003e: 2 sets of hard solid jaws\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 16 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: VALUE COLLECTION\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 429-4003\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VALUE COLLECTION","offers":[{"title":"Default Title","offer_id":51716572578098,"sku":"429-4003","price":452.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/c1a3120533118bc5f0805f30cd3dbfd8.jpg?v=1788528134","url":"https:\/\/voomisupply.com\/products\/value-collection-429-4003-3-inch-4-jaw-lathe-chuck","provider":"Voomi Supply","version":"1.0","type":"link"}