{"title":"KF 2:1 Blocks","description":"","products":[{"product_id":"optional-2-1-block-kf3-0","title":"OPTIONAL 2:1 BLOCK KF3.0","description":"\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eOptional 2:1 block for KF3.0 and KF3.0 Large swivel.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe optional 2:1 block is used on the furling swivel to divise the forces when setting up and tensioning the sail.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003ctable class=\"data-table spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRef\u003c\/td\u003e\n\u003ctd\u003ePF330300\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.158 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoat size\u003c\/td\u003e\n\u003ctd\u003e30 to 50″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorkload\u003c\/td\u003e\n\u003ctd\u003e3,00 T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBreaking load\u003c\/td\u003e\n\u003ctd\u003e6,00 T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax line diameter (mm)\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCutting length (mm)\u003c\/td\u003e\n\u003ctd\u003e51\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall height (mm)\u003c\/td\u003e\n\u003ctd\u003e73,9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth (mm)\u003c\/td\u003e\n\u003ctd\u003e36\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cspan\u003eStrengths\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e– Structural pulley. It is integral with the swivel. It is not a simple pulley connected to the swivel.\u003cbr\u003e– Efficient even under high loads\u003cbr\u003e– The pulley is fitted with a bearing and therefore offers much less friction than a 2: 1 or 3: 1 friction sheave\u003cbr\u003e– Allows the use of a smaller diameter halyard (Often obligatory beyond KF8)\u003cbr\u003e– Allows to divide the efforts by 2 and therefore to use a smaller ascender\u003cbr\u003e– We produce custom haul pulleys according to your specifications\u003cbr\u003e– A haul pulley also allows to have 2 times more power to tension the halyard. An important point for the sails up close.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eTips\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e– Be careful, our optional 2:1 blocks are equipped with pins and not with a fast pins\u003cbr\u003e– The use of an optional 2:1 block implies having an attachment point in the mast and accepting the principle of having twice as many rope length during operations (and when stowing the deck or cockpit …)\u003cbr\u003e– The efficient alternative to an optional 2:1 block is the use of a hook (no wear or lengthening of the halyard), no need blocker, rapid hoisting because the halyard is not hauled up. The tension is then taken up from below.\u003cbr\u003e– The major drawback of an optional 2:1 block is not the block itself but the quantity of rope which is doubled. The hoisting is twice as long. At the end of the operation, double the length of the line must be stored.\u003cbr\u003e– It is possible to use a friction sheave on the swivel but as its name suggests, it is an accessory that brings friction. For long lengths, we strongly recommend our block. Operate faster and with less effort.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDocumentation\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca rel=\"noopener noreferrer\" href=\"https:\/\/www.karver-systems.com\/wp-admin\/admin-ajax.php?action=karver_document\u0026amp;f=UERGLzFfS0YvMlRPMSBCTE9DSyBLRjMuMC5QREY=\u0026amp;key=ac0fda041c51d062d50286bfb21c649258a87838\" target=\"_blank\"\u003eOPTIONAL 2:1 BLOCK KF3.0\u003c\/a\u003e\u003c\/p\u003e","brand":"Karver Systems","offers":[{"title":"Default Title","offer_id":44724802650415,"sku":"PF330300","price":805.18,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/4484\/0239\/products\/2TO1BLOCKKF3.0.webp?v=1679345684"},{"product_id":"optional-2-1-block-kf4-5","title":"OPTIONAL 2:1 BLOCK KF4.5","description":"\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eOptional 2:1 block for KF4.5 swivel.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe optional 2:1 block is used on the furling swivel to divise the forces when setting up and tensioning the sail.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003ctable class=\"data-table spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRef\u003c\/td\u003e\n\u003ctd\u003ePF330450\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.422 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoat size\u003c\/td\u003e\n\u003ctd\u003e40 to 80″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorkload\u003c\/td\u003e\n\u003ctd\u003e4,50 T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBreaking load\u003c\/td\u003e\n\u003ctd\u003e6,00 T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax line diameter (mm)\u003c\/td\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCutting length (mm)\u003c\/td\u003e\n\u003ctd\u003e66,7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall height (mm)\u003c\/td\u003e\n\u003ctd\u003e101,7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth (mm)\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cspan\u003eStrengths\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e– Structural pulley. It is integral with the swivel. It is not a simple pulley connected to the swivel.