{"product_id":"petzl-tandem-pulley","title":"Petzl Tandem Pulley","description":"\u003cp\u003eThe Petzl Tandem Pulley is a double pulley specifically designed for Tyrolean traverses on ropes. Its high-quality aluminium sheaves are mounted on self-lubricating bushings, ensuring maximum efficiency. With the ability to accommodate up to three carabiners, it allows for smooth and easy manoeuvres.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eFeatures\u003cbr\u003e\n\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe aluminium sheaves are mounted on self-lubricating bushings, enhancing overall efficiency.\u003c\/li\u003e\n\u003cli\u003eThe device accommodates up to three carabiners, making it easier to use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eSpecifications\u003cbr\u003e\n\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"width: 99.9971%; height: 176.308px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"width: 36.0508%; height: 19.5898px;\"\u003eRope compatibility: diameter\u003c\/td\u003e\n\u003ctd style=\"width: 63.7059%; height: 19.5898px;\"\u003e13 mm or less\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"width: 36.0508%; height: 19.5898px;\"\u003eSheave diameter\u003c\/td\u003e\n\u003ctd style=\"width: 63.7059%; height: 19.5898px;\"\u003e21 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"width: 36.0508%; height: 19.5898px;\"\u003eBall bearings\u003c\/td\u003e\n\u003ctd style=\"width: 63.7059%; height: 19.5898px;\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"width: 36.0508%; height: 19.5898px;\"\u003eEfficiency\u003c\/td\u003e\n\u003ctd style=\"width: 63.7059%; height: 19.5898px;\"\u003e71 %\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"width: 36.0508%; height: 19.5898px;\"\u003eMaximum working load\u003c\/td\u003e\n\u003ctd style=\"width: 63.7059%; height: 19.5898px;\"\u003e10 kN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"width: 36.0508%; height: 19.5898px;\"\u003eMaximum allowable speed\u003c\/td\u003e\n\u003ctd style=\"width: 63.7059%; height: 19.5898px;\"\u003e10 m\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"width: 36.0508%; height: 19.5898px;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"width: 63.7059%; height: 19.5898px;\"\u003e195 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"width: 36.0508%; height: 19.5898px;\"\u003eCertification(s)\u003c\/td\u003e\n\u003ctd style=\"width: 63.7059%; height: 19.5898px;\"\u003eCE EN 12278, UKCA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5898px;\"\u003e\n\u003ctd style=\"width: 36.0508%; height: 19.5898px;\"\u003eInner Pack Count\u003c\/td\u003e\n\u003ctd style=\"width: 63.7059%; height: 19.5898px;\"\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eTechnology\u003cbr\u003e\n\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Notice\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/06868000004IFk0AAG\"\u003eDownload the PDF : technical-notice-TANDEM-TANDEM-SPEED-1 - 2.54 MB\u003c\/a\u003e\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDeclaration Of Conformity\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0685I000000iPv1QAE\"\u003eDownload the PDF : UE-Declaration-P21-Tandem - 0.20 MB\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0686800000GwAsWAAV\"\u003eDownload the PDF : UKCA-Declaration-P21-P21 SPE-TANDEM-TANDEM SPEED - 0.63 MB\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eTips for maintaining your equipment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/068Tx00000CgQ7GIAV\"\u003eDownload the PDF - 2.72 MB\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eInspection\u003cbr\u003e\n\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePPE inspection procedure\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/06868000002aB7rAAE\"\u003eDownload the PDF - 1.09 MB\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePPE checklist\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/06868000002aB8HAAU\"\u003eDownload the PDF - 0.20 MB\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch5\u003eTechnical Content\u003cbr\u003e\n\u003c\/h5\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow to Calculate Mechanical Advantage\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eA mechanical advantage haul system reduces the effort required to raise a load. The mechanical advantage obtained is based on the pulley effect.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\n\u003cp\u003e\u003cstrong\u003eWARNINGS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCarefully read the Instructions for Use used in this technical advice before consulting the advice itself. You must have already read and understood the information in the Instructions for Use to be able to understand this supplementary information.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eMastering these techniques requires specific training. Work with a professional to confirm your ability to perform these techniques safely and independently before attempting them unsupervised.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eWe provide examples of techniques related to your activity. There may be others that we do not describe here.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003e1. The Pulley Effect\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eIf we consider a load suspended on a rope, the rope passing through a pulley above the user, with the user's hand holding the rope on the other side of the pulley; any force applied to one end of the rope is transmitted to the other end of the rope, or, in this case, to the end of the rope on the other side of the pulley.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eIf the load weighs 100 kg, it is clear that the user must hold 100 kg on their side to hold the load. The two rope strands each exert a pull of 100 kg, so the pulley supports 200 kg.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"The pulley effect.\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFuc5AAD\" width=\"385\" height=\"252\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cem\u003e\u003cstrong\u003eNote\u003c\/strong\u003e: This theory is valid for an ideal pulley of 100% efficiency, which does not exist in the real world.In reality, pulley efficiencies range from about 50 % to 98 %.To simplify calculations, this discussion is limited to ideal pulleys.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003e2. Calculating Mechanical Advantage in Practice\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eThe efficiency (E) of a haul system indicates the force multiplier factor that you can exert on the rope.For example, if you are able to pull 20 kg maximum on a rope with your bare hands, a 3:1 haul system will enable you to raise a 60 kg mass.This reduction is obtained by increasing the amount of rope to be pulled: to raise a mass 1 meter with a 3:1 system, 3 m of rope must be pulled.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eThe efficiency (E) of a haul system may be calculated by adding the effects of each pulley.