{"title":"Pulleys \u0026 Mechanical Advantage Systems","description":null,"products":[{"product_id":"njtx-159","title":"Aluminum Alloy Compact Professional Pulley Series","description":"\u003cp\u003eA series of high-efficiency, compact 7075 aluminum alloy pulleys designed for hauling systems, load deviation redirection, arboriculture climbing, and cave rescue. All 5 models in the series feature sealed micro ball bearings, achieving mechanical efficiency of over 90%; the attachment points are beveled and enlarged to be compatible with most carabiners on the market, allowing the sleeves of automatic locking carabiners to pass through. Perfectly compatible with Prusik hitches to build progress-capture hauling systems with a one-way braking function.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eSealed Micro Ball Bearings\u003c\/b\u003e: High-speed, low-friction design with a mechanical efficiency of ≥90%, significantly reducing friction loss during dragging and lifting of heavy loads.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003ePrusik Hitch Compatible Profile\u003c\/b\u003e: The smooth transition between the side plates and the sheave allows Prusik loops to lie flat against the side plate edge, efficiently enabling one-way progress capture.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eEnlarged Attachment Points for Unobstructed Passage\u003c\/b\u003e: The attachment holes feature an expanded beveled design, allowing the sleeve of bulky automatic locking carabiners to pass through smoothly without snagging or friction.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eThree Classic Mechanical Configurations\u003c\/b\u003e:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eFixed Side Plate\u003c\/b\u003e: No moving structural parts, providing extreme stability and durability, with dedicated bottom holes for Maillon Rapide links and anti-loss cords.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eSwing Side Plate\u003c\/b\u003e: The side plates can be rotated, allowing for quick installation at any point along the rope without the need to thread the rope end.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e3-Hole Multi-functional\u003c\/b\u003e: Functions as both a rigging plate and a pulley, with multiple 16mm attachment holes for multi-point anchoring and complex hauling system assembly.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eComparison of All 5 Specifications\u003c\/h3\u003e\n\u003col start=\"1\"\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e【Fixed Side Plate Single Pulley | approx. 90g】\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eFeatures\u003c\/b\u003e: Fixed side plate structure; the bottom connection point accommodates Maillon Rapide links for compound pulley systems; side plate includes a small hole for a tether cord.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eSpecs\u003c\/b\u003e: Breaking Strength 22kN | Sheave Diameter 27mm | Compatible Rope Diameter 7–11 mm | Weight approx. 90g\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e【Swing Side Plate Compact Pulley (20mm Sheave) | approx. 84g】\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eFeatures\u003c\/b\u003e: Classic swing side plate, compact volume, extremely convenient for mid-line installation; versatile for both hauling and redirection.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cp\u003e\u003cb\u003eSpecs\u003c\/b\u003e: Breaking Strength 22kN | Sheave Diameter 20mm | Compatible Rope Diameter 8–13 mm | Weight approx. 84g\u003c\/p\u003e\n\n\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e【Swing Side Plate Mid-size Pulley (Broad Rope Compatibility) | approx. 84g】\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eFeatures\u003c\/b\u003e: Same classic swing side plate structure, compatible with ropes up to 13mm, providing high versatility for hauling systems.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eSpecs\u003c\/b\u003e: Breaking Strength 22kN | Compatible Rope Diameter 8–13 mm | Weight approx. 84g\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e【Swing Side Plate Ultralight Compact Pulley (High-Strength Upgrade) | approx. 76g】\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eFeatures\u003c\/b\u003e: 76g ultra-lightweight, 20mm enlarged attachment hole; WLL 5kN \/ MBS 24kN \/ Tested breaking strength up to 32kN. \u003ci\u003e(Note: For fiber ropes only, not for steel cables)\u003c\/i\u003e\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eSpecs\u003c\/b\u003e: Working Load Limit 5kN | Breaking Strength 32kN | Compatible Rope Diameter 7–14 mm | Weight approx. 76g\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e【3-Hole Swing Side Plate Multi-functional Pulley | approx. 150g】\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eFeatures\u003c\/b\u003e: Three independent 16mm top attachment points, serving as both a rigging plate and a pulley; ideal for tree climbing, single-rope rescue, and heavy-duty systems.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cp\u003e\u003cb\u003eSpecs\u003c\/b\u003e: WLL 5kN | Recommended Load 36kN | Breaking Strength 43.1kN | Sheave Diameter 28mm | Compatible Rope Diameter 7–14 mm | Weight approx. 150g\u003c\/p\u003e\n\n\u003ctable width=\"100%\"\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\n\n\u003cp\u003e\u003cb\u003eSpecifications Summary Table\u003c\/b\u003e\u003c\/p\u003e\n\n\u003ctable\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cstrong\u003eSide Plate Type\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cstrong\u003eRope Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cstrong\u003eBreaking\/Working Load\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cstrong\u003eEfficiency\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003e1. Fixed Side Plate\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003eFixed (incl. tether\/Maillon holes)\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003e7 – 11 mm\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003eBreaking 22kN\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003e≥ 90%\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003eapprox. 