\u003cbr\u003e– Efficient even under high loads\u003cbr\u003e– The pulley is fitted with a bearing and therefore offers much less friction than a 2: 1 or 3: 1 friction sheave\u003cbr\u003e– Allows the use of a smaller diameter halyard (Often obligatory beyond KF8)\u003cbr\u003e– Allows to divide the efforts by 2 and therefore to use a smaller ascender\u003cbr\u003e– We produce custom haul pulleys according to your specifications\u003cbr\u003e– A haul pulley also allows to have 2 times more power to tension the halyard. An important point for the sails up close.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eTips\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e– Be careful, our optional 2:1 blocks are equipped with pins and not with a fast pins\u003cbr\u003e– The use of an optional 2:1 block implies having an attachment point in the mast and accepting the principle of having twice as many rope length during operations (and when stowing the deck or cockpit …)\u003cbr\u003e– The efficient alternative to an optional 2:1 block is the use of a hook (no wear or lengthening of the halyard), no need blocker, rapid hoisting because the halyard is not hauled up. The tension is then taken up from below.\u003cbr\u003e– The major drawback of an optional 2:1 block is not the block itself but the quantity of rope which is doubled. The hoisting is twice as long. At the end of the operation, double the length of the line must be stored.\u003cbr\u003e– It is possible to use a friction sheave on the swivel but as its name suggests, it is an accessory that brings friction. For long lengths, we strongly recommend our block. Operate faster and with less effort.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDocumentation\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.karver-systems.com\/wp-admin\/admin-ajax.php?action=karver_document\u0026amp;f=UERGLzFfS0YvMlRPMSBCTE9DSyBLRjQuNS5QREY=\u0026amp;key=ac0fda041c51d062d50286bfb21c649258a87838\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eOPTIONAL 2:1 BLOCK KF4.5\u003c\/a\u003e\u003c\/p\u003e","brand":"Karver Systems","offers":[{"title":"Default Title","offer_id":44724813758767,"sku":"PF330450","price":707.93,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/4484\/0239\/products\/2TO1BLOCKKF4.5.webp?v=1679345859"},{"product_id":"optional-2-1-block-kf6-0","title":"OPTIONAL 2:1 BLOCK KF6.0","description":"\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eOptional 2:1 block for KF6.0 swivel.\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe optional 2:1 block is used on the furling swivel to divise the forces when setting up and tensioning the sail.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eSpecifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003ctable class=\"data-table spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRef\u003c\/td\u003e\n\u003ctd\u003ePF330600\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.422 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoat size\u003c\/td\u003e\n\u003ctd\u003e40 to 80″\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorkload\u003c\/td\u003e\n\u003ctd\u003e6,00 T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBreaking load\u003c\/td\u003e\n\u003ctd\u003e12,00 T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax line diameter (mm)\u003c\/td\u003e\n\u003ctd\u003e16\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCutting length (mm)\u003c\/td\u003e\n\u003ctd\u003e66,7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall height (mm)\u003c\/td\u003e\n\u003ctd\u003e101,7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth (mm)\u003c\/td\u003e\n\u003ctd\u003e40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cspan\u003eStrengths\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e– Structural pulley. It is integral with the swivel. It is not a simple pulley connected to the swivel.\u003cbr\u003e– Efficient even under high loads\u003cbr\u003e– The pulley is fitted with a bearing and therefore offers much less friction than a 2: 1 or 3: 1 friction sheave\u003cbr\u003e– Allows the use of a smaller diameter halyard (Often obligatory beyond KF8)\u003cbr\u003e– Allows to divide the efforts by 2 and therefore to use a smaller ascender\u003cbr\u003e– We produce custom haul pulleys according to your specifications\u003cbr\u003e– A haul pulley also allows to have 2 times more power to tension the halyard. An important point for the sails up close.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eTips\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e– Be careful, our optional 2:1 blocks are equipped with pins and not with a fast pins\u003cbr\u003e– The use of an optional 2:1 block implies having an attachment point in the mast and accepting the principle of having twice as many rope length during operations (and when stowing the deck or cockpit …)\u003cbr\u003e– The efficient alternative to an optional 2:1 block is the use of a hook (no wear or lengthening of the halyard), no need blocker, rapid hoisting because the halyard is not hauled up. The tension is then taken up from below.\u003cbr\u003e– The major drawback of an optional 2:1 block is not the block itself but the quantity of rope which is doubled. The hoisting is twice as long. At the end of the operation, double the length of the line must be stored.