{"title":"Sheave Boxes","description":"\u003cp\u003e\u003cspan data-sheets-root=\"1\"\u003eAllen sheave boxes, or exit blocks as they're also known, are designed to meet the demands of performance sailing, offering a choice of plain bearing or ball bearing sheaves to suit your specific application. To provide optimal durability and efficiency, we offer sheaves in a range of materials, including Acetal, stainless steel, and aluminium. Perfectly suited for halyard systems, control line systems, and general running rigging, Allen sheave boxes are built to handle a variety of applications on boats up to 30ft. Please note: Working and breaking loads depend on the installation method of the sheave box.\u003c\/span\u003e\u003c\/p\u003e","products":[{"product_id":"a-4-aluminium-sheave-box-plain-bearing","title":"Aluminium 26mm Sheave Box - Plain Bearing","description":"\u003cdiv\u003e\n\u003ch3\u003eAluminium 26mm Sheave Box - Plain Bearing\u003c\/h3\u003e\n\u003cp\u003eDesigned for smooth and reliable rope or wire routing, this Aluminium Sheave Box features a durable aluminium body and a plain bearing sheave for dependable, low-maintenance performance. Ideal for installation in masts, decks, and other structures, it provides efficient line management in a compact and robust design.\u003c\/p\u003e\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDurable aluminium body\u003c\/li\u003e\n\u003cli\u003ePlain bearing sheave for reliable operation\u003c\/li\u003e\n\u003cli\u003eSuitable for rope and wire applications\u003c\/li\u003e\n\u003cli\u003eSmooth and efficient rope handling\u003c\/li\u003e\n\u003cli\u003eLow maintenance design\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant construction\u003c\/li\u003e\n\u003cli\u003eIdeal for marine and industrial applications\u003c\/li\u003e\n\u003cli\u003eSuitable for installation in masts, decks, and other structures\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196679233911,"sku":"A...4","price":12.03,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A...4.jpg?v=1781799724"},{"product_id":"a-5-aluminium-sheave-box-plain-bearing","title":"Aluminium 36mm Sheave Box - Plain Bearing","description":"\u003cdiv\u003e\n\u003ch3\u003eAluminium 36mm Sheave Box - Plain Bearing\u003c\/h3\u003e\n\u003cp\u003eDesigned for smooth and reliable rope or wire routing, this Aluminium Sheave Box features a durable aluminium body and a plain bearing sheave for dependable, low-maintenance performance. Ideal for installation in masts, decks, and other structures, it provides efficient line management in a compact and robust design.\u003c\/p\u003e\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDurable aluminium body\u003c\/li\u003e\n\u003cli\u003ePlain bearing sheave for reliable operation\u003c\/li\u003e\n\u003cli\u003eSuitable for rope and wire applications\u003c\/li\u003e\n\u003cli\u003eSmooth and efficient rope handling\u003c\/li\u003e\n\u003cli\u003eLow maintenance design\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant construction\u003c\/li\u003e\n\u003cli\u003eIdeal for marine and industrial applications\u003c\/li\u003e\n\u003cli\u003eSuitable for installation in masts, decks, and other structures\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196679332215,"sku":"A...5","price":12.03,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A...5.jpg?v=1781799726"},{"product_id":"a-6-aluminium-sheave-box-plain-bearing","title":"Aluminium 38mm Sheave Box - Large","description":"\u003cdiv\u003e\n\u003ch3\u003eAluminium Sheave Box - Large\u003c\/h3\u003e\n\u003cp\u003eDesigned for smooth and reliable rope or wire routing, this Large Aluminium Sheave Box features a durable cast aluminium body and a choice of sheave options to suit different applications. The removable axle pin allows for quick maintenance or sheave replacement and is securely retained by the mounting surface once installed.\u003c\/p\u003e\n\u003cp\u003eIdeal for installation in sailboat masts, decks, and other structures where ropes or wires need to pass through safely and efficiently.\u003c\/p\u003e\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDurable cast aluminium body\u003c\/li\u003e\n\u003cli\u003eRemovable axle pin for easy maintenance and sheave changes\u003c\/li\u003e\n\u003cli\u003eSuitable for rope and wire applications\u003c\/li\u003e\n\u003cli\u003eIdeal for sailboat masts, decks, and other installations\u003c\/li\u003e\n\u003cli\u003eChoice of sheave materials and bearing types\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant construction\u003c\/li\u003e\n\u003cli\u003eSuitable for demanding marine environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSheave Options:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAcetal Plain Bearing: Lightweight, low-maintenance option suitable for working loads up to 400kg.