90g\u003c\/span\u003e\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003e2. Swing Side Plate Compact (20mm sheave)\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003eDouble Swing\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003e8 – 13 mm\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003eBreaking 22kN\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003e≥ 90%\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003eapprox. 84g\u003c\/span\u003e\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003e3. Swing Side Plate Compact (Universal)\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003eDouble Swing\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003e8 – 13 mm\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003eBreaking 22kN\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003e≥ 90%\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003eapprox. 84g\u003c\/span\u003e\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003e4. Swing Side Plate Ultralight High-Strength\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003eDouble Swing (20mm hole)\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003e7 – 14 mm\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003eWLL 5kN \/ Breaking 32kN\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003e≥ 90%\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003eapprox. 76g\u003c\/span\u003e\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e\u003cspan\u003e\u003cb\u003e5. 3-Hole Swing Side Plate Multi-functional\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003eSwing Plate + 3 holes\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003e7 – 14 mm\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003eWLL 5kN \/ Breaking 43.1kN\u003c\/span\u003e\u003c\/td\u003e\n\n\u003ctd\u003e\u003cspan\u003e≥ 90%\u003c\/span\u003e\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\n\n\n\u003c\/ol\u003e","brand":"NJTX","offers":[{"title":"Fixed side plate single pulley (90g \/ sheave diameter 27mm)","offer_id":45810006622343,"sku":"J016","price":129.0,"currency_code":"HKD","in_stock":true},{"title":"Mobile Side Plate Compact Type (84g \/ Sheave Diameter 20mm)","offer_id":45829560860807,"sku":"J017","price":79.0,"currency_code":"HKD","in_stock":true},{"title":"3-hole side swing pulley multifunctional (150g \/ MBS 43.1kN)","offer_id":45829560959111,"sku":"J022","price":118.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0760\/1740\/1991\/files\/Page14_Img01_IM222_66e45ed7-82c2-4ce2-aad6-2ca8d5cabaaf.jpg?v=1789035720"},{"product_id":"njtx-167","title":"Aluminum Alloy 360° Universal Parallel Pulley Series","description":"\u003cp\u003eA 360° swivel parallel multi-sheave pulley designed specifically for heavy-duty rope rescue, hauling systems, and tripod\/multi-pod lifting systems. It supports the rapid setup of high-mechanical advantage systems such as 4:1 and 5:1, and is widely used for fine-tuning stretcher orientation, lifting and transferring heavy loads, and controlled lowering. The integrated 360° smooth-swivel top attachment point allows for self-adaptive orientation based on the hauling angle, effectively eliminating rope tangling, flange abrasion, and uneven loading when using parallel lines, significantly improving rope operation efficiency.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e4:1 \/ 5:1 High-Advantage System Hub\u003c\/b\u003e: The parallel double and triple sheave structure allows ropes to enter and exit in parallel without overlapping, drastically reducing friction loss and simplifying the setup of high-advantage hauling systems.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e360° Swivel Self-Adaptive Attachment\u003c\/b\u003e: The top swivel ring rotates instantly to align with the direction of the load, preventing rope twisting, edge abrasion, or jamming.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eVersatile Rescue Adaptation\u003c\/b\u003e: Highly suitable for fine-tuning the balance\/tilt of rescue stretchers, anchoring at the top of rescue tripods, and for the lifting and controlled lowering of heavy loads.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eHigh-Visibility Finish\u003c\/b\u003e: Features high-saturation, job-site identification colors (vibrant orange for the double pulley \/ bright yellow for the triple pulley) for rapid identification of sheave configuration in complex systems or low-light environments.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eRugged, Wear-Resistant Construction\u003c\/b\u003e: Precision-crafted from high-strength aluminum alloy, the body is impact-resistant and durable, ensuring smooth and stable performance under heavy lifting loads.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eComparison of Models and Applications\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e[Parallel Double Pulley | Orange]\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eStructural Features\u003c\/b\u003e: Parallel double sheave configuration; compact and agile design.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eRecommended Applications\u003c\/b\u003e: 4:1 mechanical advantage hauling systems, dual-point stretcher orientation control, and moving anchor redirection .