{"product_id":"key-type-differential-shaft","title":"Key Type Differential Shaft for Slitting \u0026 Rewinding Machines","description":"\u003cp\u003e For precision rewinding applications, combining a key type shaft with a web tension control system can significantly improve roll quality and tension stability. \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eXW Machinery key type air expandable shafts are designed for high-speed slitting, rewinding, coating, and converting applications requiring stable core gripping and reliable tension performance.\u003c\/p\u003e\n\u003cp\u003e  Our pneumatic key type shafts provide strong expansion force, accurate roll positioning, and durable operation for paper, film, foil, label, and lithium battery production lines.\u003c\/p\u003e\n\u003cp\u003e  Customized shaft diameters, lengths, materials, and expansion structures are available for various industrial applications.\u003c\/p\u003e\n\u003ch2\u003eKey Features of XW Machinery Key Type Air Shafts\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eStrong and stable core gripping force\u003c\/li\u003e\n\u003cli\u003eSmooth expansion and deflation operation\u003c\/li\u003e\n\u003cli\u003eHigh concentricity for high-speed rewinding\u003c\/li\u003e\n\u003cli\u003eDurable steel and aluminum shaft options\u003c\/li\u003e\n\u003cli\u003eStable web tension performance\u003c\/li\u003e\n\u003cli\u003eSuitable for heavy-duty industrial applications\u003c\/li\u003e\n\u003cli\u003eCustomized shaft diameter and length available\u003c\/li\u003e\n\u003cli\u003eLong service life with low maintenance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eApplications of Key Type Air Expandable Shafts\u003c\/h2\u003e\n\u003cp\u003eOur key type air shafts are widely used in:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSlitting machines\u003c\/li\u003e\n\u003cli\u003eRewinding machines\u003c\/li\u003e\n\u003cli\u003eCoating machines\u003c\/li\u003e\n\u003cli\u003ePrinting machinery\u003c\/li\u003e\n\u003cli\u003eFilm converting equipment\u003c\/li\u003e\n\u003cli\u003ePaper processing lines\u003c\/li\u003e\n\u003cli\u003eFlexible packaging systems\u003c\/li\u003e\n\u003cli\u003eFoil slitting machines\u003c\/li\u003e\n\u003cli\u003eLithium battery production lines\u003c\/li\u003e\n\u003cli\u003eLabel rewinding equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSteel vs Aluminum Key Type Air Shaft\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003cth\u003eAdvantages\u003c\/th\u003e\n\u003cth\u003eRecommended Applications\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSteel Key Type Shaft\u003c\/td\u003e\n\u003ctd\u003eHigher load capacity and durability\u003c\/td\u003e\n\u003ctd\u003eHeavy rolls, wide-width materials\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAluminum Key Type Shaft\u003c\/td\u003e\n\u003ctd\u003eLightweight and suitable for high-speed operation\u003c\/td\u003e\n\u003ctd\u003eFilm, label, and lightweight converting materials\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e  For advanced rewinding performance, key type shafts are often integrated with a web tension control system to improve tension stability and roll quality.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e  XW Machinery\u003c\/strong\u003e specializes in customizing Key Type flexible inflatable shafts, designed specifically for tile coating machines, bearing positioning, and precision coating production lines. Adopting a pneumatic expansion+key bar locking structure, it can quickly and evenly clamp the core, achieving efficient and slip free winding and unwinding.\u003cstrong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eItem\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eShaft Type\u003c\/td\u003e\n\u003ctd\u003eKey Type Air Expandable Shaft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Size\u003c\/td\u003e\n\u003ctd\u003e1 inch, 3 inch, 6 inch, customized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eSteel \/ Aluminum Alloy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExpansion Type\u003c\/td\u003e\n\u003ctd\u003ePneumatic Expansion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003eWinding \u0026amp; Rewinding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Speed\u003c\/td\u003e\n\u003ctd\u003eCustomized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface Treatment\u003c\/td\u003e\n\u003ctd\u003eHard Chrome \/ Anodized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCustomization\u003c\/td\u003e\n\u003ctd\u003eSupported\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0823\/3408\/9472\/files\/ScreenShot_2026-04-08_163624_707.png?v=1775637531\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0823\/3408\/9472\/files\/Key-Type_Air_Expanding_Shaft_drawing_parameter.png?v=1776076391\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical parameters (customizable)\u003c\/strong\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMaterial: 45 # steel\/seamless steel pipe\/aluminum alloy (optional)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eInflatable diameter: 3 inches, 6 inches (supports other sizes)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe length, shaft head form, and number of key bars can be customized according\u003c\/li\u003e\n\u003cli\u003eto the drawings\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWorking pressure: 0.4-0.8 MPa\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCertification: ISO9001 Factory Certification\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat Is a Key Type Air Expandable Shaft?\u003c\/h2\u003e\n\u003cp\u003eA key type air expandable shaft is a pneumatic winding shaft designed to securely grip paper cores during winding and unwinding operations. After air inflation, the expansion keys extend outward evenly to lock the core firmly and maintain stable torque transmission.\u003c\/p\u003e\n\u003cp\u003e Compared with standard lug structures, key type air shafts provide stronger core engagement, better concentricity, and smoother operation in high-speed converting equipment.