\u003c\/li\u003e\n\u003cli\u003eStainless Steel Dynamic: Features patented Dynamic Bearing Technology for exceptionally low friction and smooth operation. Ideal for fast-running systems with working loads up to 300kg.\u003c\/li\u003e\n\u003cli\u003eStainless Steel Plain Bearing: Heavy-duty option designed for highly statically loaded applications, with working loads up to 400kg. Suitable for rope and wire use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Plain Bearing - Acetal","offer_id":57196679430519,"sku":"A...6","price":12.86,"currency_code":"GBP","in_stock":true},{"title":"Dynamic Bearing - Steel","offer_id":57196679463287,"sku":"A...6B","price":47.36,"currency_code":"GBP","in_stock":true},{"title":"Plain Bearing - Aluminium","offer_id":57196679496055,"sku":"A...6H","price":18.6,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A...6.jpg?v=1781799727"},{"product_id":"a-7-aluminium-double-sheave-box-plain-bearing","title":"Aluminium 26mm Double Sheave Box - Plain Bearing","description":"\u003cdiv\u003e\n\u003ch3\u003eAluminium Double Sheave Box - Plain Bearing\u003c\/h3\u003e\n\u003cp\u003eDesigned for smooth and efficient rope routing, this Aluminium Double Sheave Box features a durable aluminium body and twin plain bearing sheaves, making it ideal for applications requiring multiple lines to be redirected in a compact space. Its robust construction provides reliable performance and excellent corrosion resistance in demanding marine environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eDurable aluminium body\u003c\/li\u003e\n\u003cli\u003eTwin plain bearing sheaves\u003c\/li\u003e\n\u003cli\u003eSmooth and reliable rope handling\u003c\/li\u003e\n\u003cli\u003eCompact, space-saving design\u003c\/li\u003e\n\u003cli\u003eLow maintenance construction\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant materials\u003c\/li\u003e\n\u003cli\u003eIdeal for marine and industrial applications\u003c\/li\u003e\n\u003cli\u003eSuitable for routing multiple lines through masts, decks, and structures\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196679627127,"sku":"A...7","price":18.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A...7.jpg?v=1781799728"},{"product_id":"a-8-nylon-sheave-box-plain-bearing","title":"Nylon Sheave Box - Plain Bearing","description":"\u003cp\u003eA...8\u003c\/p\u003e","brand":"Allen","offers":[{"title":"Plain Bearing - Acetal","offer_id":57196679659895,"sku":"A...8","price":10.13,"currency_code":"GBP","in_stock":true},{"title":"Plain Bearing - Aluminium","offer_id":57196679692663,"sku":"A...8A","price":20.61,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A...8.jpg?v=1781799730"},{"product_id":"a-15-low-profile-aluminium-sheave-box-plain-bearing","title":"Low Profile 25mm Sheave Box - Small","description":"\u003cdiv\u003e\n\u003ch3\u003eLow Profile Sheave Box - Small\u003c\/h3\u003e\n\u003cp\u003eDesigned for installation in masts and booms, this Small Low Profile Sheave Box features a compact cast aluminium body that hooks securely into place. The lower lip sits inside the mast while the top is fixed with a rivet or screw, creating a strong and low-profile installation. The sheave is permanently fitted for a simple, reliable design.\u003c\/p\u003e\n\u003cp\u003eAvailable with a choice of sheave options, it is ideal for smooth and efficient rope or wire routing in a wide range of marine applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eLow-profile cast aluminium body\u003c\/li\u003e\n\u003cli\u003eHook-in design for easy mast or boom installation\u003c\/li\u003e\n\u003cli\u003eSuitable for rope and wire applications\u003c\/li\u003e\n\u003cli\u003eDurable and corrosion-resistant construction\u003c\/li\u003e\n\u003cli\u003eChoice of sheave materials and bearing types\u003c\/li\u003e\n\u003cli\u003eCompact and reliable design\u003c\/li\u003e\n\u003cli\u003eIdeal for marine mast and boom applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSheave Options:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAcetal Plain Bearing: Lightweight, low-maintenance option with a maximum working load of up to 300kg. Suitable for rope and wire.