{"title":"Bison 4 Jaw Independent Chucks","description":"\u003cp\u003eBison 4 jaw independent chucks, where each jaw is adjusted on its own, for clamping irregular and off-centre work. Cast iron and steel bodies, front mount and camlock.\u003c\/p\u003e\u003cp\u003eAll held in UK stock. Order before 4.30pm for same-day dispatch, or call our technical team on 01732 887334 for help choosing.\u003c\/p\u003e","products":[{"product_id":"4304-200","title":"Bison Cast Iron Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 200mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 4304 series Cast Iron 4 Jaw Independent Chuck (Front Mount, 200mm) is a flexible workholding solution for turning and milling setups. Supplied with 1 set of solid reversable jaws, each jaw can be positioned independently to clamp irregular shapes with precision and control.\n\u003c\/p\u003e \u003cp\u003eManufactured in Poland, Bison chucks are renowned for exceptional quality and long tool life, delivering dependable performance in demanding workshop environments.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw positioning for irregular workpieces\u003c\/b\u003e: Each jaw can be moved separately, allowing precise gripping of off-center or irregular profiles for stable, repeatable clamping.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid reversable jaws included\u003c\/b\u003e: One set of solid reversable jaws provides immediate versatility and can be flipped for different grip configurations, saving setup time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurable cast-iron body, front-mount design\u003c\/b\u003e: Built for rigidity and long service life; the front-mount arrangement simplifies installation on compatible machines and supports consistent results.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nBy enabling independent jaw control, you can clamp irregular workpieces with confidence, reduce time spent on setup, and achieve stable, repeatable gripping across different shapes. The included solid reversable jaws add versatility from the start, while the rugged cast iron body and Poland-made manufacturing heritage ensure lasting performance and dependable results in busy workshops.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282881687630,"sku":"4304-200","price":906.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4304_867a4fc8-2718-4844-b7e4-dfe6607a5d72.png?v=1694801352"},{"product_id":"4304-250","title":"Bison Cast Iron Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 250mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison Cast Iron Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 250mm is a rugged, reliable workholding solution designed for precision machining. With four independent jaws, you can clamp round, square, or irregular parts by adjusting each jaw individually, delivering true concentric grip even on unconventional shapes.\n\u003c\/p\u003e\n\u003cp\u003e\nMade in Poland as part of the 4304 series, this 250 mm chuck emphasizes durability and long tool life. It ships with one set of solid reversible jaws, ready to tackle demanding jobs in workshops, schools, and production environments.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw adjustment for irregular workpieces\u003c\/b\u003e: Each jaw can be positioned independently, enabling precise clamping of off-center or irregular shapes without re-centering the workpiece.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid reversible jaw set included\u003c\/b\u003e: Comes with one complete jaw set that can be reversed for extended use, providing fast, reliable setup right out of the box.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurable cast iron construction for long tool life\u003c\/b\u003e: Rigid, robust chuck body delivers consistent grip and longevity through heavy daily use.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis independent 4‑jaw chuck streamlines your workflow by delivering secure, repeatable clamping across a wide range of part geometries. Its front‑mount design simplifies installation, while the 250 mm size offers a versatile balance of holding power and runout control, helping you achieve accurate, repeatable results with less setup and fewer adjustments.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282881720398,"sku":"4304-250","price":1123.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4304_d7906808-c152-406d-830b-432e32be2377.png?v=1694801356"},{"product_id":"4304-315","title":"Bison Cast Iron Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 315mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 4304 series Cast Iron 4 Jaw Independent Chuck (front mount, 315mm) is a robust turning accessory designed for lathes. Supplied with one set of solid reversible jaws, it lets each jaw move independently, delivering flexible, precise clamping for irregular workpieces.\n\u003c\/p\u003e \u003cp\u003e\nManufactured in Poland, Bison chucks are known for exceptional quality and long tool life, making them a dependable choice for workshops, engineering shops, and hobbyist setups.