\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e[Parallel Triple Pulley | Yellow]\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eStructural Features\u003c\/b\u003e: Parallel triple sheave configuration, providing additional rope pathways.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eRecommended Applications\u003c\/b\u003e: 5:1 or higher mechanical advantage heavy-duty hauling systems, single-point heavy lifting for deep-well\/high-altitude operations, and complex block-and-tackle hubs.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"NJTX","offers":[{"title":"Double Pulley - Orange (Suitable for 4:1 system)","offer_id":45810007081095,"sku":"J019","price":400.0,"currency_code":"HKD","in_stock":true},{"title":"Parallel Triple Pulley - Yellow (Suitable for 5:1 system)","offer_id":45829430870151,"sku":"J020","price":440.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0760\/1740\/1991\/files\/Page14_Img12_IM233_50de4732-3cd6-4ff0-a532-ef189944ff95.jpg?v=1789033795"},{"product_id":"njtx-171","title":"Aluminum Alloy Heart-Shaped Double Pulley Series","description":"\u003cp\u003eA professional series of heart-shaped tandem pulleys designed for Adventure Parks, forest high ropes courses, zip lines, and rope rescue traverses. The pulleys feature high-wear-resistant stainless steel sheaves that are compatible with both high-strength nylon ropes and rigid steel cables, offering exceptional abrasion resistance. Equipped with precision-sealed ball bearings, they provide smooth, low-friction gliding with a mechanical efficiency of over 90%. The attachment holes are specially enlarged with chamfered edges, allowing various auto-locking carabiners and their sleeves to pass through directly, making the setup of lanyards and backup fall arrest systems extremely convenient.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eUniversal Stainless Steel Sheaves for Steel Cable \/ Fiber Rope\u003c\/b\u003e: High-hardness stainless steel pulleys are durable, wear-resistant, and resistant to cutting and scarring, making them fully compatible with both metal cables and fiber ropes ≤13mm.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003ePrecision-Sealed Ball Bearings\u003c\/b\u003e: Featuring high rotational speed and low friction, these bearings offer a mechanical transmission efficiency of ≥90%, ensuring stable and quiet performance on long-span zip lines and horizontal traverses.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eUnobstructed Carabiner Passage\u003c\/b\u003e: Enlarged holes allow large three-stage auto-locking gates and sleeves to pass through directly, eliminating the need for tedious unhooking and ensuring smooth transitions.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eHeart-Shaped Anti-Tilt Geometry\u003c\/b\u003e: The dual-sheave tandem design accurately locks onto the track, preventing tilting or jamming during movement and providing excellent balance.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eDual Safety Attachment Layout\u003c\/b\u003e: Provides a main travel attachment point and a backup fall arrest eyelet, complying with redundancy protection standards for outdoor high-altitude rope activities.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eExplanation of the Two Hole Configurations\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e【Tri-Eye Heart-Shaped Tandem Pulley (4-Hole \/ Professional Flagship Model)】\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eEquipped with 4 attachment holes for high versatility. Features 2 enlarged main carabiner holes in the center (allowing auto-locking sleeves to pass through smoothly), with additional auxiliary positioning holes at the top and bottom for convenient simultaneous connection of main lanyards, backup tow lines, and braking systems.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eStrength: Breaking Strength 36kN | Weight: Approx. 313g | Sheave Diameter: 27mm\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e【Heart-Shaped Tandem Pulley (Classic Two-Hole Model - Black \/ Silver)】\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eClassic heart-shaped design with upper and lower dual holes. The top hole is 18mm for positioning, and the bottom hole is an enlarged 20mm (supporting auto-locking gate passage). Weighing only about 266g, it is exceptionally compact and agile.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eStrength: Working Load 22kN | Weight: Approx. 266g | Sheave Diameter: 26mm\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eSpecifications\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eMain Material\u003c\/b\u003e: 7075 Aerospace-grade Aluminum Alloy (side plates), Stainless Steel (sheaves, axle)\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eApplicable Media\u003c\/b\u003e: Metal cables, fiber ropes (rope diameter ≤ 13mm)\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eBearing Type\u003c\/b\u003e: Sealed Ball Bearing\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eMechanical Efficiency\u003c\/b\u003e: ≥ 90%\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eTesting Standard\u003c\/b\u003e: XF494-2023\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"NJTX","offers":[{"title":"Double-hole heart-shaped (Black \/ 2 holes \/ 22kN)","offer_id":45829408063623,"sku":"J047A","price":129.0,"currency_code":"HKD","in_stock":true},{"title":"Double-Hole Heart Shape (Silver \/ 2 holes \/ 22kN)","offer_id":45843964035207,"sku":"J047B","price":129.