\u003c\/li\u003e\n\u003cli\u003eStainless Steel Dynamic: Features patented Dynamic Bearing Technology for exceptionally low friction and smooth operation. Ideal for fast-running systems with a maximum working load of up to 300kg. Suitable for rope and wire.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Plain Bearing - Acetal","offer_id":57196679758199,"sku":"A..15","price":14.22,"currency_code":"GBP","in_stock":true},{"title":"Dynamic Bearing - Steel","offer_id":57196679790967,"sku":"A..15B","price":40.29,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A..15.jpg?v=1781799731"},{"product_id":"a-16-low-profile-aluminium-sheave-box-plain-bearing","title":"Low Profile 38mm Sheave Box - Medium","description":"\u003cdiv\u003e\n\u003ch3\u003eLow Profile Sheave Box – Medium\u003c\/h3\u003e\n\u003cp\u003eDesigned for installation in masts and booms, this Medium Low Profile Sheave Box features a compact cast aluminium body that hooks securely into place. The lower lip sits inside the mast while the top is fixed with a rivet or screw, creating a strong, low-profile installation. The sheave is permanently fitted for a simple and reliable design.\u003c\/p\u003e\n\u003cp\u003eAvailable with a choice of sheave options, it is suitable for a wide range of marine applications requiring smooth and efficient rope or wire routing.\u003c\/p\u003e\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eLow-profile cast aluminium body\u003c\/li\u003e\n\u003cli\u003eHook-in design for easy mast or boom installation\u003c\/li\u003e\n\u003cli\u003eSuitable for rope and wire applications\u003c\/li\u003e\n\u003cli\u003eDurable and corrosion-resistant construction\u003c\/li\u003e\n\u003cli\u003eChoice of sheave materials and bearing types\u003c\/li\u003e\n\u003cli\u003eCompact, reliable design\u003c\/li\u003e\n\u003cli\u003eIdeal for marine mast and boom applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSheave Options:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAcetal Plain Bearing: Lightweight, low-maintenance option with a maximum working load of up to 400kg. Suitable for rope and wire.\u003c\/li\u003e\n\u003cli\u003eStainless Steel Dynamic: Features patented Dynamic Bearing Technology for exceptionally low friction and smooth operation. Suitable for fast-running systems with a maximum working load of up to 450kg. Suitable for rope and wire.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Plain Bearing - Acetal","offer_id":57196679954807,"sku":"A..16","price":20.6,"currency_code":"GBP","in_stock":true},{"title":"Dynamic Bearing - Steel","offer_id":57196679987575,"sku":"A..16B","price":54.53,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A..16.jpg?v=1781799732"},{"product_id":"a-28-aluminium-sheave-box-plain-bearing","title":"Aluminium 38mm Sheave Box - Plain Bearing","description":"\u003cdiv\u003e\n\u003ch3\u003eAluminium Sheave Box - Plain Bearing\u003c\/h3\u003e\n\u003cp\u003eDesigned for routing rope or wire through masts, decks, and other structures, this Medium Aluminium Sheave Box features a durable forged aluminium body and a removable axle pin, allowing for quick maintenance or easy sheave replacement. The axle pin is securely retained by the mounting surface for a simple and reliable installation.\u003c\/p\u003e\n\u003cp\u003eIdeal for sailboat masts and a wide range of marine and industrial applications, the sheave box is available with multiple sheave options to suit different performance requirements.\u003c\/p\u003e\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eForged aluminium body for strength and durability\u003c\/li\u003e\n\u003cli\u003eRemovable axle pin for easy maintenance and sheave changes\u003c\/li\u003e\n\u003cli\u003eSuitable for rope and wire applications\u003c\/li\u003e\n\u003cli\u003eIdeal for sailboat masts, decks, and other installations\u003c\/li\u003e\n\u003cli\u003eChoice of sheave materials and bearing types\u003c\/li\u003e\n\u003cli\u003eMaximum working load up to 300kg (depending on sheave option)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSheave Options:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAcetal Plain Bearing: Lightweight, low-maintenance option suitable for rope and wire applications.\u003c\/li\u003e\n\u003cli\u003eStainless Steel Dynamic: Features patented Dynamic Bearing Technology for exceptionally low friction and smooth operation, ideal for fast-running systems.\u003c\/li\u003e\n\u003cli\u003eAluminium Plain Bearing: Robust option suited to highly statically loaded applications while maintaining compatibility with rope and wire.