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw positioning\u003c\/b\u003e: Each jaw can be positioned independently, enabling tailored gripping of odd-shaped parts for improved accuracy and quicker setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid reversible jaws included\u003c\/b\u003e: The included jaws are durable and reversible, offering versatile grip options and extended life without frequent jaw changes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRigid cast iron construction\u003c\/b\u003e: A sturdy cast iron body provides rigidity and repeatable clamping force for demanding machining tasks.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nWith this chuck, you gain reliable, customizable grip on a range of workpieces, reducing setup time and improving part consistency. The independent jaw control lets you tackle irregular shapes with confidence, while the durable build and Poland-made quality support long-term, predictable performance in both professional shops and serious hobby setups.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282881753166,"sku":"4304-315","price":1449.02,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4304_89aa1b1e-4e0b-4c90-b07f-8ad3c3b6d9ae.png?v=1694801360"},{"product_id":"4304-400","title":"Bison Cast Iron Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 400mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 4304 series Cast Iron 4-Jaw Independent Chuck is a front-mount lathe chuck designed to freely grip irregular and non-round workpieces with precision. With four independently movable jaws, you can true and clamp complex shapes for secure, concentric results. It ships with one set of solid reversible jaws, ready to use on your 400 mm chuck.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw adjustment for irregular shapes\u003c\/b\u003e: Move each jaw separately to center and grip oddly shaped parts, delivering improved runout control and a tighter, more dependable hold.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFront-mount design with a single solid reversible jaw set\u003c\/b\u003e: Simplifies setup and delivers reliable clamping across a range of part sizes without complex jaw configurations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurable cast-iron construction\u003c\/b\u003e: Built for rigidity and long tool life, delivering consistent performance in daily machining and reducing downtime.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nManufactured in Poland, the Bison chuck combines sturdy construction with proven reliability to support demanding workshop use. Its 400 mm size provides a balance of capacity and stiffness, making it well-suited for a broad spectrum of turning tasks—from routine parts to challenging, non-standard workpieces. Trust in its robust build and independent jaw control to deliver repeatable, professional results.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282881785934,"sku":"4304-400","price":2128.48,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4304_0de84c58-4215-4f88-adfb-428e1bf3d7d3.png?v=1694801364"},{"product_id":"4304-500","title":"Bison Cast Iron Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 500mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison Cast Iron Independent Chuck – 4 Jaw – 1 Piece Jaw (Front Mount) – 500mm is a robust, high-capacity holding solution designed for large workpieces and demanding machining tasks. Built for machinists, engineers, and hobbyists who need flexible, precise clamping, this 4-jaw independent chuck provides reliable grip on irregular or off-center parts while simplifying setup on the lathe or milling machine.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw positioning for irregular workpieces\u003c\/b\u003e: Each jaw can be moved separately, enabling exact centering and secure grip on non-round profiles and oddly shaped parts, reducing repositioning time and increasing accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid reversible jaws included\u003c\/b\u003e: Comes with one set of durable, reversible jaws for flexible gripping options and extended usable life, allowing you to adapt to different parts without changing tools.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRugged cast iron construction\u003c\/b\u003e: The sturdy cast iron body delivers rigidity and long service life in busy workshops, maintaining consistent clamping force under heavy cutting and high-load conditions.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nDesigned for reliable performance across a range of applications—from prototype work to production runs—the chuck supports fast, confident setups and repeatable results. Its front-mount design and solid build give you a dependable, long-lasting holding solution that helps you finish parts accurately, minimize downtime, and keep your workflow moving smoothly.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282881818702,"sku":"4304-500","price":3934.72,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4304_96457260-3563-4275-9b1d-eaef001a4614.png?v=1694801368"},{"product_id":"4304-630","title":"Bison Cast Iron Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 630mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 4304 series Cast Iron 4-Jaw Independent Chuck is a rugged front-mount workholding solution designed for machinists, engineers, and hobbyists who need a secure grip on round and irregular shapes. Supplied with a set of solid reversible jaws, this 630mm chuck lets you reposition each jaw independently for flexible, precise clamping of odd-shaped pieces without changing jaws.