\u003cbr\u003e– It is possible to use a friction sheave on the swivel but as its name suggests, it is an accessory that brings friction. For long lengths, we strongly recommend our block. Operate faster and with less effort.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eDocumentation\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.karver-systems.com\/wp-admin\/admin-ajax.php?action=karver_document\u0026amp;f=UERGLzFfS0YvMlRPMSBCTE9DSyBLRjYuMC5QREY=\u0026amp;key=e62c3b0c6f25c0b1283bad454a3ae1af794e18c1\" rel=\"noopener noreferrer\" target=\"_blank\"\u003eOPTIONAL 2:1 BLOCK KF6.0\u003c\/a\u003e\u003c\/p\u003e","brand":"Karver Systems","offers":[{"title":"Default Title","offer_id":44724825260335,"sku":"PF330600","price":707.93,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/4484\/0239\/products\/2TO1BLOCKKF6.0.webp?v=1679346147"},{"product_id":"optional-2-1-block-kf8-alu","title":"OPTIONAL 2:1 BLOCK KF8 (ALU)","description":"\u003cp\u003e\u003cspan\u003eOptional 2:1 block for KF8.0 swivel.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003eThe optional 2:1 block is used on the furling swivel to divise the forces when setting up and tensioning the sail.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv id=\"elementor-tab-title-3161\" class=\"elementor-tab-title elementor-tab-desktop-title elementor-active\" aria-selected=\"true\" data-tab=\"1\" role=\"tab\" aria-controls=\"elementor-tab-content-3161\" aria-expanded=\"true\" tabindex=\"0\"\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/div\u003e\n\u003ctable class=\"data-table spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRef\u003c\/td\u003e\n\u003ctd\u003ePF110030 [ALU]\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.496 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoat size\u003c\/td\u003e\n\u003ctd\u003e40 to 90 ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorkload\u003c\/td\u003e\n\u003ctd\u003e8,00 T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBreaking load\u003c\/td\u003e\n\u003ctd\u003e16,00 T\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eStrengths\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e– Structural pulley. It is integral with the swivel. It is not a simple pulley connected to the swivel.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e– Efficient even under high loads\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e– The pulley is fitted with a bearing and therefore offers much less friction than a 2: 1 or 3: 1 friction sheave\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e– Allows the use of a smaller diameter halyard (Often obligatory beyond KF8)\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e– Allows to divide the efforts by 2 and therefore to use a smaller ascender\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e– We produce custom haul pulleys according to your specifications\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e– A haul pulley also allows to have 2 times more power to tension the halyard. An important point for the sails up close.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eK tips\u003c\/span\u003e\u003cbr\u003e\u003c\/strong\u003e\u003cspan\u003e– Be careful, our optional 2:1 blocks are equipped with pins and not with a fast pins\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e– The use of an optional 2:1 block implies having an attachment point in the mast and accepting the principle of having twice as many rope length during operations (and when stowing the deck or cockpit …)\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e– The efficient alternative to an optional 2:1 block is the use of a hook (no wear or lengthening of the halyard), no need blocker, rapid hoisting because the halyard is not hauled up. The tension is then taken up from below.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e– The major drawback of an optional 2:1 block is not the block itself but the quantity of rope which is doubled. The hoisting is twice as long. At the end of the operation, double the length of the line must be stored.\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e– If you want to know more about optional 2:1 blocks, see our KarverPedia article on the subject\u003c\/span\u003e\u003cbr\u003e\u003cspan\u003e– It is possible to use a friction sheave on the swivel but as its name suggests, it is an accessory that brings friction. For long lengths, we strongly recommend our block. Operate faster and with less effort.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cstrong\u003e\u003cspan\u003eDocumentation\u003c\/span\u003e\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"margin: 0in; font-family: Calibri; font-size: 11.0pt;\"\u003e\u003ca href=\"https:\/\/www.karver-systems.com\/wp-admin\/admin-ajax.php?action=karver_document\u0026amp;f=TWFya2V0aW5nLzEwMC9QUk9EVUNUX1NIRUVUX0tGX0VOLnBkZg==\u0026amp;key=203769b95a53483657dc8b0597441b39b86d510a\"\u003eOPTIONAL 2:1 BLOCK KF8 (ALU)\u003c\/a\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Alveussupply","offers":[{"title":"Default Title","offer_id":52041625796911,"sku":"PF330800","price":2604.08,"currency_code":"NZD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/4484\/0239\/files\/3TO1KF1.5_3dd05c98-cc76-4e94-adb4-e4183a7a18f0.jpg?v=1763619706"}],"url":"https:\/\/alveussupply.com\/collections\/kf-2-1-blocks-1.oembed","provider":"Alveus Supply","version":"1.0","type":"link"}