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196680937847,"sku":"A..28","price":35.75,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A..28.jpg?v=1781799744"},{"product_id":"a-94-nylon-mast-head-sheave-box-plain-bearing","title":"Nylon Mast Head Sheave Box - Plain Bearing","description":"\u003cp\u003eNylon Mast Head Sheave Box - Plain Bearing\u003c\/p\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196690243959,"sku":"A..94","price":36.7,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A..94.jpg?v=1781799825"},{"product_id":"a2121-single-through-deck","title":"20mm Single Dynamic Through Deck Block","description":"\u003ch3\u003e20mm Single Dynamic Through Deck Block\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e20mm Single Dynamic Through Deck Block\u003c\/strong\u003e provides smooth, low-friction guidance for rope control lines passing through a deck. Designed for adjustable rigging and other applications, it features a durable acetal body precisely shaped to support and protect the sheave.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave through deck design for efficient line routing\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eHard-wearing acetal body for long-lasting performance\u003c\/li\u003e\n\u003cli\u003eIdeal for adjustable rigging and high-load applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePatented Dynamic Bearing System\u003c\/strong\u003e with twin rows of stainless-steel ball bearings running on a stainless-steel rail\u003c\/li\u003e\n\u003cli\u003eSuperior load-carrying capability and service life compared to bearing systems running on plastic rails\u003c\/li\u003e\n\u003cli\u003eDelivers smooth, reliable performance in applications requiring constant sheave movement\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196763480439,"sku":"A2121","price":24.45,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A2121.jpg?v=1781800507"},{"product_id":"high-load-single-through-deck-block-2","title":"20mm Single High Load Through Deck Block","description":"\u003ch3\u003e20mm Single High Load Through Deck Block\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e20mm Single High Load Through Deck Block\u003c\/strong\u003e provides smooth, efficient guidance for rope and wire control lines passing through a deck. Designed for adjustable rigging and other high-load applications, it features a durable acetal body precisely shaped to support the sheave and deliver reliable performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave through deck design for efficient line routing\u003c\/li\u003e\n\u003cli\u003eSuitable for rope and wire control lines\u003c\/li\u003e\n\u003cli\u003eDurable acetal body engineered for demanding applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlain Bearing Sheave\u003c\/strong\u003e designed to handle high loads without the risk of bearing system failure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Load Stainless-Steel Sheave\u003c\/strong\u003e for improved durability and enhanced performance when used with wire\u003c\/li\u003e\n\u003cli\u003eIdeal for leading rigging wire through decks and other surfaces\u003c\/li\u003e\n\u003cli\u003eReliable, low-maintenance solution for high-load rigging applications\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196763578743,"sku":"A2121HL","price":42.89,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A2121HL-2-1.jpg?v=1781800509"},{"product_id":"high-load-double-through-deck-block","title":"20mm Double High Load Through Deck Block","description":"\u003cdiv\u003e\n\u003ch3\u003e20mm Double High Load Through Deck Block\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e20mm Double High Load Through Deck Block\u003c\/strong\u003e is designed to provide smooth, efficient guidance for rope and wire control lines passing through a deck. Its durable acetal body is precisely shaped to support the sheaves, delivering reliable performance in adjustable rigging and other high-load applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDouble-sheave through deck design for efficient line routing\u003c\/li\u003e\n\u003cli\u003eSuitable for rope and wire control lines\u003c\/li\u003e\n\u003cli\u003eDurable acetal body engineered for high-load applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlain bearing sheaves\u003c\/strong\u003e designed to handle high loads without the risk of bearing