\n\u003c\/p\u003e \u003cp\u003e\nManufactured in Poland, these chucks are renowned for exceptional quality and long tool life, delivering dependable performance under demanding machining conditions.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw positioning\u003c\/b\u003e: Each jaw can be moved and locked independently, enabling precise centering and secure gripping of irregular workpieces—no awkward compromises or rework.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid reversible jaws included\u003c\/b\u003e: The chuck arrives with a complete set of durable, reversible jaws, providing reliable grip and quick setup for a variety of part geometries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e630 mm size with front-mount design\u003c\/b\u003e: Robust front-mount construction in a 630 mm size offers strong, stable holding and easy mounting on compatible machines, built from cast iron for rigidity and long life.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nWith independent jaw control, included reversible jaws, and a durable cast iron build, the Bison 4304 4-jaw chuck delivers repeatable holding across a wide range of parts. It supports faster setups, consistent results, and reliable performance in production runs, prototyping, and workshop applications.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282881851470,"sku":"4304-630","price":5080.58,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4304_e8eceb6d-6a39-465c-a655-f1cebeb3270e.png?v=1694801372"},{"product_id":"4344-200-4","title":"Bison Cast Iron Independent Chuck - 4 Jaw - 1 Piece Jaw (Camlock Mount) - 200mm (D1-4 Camlock)","description":"\u003cdiv\u003e\n\u003cp\u003eThe Bison 4344 series Cast Iron 4 Jaw Camlock Independent Chuck is a rugged, versatile workholding solution for milling and turning setups. It is designed for machinists, engineers, tradespeople, hobbyists, and anyone needing reliable grip on irregular workpieces.\u003c\/p\u003e \u003cp\u003eSupplied with 1 set of solid reversible jaws, this chuck lets you alter the position of each jaw independently for extra flexibility and precise clamping of irregular shapes. All Bison chucks are manufactured in Poland and are renowned for offering exceptional quality and tool life.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw positioning\u003c\/b\u003e: Each jaw can be positioned separately, enabling secure, precise grip on irregular workpieces and allowing fine centering without changing fixtures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIncluded solid reversible jaws\u003c\/b\u003e: The 1 set of jaws is strong and reversible, giving you flexible grip options and longer jaw life by reorienting for different parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCamlock mount for fast, secure setup\u003c\/b\u003e: The D1-4 camlock mounting and robust cast-iron body deliver quick, repeatable mounting and reliable clamping for demanding jobs.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWith the Bison 4344 Cast Iron Independent Chuck, you gain a dependable holding solution that adapts to varied parts, reduces setup time, and delivers consistent gripping performance across demanding applications. The independent jaw action and included reversible jaws enable precise, flexible clamping, while the camlock mount and Polish manufacturing heritage support quick installation and long tool life. This combination makes it a trusted choice for workshops that require accuracy, durability, and repeatable results.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282881884238,"sku":"4344-200-4","price":1054.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4344_e99c0b59-0456-4722-b81c-cbebf3212785.png?v=1694801376"},{"product_id":"4344-200-6","title":"Bison Cast Iron Independent Chuck - 4 Jaw - 1 Piece Jaw (Camlock Mount) - 200mm (D1-6 Camlock)","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 4344 series Cast Iron 4 Jaw Camlock Independent Chuck is built for turning centers and bench lathes that demand flexible gripping on irregular workpieces. With four independently adjustable jaws and a single set of solid reversible jaws, it lets you tailor the grip to the part shape, improving concentricity and clamping security.\n\u003c\/p\u003e \u003cp\u003e\nManufactured in Poland, Bison chucks are known for their rugged build, long tool life, and consistent performance. This 200mm (D1-6 Camlock) chuck uses a camlock mount for quick, stable mounting and reliable runout, making it a trusted choice for engineers, shop floor technicians, and demanding hobbyists.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw positioning for irregular workpieces\u003c\/b\u003e: Each jaw can be moved separately, enabling precise grip on non-round shapes and ensuring true workpiece alignment without repositioning the entire chuck.