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eStart by drawing a simple diagram of the system, then show the pulling force F that the hand applies to the rope.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eTransmit the force F along the rope by adding the effects of each pulley.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003eWhen multiple rope strands are attached to the load (double pulley, rope clamp...), add the forces exerted by each strand.\u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e \u003c\/p\u003e\n\u003cp style=\"padding-left: 40px; text-align: left;\"\u003e\u003cstrong\u003e1:1 Haul System\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"width: 99.9971%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 31.978%;\"\u003e\u003cimg alt=\"1:1 haul system - 1\/3\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFucPAAT\" width=\"143\" height=\"252\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 33.8265%;\"\u003e\u003cimg alt=\"1:1 haul system - 2\/3\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFucjAAD\" style=\"display: block; margin-left: auto; margin-right: auto;\" width=\"173\" height=\"197\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 33.8265%;\"\u003e\u003cimg alt=\"1:1 haul system - 3\/3\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFucoAAD\" width=\"138\" height=\"248\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"padding-left: 40px; text-align: left;\"\u003e\u003cstrong\u003e2:1 Haul System\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"width: 99.9971%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 31.978%;\"\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto;\" height=\"240\" width=\"129\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFucyAAD\" alt=\"2:1 haul system - 1\/3\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 33.8265%;\"\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto;\" height=\"236\" width=\"160\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFudNAAT\" alt=\"2:1 haul system - 2\/3\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 33.8265%;\"\u003e\u003cimg style=\"display: block; margin-left: auto; margin-right: auto;\" height=\"251\" width=\"150\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFudXAAT\" alt=\"2:1 haul system - 3\/3\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"padding-left: 40px; text-align: left;\"\u003e\u003cstrong\u003e3:1 Haul System\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"width: 99.9971%;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 24.954%;\"\u003e\u003cimg alt=\"3:1 haul system - 1\/4\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFudcAAD\" width=\"105\" height=\"230\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 24.954%;\"\u003e\u003cimg alt=\"3:1 haul system - 2\/4\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFudhAAD\" width=\"120\" height=\"245\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 24.7691%;\"\u003e\u003cimg alt=\"3:1 haul system - 3\/4\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFudmAAD\" width=\"120\" height=\"240\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 24.7691%;\"\u003e\u003cimg alt=\"3:1 haul system - 4\/4\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFudrAAD\" width=\"116\" height=\"247\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cem\u003e\u003cstrong\u003eNote\u003c\/strong\u003e: The advantage of a 3:1 system is its ease of setup and that it can easily be converted to a complex system (7:1) with one additional pulley and some cord.\u003cbr\u003e\u003cbr\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003ctable width=\"100%\" style=\"width: 99.9971%; height: 337.773px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 337.773px;\"\u003e\n\u003ctd style=\"width: 31.978%; height: 337.773px;\"\u003e\u003cimg alt=\"7:1 haul system - 1\/3\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFue1AAD\" width=\"97\" height=\"319\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 33.8265%; height: 337.773px;\"\u003e\u003cimg alt=\"7:1 haul system - 2\/3\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFueGAAT\" style=\"display: block; margin-left: auto; margin-right: auto;\" width=\"173\" height=\"300\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 33.8265%; height: 337.773px;\"\u003e\u003cimg height=\"316\" width=\"176\" alt=\"7:1 haul system - 3\/3\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFueVAAT\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"padding-left: 40px; text-align: left;\"\u003e\u003cstrong\u003e4:1 Haul System\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"width: 99.9971%;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 24.954%;\"\u003e\u003cimg alt=\"4:1 haul system - 1\/4\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFuepAAD\" width=\"114\" height=\"268\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 24.954%;\"\u003e\u003cimg alt=\"4:1 haul system - 2\/4\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFuezAAD\" width=\"117\" height=\"269\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 24.7691%;\"\u003e\u003cimg alt=\"4:1 haul system - 3\/4\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFufJAAT\" style=\"display: block; margin-left: auto; margin-right: auto;\" width=\"127\" height=\"172\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 24.7691%;\"\u003e\u003cimg height=\"179\" width=\"128\" alt=\"4:1 haul system - 4\/4\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFufnAAD\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp style=\"padding-left: 40px; text-align: left;\"\u003e\u003cstrong\u003e5:1 Haul System\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"width: 99.9971%;\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 24.954%;\"\u003e\u003cimg alt=\"5:1 haul system - 1\/4\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFug2AAD\" width=\"111\" height=\"281\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 24.954%;\"\u003e\u003cimg alt=\"5:1 haul system - 2\/4\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFugCAAT\" width=\"121\" height=\"285\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 24.7691%;\"\u003e\u003cimg alt=\"5:1 haul system - 3\/4\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFugMAAT\" style=\"display: block; margin-left: auto; margin-right: auto;\" width=\"126\" height=\"220\"\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 24.7691%;\"\u003e\u003cimg height=\"236\" width=\"131\" alt=\"5:1 haul system - 4\/4\" src=\"https:\/\/www.petzl.com\/sfc\/servlet.shepherd\/version\/download\/0681r00000GFugbAAD\" style=\"display: block; margin-left: auto; margin-right: auto;\"\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Petzl","offers":[{"title":"Red","offer_id":46226734940387,"sku":"R056,P21","price":132.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1264\/3521\/files\/Petzl_Tandem_Pulley.png?v=1767834334","url":"https:\/\/www.outdooraction.com.au\/products\/petzl-tandem-pulley","provider":"Outdoor Action","version":"1.0","type":"link"}