system failure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStainless-steel sheaves\u003c\/strong\u003e provide improved durability and enhanced performance when used with wire\u003c\/li\u003e\n\u003cli\u003eIdeal for leading rigging wire through decks and other surfaces\u003c\/li\u003e\n\u003cli\u003eReliable, low-maintenance solution for demanding rigging applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196764103031,"sku":"A2122HL","price":73.55,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A2122HL.jpg?v=1781800513"},{"product_id":"high-load-single-through-deck-block","title":"30mm Single High Load Through Deck Block","description":"\u003cdiv\u003e\n\u003ch3\u003e30mm Single High Load Through Deck Block\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e30mm Single High Load Through Deck Block\u003c\/strong\u003e provides smooth, efficient guidance for rope and wire control lines passing through a deck or surface. Designed for adjustable rigging and other high-load applications, it features a durable acetal body precisely shaped to support the sheave and deliver reliable performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-sheave through deck design for efficient line routing\u003c\/li\u003e\n\u003cli\u003eSuitable for rope and wire control lines\u003c\/li\u003e\n\u003cli\u003eDurable acetal body engineered for demanding applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlain Bearing Sheave\u003c\/strong\u003e designed to handle high loads without the risk of bearing system failure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Load Stainless-Steel Sheave\u003c\/strong\u003e for improved durability and enhanced performance when used with wire\u003c\/li\u003e\n\u003cli\u003eIdeal for leading rigging wire through decks and other surfaces\u003c\/li\u003e\n\u003cli\u003eReliable, low-maintenance solution for high-load rigging applications\u003c\/li\u003e\n\u003cli\u003eDesigned for smooth and efficient operation in demanding marine environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196764922231,"sku":"A2131HL","price":50.32,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A2131HL-1.jpg?v=1781800522"},{"product_id":"a2132-double-through-deck","title":"30mm Double Dynamic Through Deck Block","description":"\u003cdiv\u003e\n\u003ch3\u003e30mm Double Dynamic Through Deck Block\u003c\/h3\u003e\n\u003cp\u003eDesigned to provide smooth, low-friction guidance for rope and wire control lines passing through a deck, this 30mm Double Dynamic Through Deck Block delivers reliable performance in adjustable rigging and other highly loaded applications. Its hard-wearing acetal body is precisely shaped to support the sheaves and ensure efficient line control.\u003c\/p\u003e\n\u003cp\u003eFeaturing our patented Dynamic Bearing Technology, each sheave uses twin rows of stainless steel ball bearings running on a stainless steel rail, providing superior load-carrying capability and longevity compared to systems that run on plastic rails.\u003c\/p\u003e\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eTwin 30mm dynamic sheaves\u003c\/li\u003e\n\u003cli\u003ePatented Dynamic Bearing Technology\u003c\/li\u003e\n\u003cli\u003eTwin rows of stainless steel ball bearings\u003c\/li\u003e\n\u003cli\u003eStainless steel rail for superior durability\u003c\/li\u003e\n\u003cli\u003eHard-wearing acetal body\u003c\/li\u003e\n\u003cli\u003eSmooth, low-friction performance\u003c\/li\u003e\n\u003cli\u003eExcellent load-carrying capability\u003c\/li\u003e\n\u003cli\u003eIdeal for adjustable rigging and high-load applications\u003c\/li\u003e\n\u003cli\u003eSuitable for rope and wire control lines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196765249911,"sku":"A2132","price":45.37,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A213220resized-2.jpg?v=1781800527"},{"product_id":"double-through-deck-block","title":"30mm Double High Load Through Deck Block","description":"\u003ch3\u003e30mm Double High Load Through Deck Block\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003e30mm Double High Load Through Deck Block\u003c\/strong\u003e provides smooth, efficient guidance for rope and wire control lines passing through a deck. Designed for adjustable rigging and other high-load applications, it features a durable acetal body precisely shaped to support the sheaves and deliver reliable performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDouble-sheave through deck design for efficient line