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid reversible jaws for versatile, durable clamping\u003c\/b\u003e: The included reversible jaws provide multi-angle gripping and extended life, so you can adapt to different part geometries without swapping jaws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCast iron with Camlock mount (D1-6) for fast, secure setup\u003c\/b\u003e: Durable cast iron body paired with a Camlock D1-6 interface ensures rigid mounting, minimal runout, and quick changes between setups on compatible machines.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis combination delivers reliable grip and repeatable results, reduces setup time, and contributes to smoother workflow in production or workshop environments. With its robust construction and flexible clamping capability, the Bison 4344 Camlock chuck helps you achieve consistent part quality while maintaining long service life.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282881917006,"sku":"4344-200-6","price":1054.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4344_7c3ab868-631d-4030-a2bb-819aabe68b12.png?v=1694801380"},{"product_id":"4344-250-6","title":"Bison Cast Iron Independent Chuck - 4 Jaw - 1 Piece Jaw (Camlock Mount) - 250mm (D1-6 Camlock)","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 4344 series Cast Iron 4 Jaw Camlock Independent Chuck is engineered for precise, flexible grip on irregular workpieces. Its four jaws can be positioned independently, letting you tailor each grip to complex shapes and features for reliable holding during turning, facing, and finishing.\n\u003c\/p\u003e\n\u003cp\u003e\nWith a 250mm diameter capacity and D1-6 camlock mounting, this chuck offers fast, secure setup on compatible lathes. It ships with a set of solid reversible jaws, and all Bison chucks are manufactured in Poland, renowned for exceptional quality and long tool life.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw positioning\u003c\/b\u003e: Tailor grip to complex shapes with four independently movable jaws for precise, secure clamping of irregular workpieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid reversible jaws included\u003c\/b\u003e: A complete set of durable reversible jaws that stay sharp and provide reliable grip across a wide range of parts; easy to flip as needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCamlock mounting and Polish craftsmanship\u003c\/b\u003e: 250mm diameter cast-iron chuck with D1-6 camlock interface for fast, repeatable setup and long-lasting performance manufactured in Poland.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis chuck is designed to streamline your workflow by delivering confident holds on challenging parts, reducing setup time between jobs, and maintaining consistent gripping accuracy across multiple passes. Built from robust cast iron and supported by Poland’s manufacturing heritage, it offers enduring durability and reliable performance in demanding turning operations.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282881982542,"sku":"4344-250-6","price":1290.02,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4344_588ff3c2-6fa4-4589-b108-9de2e0230c42.png?v=1694801384"},{"product_id":"4344-250-8","title":"Bison Cast Iron Independent Chuck - 4 Jaw - 1 Piece Jaw (Camlock Mount) - 250mm (D1-8 Camlock)","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 4344 Cast Iron 4-Jaw Camlock Independent Chuck is a versatile holding solution for turning operations that demand flexibility and precision. With four individually adjustable jaws, you can securely grip irregular or asymmetrical workpieces without distortion, delivering consistent results on a wide range of parts.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw positioning\u003c\/b\u003e: Each jaw can be moved separately, enabling precise, customized grips on irregular shapes and improving accuracy and repeatability for challenging parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCamlock mount with fast setup\u003c\/b\u003e: Designed for quick mounting on compatible spindles, the camlock system provides secure, stable gripping with minimal setup time for faster cycle throughput.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eIncludes solid reversible jaw set\u003c\/b\u003e: Comes with a durable set of reversible jaws that can be flipped for extended life and adapted to various part geometries, reducing tooling changes and downtime.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nManufactured in Poland, Bison chucks are trusted for exceptional quality and long tool life. This 4‑jaw independent chuck delivers reliable, repeatable clamping across a broad array of turning tasks, helping you improve workflow, reduce setup time, and achieve cleaner, more consistent finishes.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282882015310,"sku":"4344-250-8","price":1290.02,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4344_170c9701-ace0-46f4-836f-f00c2b51a3d2.png?v=1694801388"},{"product_id":"4344-315-6","title":"Bison Cast Iron Independent Chuck - 4 Jaw - 1 Piece Jaw (Camlock Mount) - 315mm (D1-6 Camlock)","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 4344 series Cast Iron 4 Jaw Camlock Independent Chuck is a versatile workholding solution for lathes, designed to grip irregular or off-center parts with maximum control. Supplied with a set of solid reversible jaws, it lets you adjust each jaw independently to achieve precise, custom clamping without repositioning the workpiece.