{"product_id":"jinslu-k12-250-4-jaw-self-centering-lathe-chuck-250mm-10inch","title":"JINSLU K12-250 4-Jaw Self-Centering Lathe Chuck 250mm 10\"","description":"\n\u003ch2\u003eJINSLU K12-250 Four-Jaw Self-Centering Lathe Chuck – 250mm \/ 10 Inch\u003c\/h2\u003e\n\u003cp\u003eUpgrade your lathe setup with the \u003cstrong\u003eJINSLU K12-250 Four-Jaw Self-Centering Scroll Chuck\u003c\/strong\u003e. Engineered for precision machining, this 250mm (10-inch) manual chuck features hardened steel jaws and a self-centering scroll mechanism that makes clamping square, octagonal, and round workpieces fast, accurate, and repeatable. Whether you're a professional machinist or a serious hobbyist, the K12-250 delivers the rigidity and versatility your workshop demands.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4-Jaw Self-Centering Design:\u003c\/strong\u003e Automatic centering for faster setup and consistent accuracy across a wide range of workpiece shapes.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHardened Steel Jaws:\u003c\/strong\u003e Both internal and external jaw sets are precision-hardened for long-lasting durability and reliable grip.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTwo-Piece \u0026amp; One-Piece Jaw Compatibility:\u003c\/strong\u003e Supplied with traditional two-piece jaws; Model K12 is also available with one-piece jaws (including internal and external sets).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShort Cylindrical Center Mounting:\u003c\/strong\u003e Easy, secure connection — compatible with standard 3-jaw lathe chuck mounting methods.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Clamping Range:\u003c\/strong\u003e Handles a wide variety of part sizes thanks to generous internal and external jaw clamping ranges.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManual Operation:\u003c\/strong\u003e No power source required — simple, reliable, and suitable for a broad range of lathe machines.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCustomizable:\u003c\/strong\u003e Available with optional external jaw upgrades to expand your clamping versatility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n    \u003cth style=\"text-align:left; padding:8px; border:1px solid #ddd;\"\u003eSpecification\u003c\/th\u003e\n    \u003cth style=\"text-align:left; padding:8px; border:1px solid #ddd;\"\u003eDetails\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eBrand\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eJINSLU\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eModel\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eK12-250\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eNumber of Jaws\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e4\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eChuck Diameter\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e250mm (10 inch)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eJaw Material\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eHardened Steel\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003ePower Source\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eManual\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eInternal Jaw Clamping Range (A–A1)\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e6–110mm\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eInternal Jaw Jamming Range (B–B1)\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e80–250mm\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eExternal Jaw Clamping Range (C–C1)\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e90–250mm\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eCountry of Origin\u003c\/td\u003e\n    \u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eMade in China (Mainland China)\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSelf-centering chuck body × 1\u003c\/li\u003e\n  \u003cli\u003eInside jaws × 4\u003c\/li\u003e\n  \u003cli\u003eOutside jaws (large) × 4\u003c\/li\u003e\n  \u003cli\u003eSafety chuck key × 1\u003c\/li\u003e\n  \u003cli\u003eMounting bolts × 3\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cp\u003eThe K12-250 is perfectly suited for machining \u003cstrong\u003esquare, octagonal, hexagonal, and round workpieces\u003c\/strong\u003e on manual lathes. Its self-centering scroll mechanism reduces setup time, making it an excellent choice for production runs and precision one-off parts alike.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/leather-hole-punch-tool-diy-stitching-punch-4-5-6mm\"\u003eLeather Hole Punch Tool | DIY Stitching Punch 4\/5\/6mm\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/uv-shaped-leather-groover-skiving-tool-kit-4-piece-diy\"\u003eU \u0026amp; V Leather Groover Skiving Tool Kit – 4-Piece Stainless Set\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/stainless-steel-ceramic-trimming-tool-curved-skip-knife\"\u003eStainless Steel Ceramic Trimming Tool – Curved Skip Knife\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/personal-protective-equipment\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on personal protective equipment\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Is the JINSLU K12-250 four-jaw chuck compatible with standard lathe machines?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The K12-250 uses the same short cylindrical center mounting connection method as standard 3-jaw lathe chucks, making it broadly compatible with most conventional lathe machines that accept a 250mm (10-inch) chuck.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What types of workpieces can the K12-250 self-centering chuck hold?\u003c\/h4\u003e\n\u003cp\u003eA: The K12-250 is designed to securely clamp a variety of workpiece shapes, including round, square, octagonal, and other polygonal profiles. The included inside and outside jaw sets expand your clamping versatility even further.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does the K12-250 come with both internal and external jaws?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The package includes 4 inside jaws and 4 outside (large) jaws, along with a safety chuck key and 3 mounting bolts — everything you need to get started right out of the box.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the clamping range of the K12-250?\u003c\/h4\u003e\n\u003cp\u003eA: The internal jaws provide a clamping range of 6–110mm (A–A1) and a jamming range of 80–250mm (B–B1). The external jaws offer a clamping range of 90–250mm (C–C1), accommodating a wide variety of part diameters.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Is the JINSLU K12-250 four-jaw chuck compatible with standard lathe machines?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The K12-250 uses the same short cylindrical center mounting connection method as standard 3-jaw lathe chucks, making it broadly compatible with most conventional lathe machines that accept a 250mm (10-inch) chuck.\"}}, {\"@type\": \"Question\", \"name\": \"What types of workpieces can the K12-250 self-centering chuck hold?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The K12-250 is designed to securely clamp a variety of workpiece shapes, including round, square, octagonal, and other polygonal profiles. The included inside and outside jaw sets expand your clamping versatility even further.\"}}, {\"@type\": \"Question\", \"name\": \"Does the K12-250 come with both internal and external jaws?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The package includes 4 inside jaws and 4 outside (large) jaws, along with a safety chuck key and 3 mounting bolts — everything you need to get started right out of the box.\"}}, {\"@type\": \"Question\", \"name\": \"What is the clamping range of the K12-250?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The internal jaws provide a clamping range of 6–110mm (A–A1) and a jamming range of 80–250mm (B–B1). The external jaws offer a clamping range of 90–250mm (C–C1), accommodating a wide variety of part diameters.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/gf1krb-by.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Home page\", \"item\": \"https:\/\/gf1krb-by.myshopify.com\/collections\/frontpage\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"JINSLU K12-250 4-Jaw Self-Centering Lathe Chuck 250mm 10\\\"\", \"item\": \"https:\/\/gf1krb-by.myshopify.com\/products\/jinslu-k12-250-4-jaw-self-centering-lathe-chuck-250mm-10inch\"}]}\u003c\/script\u003e","brand":"NIFTY","offers":[{"title":"Default Title","offer_id":67876194779360,"sku":"\u003cnone\u003e","price":738.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0831\/5384\/6496\/files\/Ha1bedca33da5486d93af3f2cab3f5557f.webp?v=1791761098","url":"https:\/\/niftyshopmart.com\/products\/jinslu-k12-250-4-jaw-self-centering-lathe-chuck-250mm-10inch","provider":"NIFTY","version":"1.0","type":"link"}