routing\u003c\/li\u003e\n\u003cli\u003eSuitable for rope and wire control lines\u003c\/li\u003e\n\u003cli\u003eDurable acetal body engineered for demanding applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlain Bearing Sheaves\u003c\/strong\u003e designed to handle high loads without the risk of bearing system failure\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Load Stainless-Steel Sheaves\u003c\/strong\u003e for improved durability and enhanced performance when used with wire\u003c\/li\u003e\n\u003cli\u003eIdeal for leading rigging wire through decks and other surfaces\u003c\/li\u003e\n\u003cli\u003eReliable, low-maintenance solution for high-load rigging applications\u003c\/li\u003e\n\u003cli\u003eDesigned for smooth and efficient operation in demanding marine environments\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196765282679,"sku":"A2132HL","price":85.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A2132HL.jpg?v=1781800530"},{"product_id":"sa-94-adaptor-for-a-94","title":"Adaptor For A..94","description":"\u003cp\u003eAdaptor For A..94\u003c\/p\u003e","brand":"Allen","offers":[{"title":"Default Title","offer_id":57196882133367,"sku":"SA..94","price":13.68,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/SA..94.jpg?v=1781801658"},{"product_id":"20mm-exit-sheave-box","title":"20mm Exit Sheave Box","description":"\u003cdiv\u003e\n\u003ch3\u003e20mm Exit Sheave Box\u003c\/h3\u003e\n\u003cp\u003eDesigned to improve the efficiency and durability of rigging systems, this 20mm Exit Sheave Box provides smooth and reliable rope or wire routing for masts, decks, and other marine applications. Manufactured from CNC-machined marine-grade aluminium, it features a removable axle pin for simple maintenance or sheave replacement, with a curved backing plate included for mounting to the leading edge of a mast.\u003c\/p\u003e\n\u003cp\u003eAvailable with a choice of sheave options, the design helps minimise wear on halyards, extending rope life while ensuring efficient performance.\u003c\/p\u003e\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCNC-machined marine-grade aluminium body\u003c\/li\u003e\n\u003cli\u003eRemovable axle pin for easy maintenance\u003c\/li\u003e\n\u003cli\u003eIncludes curved backing plate for mast mounting\u003c\/li\u003e\n\u003cli\u003eSuitable for rope and wire applications\u003c\/li\u003e\n\u003cli\u003eOptimised design to reduce halyard wear\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant construction\u003c\/li\u003e\n\u003cli\u003eIdeal for masts, decks, and other marine installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSheave Options:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAcetal Plain Bearing: Lightweight, low-maintenance option suitable for working loads up to 200kg. Compatible with rope and wire.\u003c\/li\u003e\n\u003cli\u003eDynamic Bearing: Features patented Dynamic Bearing Technology for exceptionally low friction and smooth operation. Ideal for fast-running systems with working loads up to 105kg. Best suited to rope applications.\u003c\/li\u003e\n\u003cli\u003eStainless Steel Plain Bearing: Heavy-duty option designed for highly statically loaded applications, with working loads up to 250kg. Compatible with rope and wire.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Plain \/ Acetal","offer_id":57196893733239,"sku":"A4420-4215-AP","price":36.08,"currency_code":"GBP","in_stock":true},{"title":"Dynamic \/ Acetal","offer_id":57196893766007,"sku":"A4420-4215-D","price":38.61,"currency_code":"GBP","in_stock":true},{"title":"Plain \/ Steel","offer_id":57196893798775,"sku":"A4420-4215-SP","price":40.3,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A4420-4215G-TOP.jpg?v=1781801773"},{"product_id":"30mm-exit-sheave-box","title":"30mm Exit Sheave Box","description":"\u003cdiv\u003e\n\u003ch3\u003e30mm Exit Sheave Box\u003c\/h3\u003e\n\u003cp\u003eDesigned to improve the efficiency and durability of rigging systems, this 30mm Exit Sheave Box provides smooth and reliable rope or wire routing for masts, decks, and other marine applications. Manufactured from CNC-machined marine-grade aluminium, it features a removable axle pin for simple maintenance or sheave replacement, with a curved backing plate included for mounting to the leading edge of a mast.\u003c\/p\u003e\n\u003cp\u003eAvailable with a choice of sheave options, the design helps minimise wear on halyards, extending rope life while ensuring efficient performance.