\n\u003c\/p\u003e \u003cp\u003e\nManufactured in Poland, Bison chucks are trusted for their sturdy build and long tool life. The 4344 camlock independent chuck combines robust cast iron construction with reliable performance, making it suitable for demanding turning applications in metalworking shops, engineering labs, and advanced hobby setups.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw positioning\u003c\/b\u003e: Each of the four jaws can be moved separately, enabling precise centering and secure grip on irregular or non-round workpieces—reducing setup time and boosting clamping accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurable cast iron body with solid reversible jaws\u003c\/b\u003e: Rigid construction delivers stable, repeatable performance, while the included reversible jaws provide versatile gripping options and extended jaw life for tougher jobs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCamlock mounting with D1-6 interface (315mm)\u003c\/b\u003e: Fast, secure installation on compatible spindles with consistent alignment, enabling quick tool changes and reliable runout control on demanding turning operations.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis chuck supports smooth, confident machining workflows by offering flexible grip for irregular parts, durable performance under heavy use, and a mounting system that simplifies setup. Trusted Polish craftsmanship behind the Bison name helps ensure consistent results and long-term value for both professional shops and serious hobbyists.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282882048078,"sku":"4344-315-6","price":1592.12,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4344_dfc696fb-5229-40e7-ac88-3931c3d9c06f.png?v=1694801393"},{"product_id":"4344-315-8","title":"Bison Cast Iron Independent Chuck - 4 Jaw - 1 Piece Jaw (Camlock Mount) - 315mm (D1-8 Camlock)","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 4344 series Cast Iron 4-Jaw Camlock Independent Chuck is a robust, precision-built workholding solution designed for a wide range of lathes. With a 315mm diameter and a D1-8 camlock mounting, it delivers dependable performance in both workshop and production settings. This chuck is ideal for engineers, machinists, and hobbyists who need versatile clamping for round and irregular workpieces.\n\u003c\/p\u003e\n\u003cp\u003e\nSupplied with 1 set of solid reversible jaws, it lets you position each jaw independently to tailor your grip for complex shapes. This flexibility translates to improved concentricity and secure holding on irregular profiles, reducing setup time and secondary operations. All Bison chucks are manufactured in Poland, renowned for long tool life and consistently high quality.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent Jaw Positioning for Irregular Workpieces\u003c\/b\u003e: Move each jaw separately to create a customized gripping geometry, delivering precise, repeatable clamping on off‑round and multi‑faceted parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid Reversible Jaws for Flexible, Long‑Lasting Grips\u003c\/b\u003e: The included jaws can be flipped to extend gripping options and life, enabling quick adaptation to different shapes without swapping jaws.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCamlock Mount for Quick, Secure Setup\u003c\/b\u003e: The D1-8 camlock interface provides fast, repeatable mounting and reliable alignment, minimizing downtime during tool changes while maintaining rigidity.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis chuck helps you streamline workflows by enabling fast setup, adaptable gripping, and consistent results across a variety of parts. Built with a cast iron body for stiffness and durability, and manufactured in Poland to exacting standards, it offers dependable performance and a long service life for demanding machining tasks.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282882113614,"sku":"4344-315-8","price":1592.12,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4344_5f26bd2b-5a86-4e0f-9fc8-0c01dbd0400d.png?v=1694801397"},{"product_id":"4306-100","title":"Bison Steel Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 100mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nMeet the Bison 4306 Series Steel 4-Jaw Independent Chuck in a 100mm front-mount format. This robust chuck is designed for reliable gripping during turning operations and ships with a set of solid reversible jaws to handle a variety of parts with confidence.\n\u003c\/p\u003e\n\u003cp\u003e\nEach jaw can be moved independently, giving you flexible, precise control when clamping irregular workpieces without swapping components. Manufactured in Poland, Bison chucks are renowned for their exceptional quality and long tool life, delivering consistent performance you can rely on day after day.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw positioning\u003c\/b\u003e: Move each jaw separately to accommodate irregular shapes and off-center features, enabling secure, versatile gripping without retooling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid reversible jaws included\u003c\/b\u003e: Comes with a durable, reversible jaw set for stable, long-lasting clamping that adapts to different workpieces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFront-mount 100mm design\u003c\/b\u003e: Compact, easy-to-integrate front-mount chuck that fits standard setups and helps maintain accurate alignment.