\u003c\/p\u003e\n\u003cp\u003e XW Machinery manufactures customized key type air expandable shafts for slitting machines, rewinding systems, coating lines, printing equipment, and flexible packaging machinery.\u003c\/p\u003e\n\u003cp\u003e XW Machinery also provides high-performance differential air shafts and slitter rewinder machine parts for advanced converting industries.\u003c\/p\u003e\n\u003cp\u003e Many high-speed slitting machines use a magnetic powder clutch together with pneumatic shafts to achieve accurate torque control.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose XW Machinery?\u003c\/h2\u003e\n\u003cp\u003eXW Machinery specializes in precision web handling components for modern converting industries. We provide customized pneumatic shaft solutions for customers worldwide.\u003c\/p\u003e\n\u003cp\u003eOur main products include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"Industrial Air Expanding Shaft For Winding Slitting Machine\" href=\"https:\/\/xw-machinery.com\/products\/lug-type-air-shaft\" target=\"_blank\"\u003eAir expanding shafts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"Differential Slip Shaft For Film Paper Rewinding\" href=\"https:\/\/xw-machinery.com\/products\/ball-type-differential-shaft\" target=\"_blank\"\u003eDifferential air shafts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"XW Machinery Magnetic Powder Clutch Supports Precise Tension Regulation \" href=\"https:\/\/xw-machinery.com\/products\/magnetic-powder-clutch-6nm-400nm?variant=48228557029632\" target=\"_blank\"\u003eMagnetic powder clutches\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"Web Guide Correction System For Printing Packaging Line\" href=\"https:\/\/xw-machinery.com\/products\/servo-linear-actuator-epc-web-guide-system\" target=\"_blank\"\u003eWeb guiding systems\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"Precision Tension Controllers for Rolling \u0026amp; Slitting Lines\" href=\"https:\/\/xw-machinery.com\/products\/split-tension-controller-magnetic-powder-brake-system\" target=\"_blank\"\u003eTension controllers\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca rel=\"noopener\" title=\"Hollow Shaft Magnetic Powder Clutch For Tension Control\" href=\"https:\/\/xw-machinery.com\/products\/xw-hollow-shaft-magnetic-powder-clutch-6nm-400nm?variant=48228617748736\" target=\"_blank\"\u003eSlitter rewinder machine parts\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWith stable quality control and flexible customization capability, XW Machinery supports a wide range of industrial winding and rewinding applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOrdering Process：\u003c\/strong\u003e\u003cbr\u003e1.    Inquiry: Send us your requirements (Diameter, Length, Material).\u003cbr\u003e2.    Drawing Confirmation: Our engineers provide\/confirm technical drawings within 4 hours.\u003cbr\u003e3.    Quotation: Competitive factory-direct pricing based on specs.\u003cbr\u003e4.    Production: 7-15 days lead time (standard parts).\u003cbr\u003e5.    Quality Check: ISO9001 standard inspection before shipping.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e   Can you customize the shaft length to fit our machine? (Yes, we provide drawings for confirmation.)\u003cbr\u003e2.    What is the MOQ? (1 piece is supported.)\u003cbr\u003e3.    How do you handle shipping for long shafts? (Reinforced wooden cases.)\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eOur factory has passed ISO9001 quality certification, ensuring quality assurance.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0823\/3408\/9472\/files\/xw_machinery_parts_iso_certification.png?v=1776044132\"\u003e\u003c\/p\u003e\n\u003ch3\u003eWhat is a key type air expandable shaft?\u003c\/h3\u003e\n\u003cp\u003eA key type air expandable shaft is a pneumatic shaft that expands outward using key bars to securely hold paper or film cores during rewinding and unwinding processes.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eWhat are the advantages of key type air shafts?\u003c\/h3\u003e\n\u003cp\u003eKey type shafts provide strong gripping force, stable rotation, high concentricity, and reliable operation for high-speed converting applications.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eWhat industries use key type air shafts?\u003c\/h3\u003e\n\u003cp\u003eThey are widely used in paper, film, foil, flexible packaging, printing, coating, and lithium battery industries.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eCan you customize shaft sizes?\u003c\/h3\u003e\n\u003cp\u003eYes. XW Machinery supports customized shaft diameters, lengths, materials, and expansion structures according to machine requirements.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eWhat core sizes are available?\u003c\/h3\u003e\n\u003cp\u003eCommon sizes include 1 inch, 3 inch, and 6 inch cores, with customized specifications available.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0823\/3408\/9472\/files\/20260313202126_23_29.jpg?v=1775444853\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0823\/3408\/9472\/files\/20260313202119_12_29.jpg?v=1775446339\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eWe are a professional manufacturer of inflatable shafts in China, specializing in the production of various types of inflatable shafts, pneumatic clamps, and friction shafts. We have served hundreds of coating, printing, and packaging enterprises worldwide. Do you need drawings or quotations? Click on 'Get A Quote' or contact customer service, reply within 4 hours!\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0823\/3408\/9472\/files\/20260313202120_14_29.jpg?v=1775446344\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0823\/3408\/9472\/files\/20260313202123_18_29.jpg?v=1775446350\" alt=\"\"\u003e\u003c\/p\u003e","brand":"XW Machinery","offers":[{"title":"Default Title","offer_id":48204534972672,"sku":null,"price":219.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/3408\/9472\/files\/key-type-differential-shaft-for-slitting-machine.jpg?v=1779075558","url":"https:\/\/xw-machinery.com\/products\/key-type-differential-shaft","provider":"XW Machinery","version":"1.0","type":"link"}