\u003c\/p\u003e\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCNC-machined marine-grade aluminium body\u003c\/li\u003e\n\u003cli\u003eRemovable axle pin for easy maintenance\u003c\/li\u003e\n\u003cli\u003eIncludes curved backing plate for mast mounting\u003c\/li\u003e\n\u003cli\u003eSuitable for rope and wire applications\u003c\/li\u003e\n\u003cli\u003eOptimised design to reduce halyard wear\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant construction\u003c\/li\u003e\n\u003cli\u003eIdeal for masts, decks, and other marine installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSheave Options:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAcetal Plain Bearing: Lightweight, low-maintenance option suitable for working loads up to 200kg. Compatible with rope and wire.\u003c\/li\u003e\n\u003cli\u003eDynamic Ball Bearing: Features patented Dynamic Bearing Technology for exceptionally low friction and smooth operation. Ideal for fast-running systems with working loads up to 140kg. Best suited to rope applications.\u003c\/li\u003e\n\u003cli\u003eStainless Steel Plain Bearing: Heavy-duty option designed for highly statically loaded applications, with working loads up to 300kg. Compatible with rope and wire.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Plain \/ Acetal","offer_id":57196893962615,"sku":"A4430-4716-AP","price":40.59,"currency_code":"GBP","in_stock":true},{"title":"Dynamic \/ Acetal","offer_id":57196893995383,"sku":"A4430-4716-D","price":43.14,"currency_code":"GBP","in_stock":true},{"title":"Plain \/ Steel","offer_id":57196894028151,"sku":"A4430-4716-SP","price":46.93,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A4438-5818S20B-2.jpg?v=1781801774"},{"product_id":"a-9-aluminium-sheave-box-plain-bearing","title":"Aluminium 25mm Sheave Box - Medium","description":"\u003cdiv\u003e\n\u003ch3\u003eAluminium Sheave Box - Medium\u003c\/h3\u003e\n\u003cp\u003eDesigned for routing rope or wire through masts, decks, and other structures, this Medium Aluminium Sheave Box features a durable forged aluminium body and a removable axle pin, allowing for quick maintenance or easy sheave replacement. The axle pin is securely retained by the mounting surface for a simple and reliable installation.\u003c\/p\u003e\n\u003cp\u003eIdeal for sailboat masts and a wide range of marine and industrial applications, the sheave box is available with multiple sheave options to suit different performance requirements.\u003c\/p\u003e\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eForged aluminium body for strength and durability\u003c\/li\u003e\n\u003cli\u003eRemovable axle pin for easy maintenance and sheave changes\u003c\/li\u003e\n\u003cli\u003eSuitable for rope and wire applications\u003c\/li\u003e\n\u003cli\u003eIdeal for sailboat masts, decks, and other installations\u003c\/li\u003e\n\u003cli\u003eChoice of sheave materials and bearing types\u003c\/li\u003e\n\u003cli\u003eMaximum working load up to 300kg (depending on sheave option)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSheave Options:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAcetal Plain Bearing: Lightweight, low-maintenance option suitable for rope and wire applications.\u003c\/li\u003e\n\u003cli\u003eStainless Steel Dynamic: Features patented Dynamic Bearing Technology for exceptionally low friction and smooth operation, ideal for fast-running systems.\u003c\/li\u003e\n\u003cli\u003eAluminium Plain Bearing: Robust option suited to highly statically loaded applications while maintaining compatibility with rope and wire.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Plain Bearing - Acetal","offer_id":57196894617975,"sku":"A...9","price":10.11,"currency_code":"GBP","in_stock":true},{"title":"Dynamic Bearing - Steel","offer_id":57196894650743,"sku":"A...9B","price":29.02,"currency_code":"GBP","in_stock":true},{"title":"Plain Bearing - Aluminium","offer_id":57196894683511,"sku":"A...9H","price":17.08,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A...6_da8d415c-02be-4e66-b657-17efe7b7ae44.jpg?v=1785768126"},{"product_id":"wire-exit-sheave-box","title":"Wire Exit Sheave Box","description":"\u003cdiv\u003e\n\u003ch3\u003eWire Exit Sheave Box\u003c\/h3\u003e\n\u003cp\u003eDesigned specifically for wire halyard applications, this Wire Exit Sheave Box features a large ferrule opening that allows a wire ferrule to pass smoothly over the sheave and into the mast. Ideal for jib halyards and similar systems, it helps reduce wear on halyards while ensuring smooth and reliable operation.