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis chuck translates meticulous German-engineering-grade performance into everyday usability: fast, repeatable clamping across a range of parts, reduced setup time, and reliable grip that helps you hit tighter tolerances with fewer adjustments. Built to endure with Poland-made quality, it’s a dependable choice for shops that demand consistency and long tool life from their tooling investment.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282882146382,"sku":"4306-100","price":838.46,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4306_78391aaa-fded-42a1-9643-6ca59ed1b735.png?v=1694801402"},{"product_id":"4306-160","title":"Bison Steel Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 160mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 4306 series Steel 4-Jaw Independent Chuck is a robust, front-mount lathe chuck designed for precision gripping on a wide range of round and irregular workpieces. With a 160 mm mounting diameter, this chuck provides secure, repeatable clamping for demanding machining tasks. Supplied with 1 set of solid reversible jaws, it lets you tailor each jaw’s position independently for accurate centering and stable holding, even on non-standard shapes. Manufactured in Poland, Bison chucks are renowned for enduring tool life and consistent performance.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw positioning for irregular shapes\u003c\/b\u003e: Each jaw can be adjusted individually, enabling precise holding and centering on non-standard workpieces for superior runout control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid reversible jaws included\u003c\/b\u003e: Comes with a durable jaw set that can be flipped or swapped to suit different gripping needs, reducing setup time and downtime.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePolished steel construction from Poland\u003c\/b\u003e: Built from sturdy steel with proven reliability, delivering steady clamping force and long tool life in busy workshop environments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis chuck helps you speed up setup, improve holding security, and achieve repeatable results across a variety of parts. Its independently adjustable jaws reduce slip and runout, while the durable materials and proven manufacturing behind the Bison name provide confidence that you’re investing in a tool that endures daily use in professional settings.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282882179150,"sku":"4306-160","price":923.26,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4306_ea029b62-5097-4f70-9240-772e5a97e3f4.png?v=1694801405"},{"product_id":"4306-200","title":"Bison Steel Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 200mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 4306 series Steel 4-Jaw Independent Chuck is a robust, front-mount lathe chuck designed for precise, flexible workholding. Manufactured in Poland, it’s built to deliver consistent clamping force and long tool life across demanding turning applications.\n\u003c\/p\u003e \u003cp\u003e\nIncluded with the chuck is 1 set of solid reversible jaws. With independently adjustable jaws, you can center and secure irregular or off-round workpieces with greater confidence and less setup time.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw positioning for irregular workpieces\u003c\/b\u003e: Each jaw can be moved and set independently, enabling precise centering and a secure grip on off-round or asymmetrical parts, which reduces setup time and improves overall accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid reversible jaws included\u003c\/b\u003e: One set of durable reversible jaws is provided, offering multiple gripping configurations without swapping hardware, speeding setup and expanding your part-holding versatility.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eDurable, Poland-made construction\u003c\/b\u003e: Crafted from high-grade steel and manufactured in Poland for long tool life, reliable clamping, and consistent performance under demanding use.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nWhether you’re in a workshop, on a production floor, or pursuing hobby machining, this chuck helps you hold complex parts with confidence, improve workflow, and achieve repeatable results over time. Its independent jaw action, included reversible jaws, and proven build quality make it a dependable choice for precise, durable turning operations.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282882211918,"sku":"4306-200","price":1247.62,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4306_febfdcf7-691b-4fe5-9488-75ba58cce80e.png?v=1694801409"},{"product_id":"4306-250","title":"Bison Steel Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 250mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison Steel Independent Chuck – 4 Jaw, Front Mount, 250mm is a versatile gripping solution designed for precise holding of round and irregular workpieces. Part of the Bison 4306 series, this four-jaw independent chuck lets you set each jaw’s position separately, giving you exceptional flexibility and control when clamping odd-shaped stock or pieces that aren’t perfectly round.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent 4‑Jaw design for irregular workpieces\u003c\/b\u003e: Each jaw can be adjusted individually, enabling precise centering and secure grip on non-round shapes for consistent, repeatable results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFront mount with solid reversible jaws included\u003c\/b\u003e: Ready to use out of the box with a complete set of durable reversible jaws for quick setup and long-lasting performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePoland-made reliability and tool life\u003c\/b\u003e: Built in Poland to tight standards, delivering steady clamping force, durable construction, and extended service life for demanding shop environments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nDesigned for engineers, machinists, technicians, and hobbyists alike, this chuck helps you achieve centered, stable holding with confidence. Its independent jaw adjustment supports accurate workholding of irregular shapes, while the front-mount design simplifies integration into existing tooling setups. Trustworthy materials and craftsmanship from the 4306 series translate into reliable performance, minimal downtime, and long-term value in daily shop use.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282882244686,"sku":"4306-250","price":1414.04,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4306_b2979a1d-eda3-4e50-a6b7-47d1b5ca11e8.png?v=1694801413"},{"product_id":"4306-315","title":"Bison Steel Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 315mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 4306 series Steel 4-Jaw Independent Chuck (315mm) is a front-mount workholding solution built for precision and versatility. Designed for machinists, engineers, and hobbyists who frequently clamp irregular shapes, this chuck lets you set each jaw independently to center and secure odd contours with confidence.\n\u003c\/p\u003e\n\u003cp\u003e\nMade in Poland, Bison chucks are recognized for durable construction, long tool life, and reliable performance. This model ships with one set of solid reversible jaws, delivering immediate versatility for a wide range of workpieces.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw adjustment for irregular shapes\u003c\/b\u003e: Each jaw can be positioned separately, enabling precise centering and firm, customizable gripping on irregular or multi-diameter parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid reversible jaws included\u003c\/b\u003e: One set of durable jaws provides versatile, long-lasting gripping that can be swapped to suit different materials and part profiles without extra accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFront-mount design for fast setup\u003c\/b\u003e: Easy installation and alignment from the front, reducing setup time and delivering repeatable clamping performance across multiple parts.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis chuck helps you streamline workflows by delivering reliable, repeatable grip on challenging parts, minimizing runout, and reducing downtime between setups. With Polish-made quality and a proven tool-life reputation, you can count on consistent performance across your turning or milling projects, whether you’re a professional shop, a maker space, or a dedicated garage engineer.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282882277454,"sku":"4306-315","price":1892.1,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4306_19a0a8e3-39ff-4976-9e4d-b80aeeb02341.png?v=1694801417"},{"product_id":"4306-400","title":"Bison Steel Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 400mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison 4306 series 4-jaw independent chuck in steel is a front-mount setup designed for machinists, fabricators, and hobbyists who need secure, flexible gripping on round and irregular workpieces. With four independently adjustable jaws, you can center and clamp complex shapes with precision, reducing setup time and rework.\n\u003c\/p\u003e \u003cp\u003e\nThis chuck ships with a set of solid reversible jaws and is manufactured in Poland, a heritage that underpins its reputation for durable construction and long tool life. Built to withstand demanding workshop use, it delivers dependable performance across a wide range of turning and milling applications.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent four-jaw clamping for irregular shapes\u003c\/b\u003e: Adjust each jaw separately to achieve precise centering and a secure grip on tricky workpieces, boosting accuracy and reducing rework.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid reversible jaws included\u003c\/b\u003e: Durable, flip-ready jaws provide versatile gripping profiles and extended jaw life, helping you adapt quickly to different parts without extra purchases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFront-mount, 400 mm capacity from Poland\u003c\/b\u003e: Robust, rigid construction with a reliable mounting style and a large working diameter that supports stable, repeatable clamping in demanding tasks.