\u003c\/p\u003e\n\u003cp\u003eManufactured from CNC-machined marine-grade aluminium, the sheave box includes a removable axle pin for easy maintenance or sheave replacement. A curved backing plate is also included, making it suitable for mounting to the leading edge of a mast.\u003c\/p\u003e\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCNC-machined marine-grade aluminium body\u003c\/li\u003e\n\u003cli\u003eLarge ferrule opening for wire halyard applications\u003c\/li\u003e\n\u003cli\u003eRemovable axle pin for easy maintenance\u003c\/li\u003e\n\u003cli\u003eIncludes curved backing plate for mast mounting\u003c\/li\u003e\n\u003cli\u003eSuitable for a wide range of mast sizes\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant construction\u003c\/li\u003e\n\u003cli\u003eDesigned for smooth and efficient wire routing\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSheave Options:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAcetal Plain Bearing: Lightweight, low-maintenance option with a maximum working load of up to 400kg.\u003c\/li\u003e\n\u003cli\u003eStainless Steel Ball Bearing: Low-friction option for maximum performance and fast-running systems, with a maximum working load of up to 500kg.\u003c\/li\u003e\n\u003cli\u003eStainless Steel Plain Bearing: Heavy-duty option for highly statically loaded applications, with a maximum working load of up to 600kg.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Plain \/ Acetal","offer_id":57196894781815,"sku":"A4438-5415-AP","price":47.66,"currency_code":"GBP","in_stock":true},{"title":"Plain \/ Steel","offer_id":57196894814583,"sku":"A4438-5415-SP","price":45.12,"currency_code":"GBP","in_stock":true},{"title":"Dynamic \/ Steel","offer_id":57196894847351,"sku":"A4438-5415-SS","price":49.35,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A4438-5415G-TOP.jpg?v=1781801784"},{"product_id":"38mm-exit-sheave-box","title":"38mm Exit Sheave Box","description":"\u003cdiv\u003e\n\u003ch3\u003e38mm Exit Sheave Box\u003c\/h3\u003e\n\u003cp\u003eDesigned to improve the efficiency and durability of rigging systems, this 38mm Exit Sheave Box provides smooth and reliable rope or wire routing for masts, decks, and other marine applications. Manufactured from CNC-machined marine-grade aluminium, it features a removable axle pin for simple maintenance or sheave replacement, with a curved backing plate included for mounting to the leading edge of a mast.\u003c\/p\u003e\n\u003cp\u003eAvailable with a choice of sheave options, the design helps minimise wear on halyards, extending rope life while ensuring efficient performance.\u003c\/p\u003e\n\u003ch4\u003eKey Features:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eCNC-machined marine-grade aluminium body\u003c\/li\u003e\n\u003cli\u003eRemovable axle pin for easy maintenance\u003c\/li\u003e\n\u003cli\u003eIncludes curved backing plate for mast mounting\u003c\/li\u003e\n\u003cli\u003eSuitable for rope and wire applications\u003c\/li\u003e\n\u003cli\u003eOptimised design to reduce halyard wear\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant construction\u003c\/li\u003e\n\u003cli\u003eIdeal for masts, decks, and other marine installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eSheave Options:\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAcetal Plain Bearing: Lightweight, low-maintenance option suitable for rope and wire applications.\u003c\/li\u003e\n\u003cli\u003eDynamic Bearing: Features patented Dynamic Bearing Technology for exceptionally low friction and smooth operation. Ideal for fast-running systems and rope applications.\u003c\/li\u003e\n\u003cli\u003eStainless Steel Plain Bearing: Heavy-duty option designed for highly statically loaded applications. Suitable for rope and wire use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Allen","offers":[{"title":"Plain \/ Acetal","offer_id":57196894880119,"sku":"A4438-5818-AP","price":47.66,"currency_code":"GBP","in_stock":true},{"title":"Plain \/ Steel","offer_id":57196894912887,"sku":"A4438-5818-SP","price":45.12,"currency_code":"GBP","in_stock":true},{"title":"Dynamic \/ Steel","offer_id":57196894945655,"sku":"A4438-5818-SS","price":49.35,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0983\/7087\/9863\/files\/A4438-5818S20B-3.jpg?v=1781801785"}],"url":"https:\/\/allenbrothers.co.uk\/collections\/sheave-boxes.oembed","provider":"Allen | Performance Sailing Hardware","version":"1.0","type":"link"}