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nWith this chuck, you gain faster, more confident setups, reliable holding power for large or oddly shaped parts, and a durable, long-lasting tool that stays consistent across jobs. Its independent jaw action and included jaws help you maintain steady workflow, improve cutting results, and reduce machine downtime.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282882310222,"sku":"4306-400","price":2665.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4306_c6e609c3-577b-42b9-8da4-77c74165fec4.png?v=1694801421"},{"product_id":"4306-500","title":"Bison Steel Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 500mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison Steel Independent Chuck is a 4‑jaw, front‑mount chuck designed for large turning applications. Part of the Bison 4306 series, it provides independent jaw movement, so each jaw can be positioned separately to center and clamp irregular workpieces with enhanced precision. This 500 mm chuck is built for demanding workshop use and supports versatile clamping across a range of shapes.\n\u003c\/p\u003e \u003cp\u003e\nManufactured in Poland, Bison chucks are known for exceptional quality and long tool life, offering dependable performance you can trust in daily production. The chuck ships with a set of solid reversible jaws, ready to tackle a variety of clamping tasks right out of the box.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw positioning\u003c\/b\u003e: Each jaw can be moved individually, enabling true center gripping and secure clamp on irregular shapes without re-centering the workpiece.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid reversible jaws\u003c\/b\u003e: One set of durable, reversible jaws provides multiple clamping profiles and extended jaw life for long-term reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFront-mount design with 500 mm capacity\u003c\/b\u003e: Front-loading mounting simplifies setup and stabilizes large workpieces, built to Poland-made standards for reliable performance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis chuck helps you achieve faster, more accurate turning by enabling flexible gripping for irregular shapes, reducing setup time and rework. The independent jaws give you greater control over workpiece alignment, while the included reversible jaws offer durable performance across different tasks. With Polish manufacturing backing and a proven track record for tool life, you can rely on consistent results and long-term value in daily production or hobbyist projects.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282882342990,"sku":"4306-500","price":4838.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4306_b5ac0964-7643-4887-b12b-7bc726047123.png?v=1694801425"},{"product_id":"4306-630","title":"Bison Steel Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 630mm","description":"\u003cdiv\u003e\n\u003cp\u003e\nThe Bison Steel Independent Chuck — 4 Jaw, Front Mount, 630mm — is a rugged lathe accessory designed for precise, flexible gripping of irregular workpieces. Part of the 4306 series, it ships with a set of solid reversible jaws, and each jaw can be positioned independently to tailor the grip exactly to your part.\n\u003c\/p\u003e \u003cp\u003e\nManufactured in Poland, Bison chucks are renowned for exceptional quality and long tool life. The independent jaw setup minimizes runout and lets you hold a wide range of shapes with consistent clamping force, making this chuck a dependable workhorse in busy shops and demanding projects.\n\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eIndependent jaw positioning for irregular workpieces\u003c\/b\u003e: Each jaw can be moved independently to center and secure non-round shapes, delivering precise grip and reduced runout for accurate turning and finishing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSolid reversible jaw set included\u003c\/b\u003e: The durable jaws are designed to be flipped and re-used, extending service life and adapting to different part profiles without needing a new jaw kit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eFront-mount design with large 630mm capacity\u003c\/b\u003e: Quick, secure mounting on compatible lathes with a broad clamping envelope, enabling versatile setups and stable, repeatable performance on larger parts.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\nThis chuck helps you streamline workflows by enabling fast, confident setups and repeatable gripping across a variety of part geometries. Built to endure regular use in professional environments, its Polish manufacture and robust construction deliver reliable performance, reduce downtime, and support higher-quality finishes on larger or irregular pieces.\n\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Bison","offers":[{"title":"Default Title","offer_id":40282882375758,"sku":"4306-630","price":7307.64,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0560\/3747\/4382\/files\/4306_eef60d9e-811a-426b-ac16-562d73e2c528.png?v=1694801429"}],"url":"https:\/\/www.protool-ltd.co.uk\/collections\/bison-independent-chucks.oembed","provider":"Protool Precision Tools","version":"1.0","type":"link"}