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0760\/1740\/1991\/files\/Page15_Img03_IM238_bea48772-5381-429d-908a-c76a21f582f0.jpg?v=1789033487"},{"product_id":"njtx-173","title":"Aluminum Alloy 360° Universal Side-Opening Ball Bearing Pulley","description":"\u003cp\u003eA professional swivel side-opening pulley designed specifically for complex rope rescue, hauling systems, and high-altitude zip lines. It integrates a 360° smooth-rotating swivel that self-adjusts to the direction of force, effectively eliminating edge wear and rope twisting. The side plate features a double-action locking mechanism, allowing for safe installation and removal at any point on the rope, even while under tension. Equipped with sealed precision ball bearings, it delivers a mechanical efficiency of over 90%.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e360° Swivel Self-Adjusting Axis\u003c\/b\u003e: The pulley automatically aligns  with the angle of tension, preventing rope twisting, tangling, or uneven edge wear during hauling, and ensuring smoother operation on traversing zip lines.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eDual-Action Safety Locking Side Plate\u003c\/b\u003e: Requires a two-step pressing action to open, preventing accidental opening due to impact or friction during operation. Allows for mid-line installation and removal on tensioned ropes without disconnecting the carabiner.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eSealed Precision Ball Bearings\u003c\/b\u003e: High rotation speed with low friction, providing a mechanical efficiency of ≥90%, significantly reducing hauling resistance and extending service life.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eExtra-Large Attachment Hole\u003c\/b\u003e: The main attachment point features a 24mm diameter, allowing for up to three carabiners to be clipped in simultaneously, or direct integration with webbing or slings.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eHigh-Load Capacity\u003c\/b\u003e: Working Load Limit (WLL) of 22kN, Minimum Breaking Strength (MBS) of 36kN, and compatible with ropes up to 13mm in diameter.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eSingle and Double Pulley Structure Description\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e[Swivel Single Pulley]\u003c\/b\u003e: Weighs approximately 290g; compact and agile structure suitable for single-line redirection, mobile anchors, and zip line sliding.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e[Swivel Double Pulley]\u003c\/b\u003e: Weighs approximately 460g; features a parallel double-pulley structure. Includes a 24mm large hole at the top and an additional 16mm auxiliary attachment hole at the bottom, ideal for connecting hand ascenders to build mechanical advantage systems (such as 4:1 or 5:1 hauling systems) or for dual-rope configurations.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eSpecifications\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eMain Material\u003c\/b\u003e: 7075 Aircraft-grade Aluminum Alloy (Body\/Side Plate), Stainless Steel (Sheave\/Axle)\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eStrength Rating\u003c\/b\u003e: WLL 22kN | MBS 36kN\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eMechanical Efficiency\u003c\/b\u003e: ≥ 90%\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eBearing Type\u003c\/b\u003e: Sealed Ball Bearing\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eCompatible Rope Diameter\u003c\/b\u003e: ≤ 13mm\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eSheave Specifications\u003c\/b\u003e: 37mm Center Diameter\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eTesting Standard\u003c\/b\u003e: XF494-2023\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"NJTX","offers":[{"title":"Universal swivel pulley","offer_id":45810007277703,"sku":"J077","price":395.0,"currency_code":"HKD","in_stock":true},{"title":"Universal double pulley","offer_id":45829380178055,"sku":"J078","price":550.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0760\/1740\/1991\/files\/Page15_Img01_IM236_16ffac9c-a2da-4757-8ae0-1947004275d9.jpg?v=1789032985"},{"product_id":"njtx-195","title":"Professional high-altitude rescue releasable mechanical advantage pulley system kit","description":"\u003cp\u003eA professional-grade integrated Pre-rigged Hauling System designed for rope rescue, confined space hoisting, tripod rescue lifting, precise stretcher orientation adjustment, and heavy load transfers in high-angle operations. The entire system comes pre-rigged in a portable tactical leg bag, ready for immediate use, ensuring components remain integrated and preventing loss.\u003c\/p\u003e\n\u003cp\u003eThe core features a patented eccentric cam mechanical self-locking device that automatically locks to prevent rope slippage during hauling. It includes a \"Dead-man's brake\" for controlled descent and instant stopping upon release. The foldable release handle supports both left and right-hand orientation and remote tether release. The pulleys are equipped with 360° swivels and sealed ball bearings, effectively eliminating rope twisting and tangling during parallel operation, while achieving a mechanical efficiency of over 90%.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eKey Features\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eIntegrated, Ready-to-Use (includes carry leg bag)\u003c\/b\u003e: The entire system is pre-rigged and tested; simply attach to an anchor point to operate, preventing fumbling with ropes or losing components in emergency rescue scenarios.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eQuick-Switch Mechanical Advantage (simply invert suspension)\u003c\/b\u003e:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e4:1 Dual Pulley Model\u003c\/b\u003e: Standard orientation provides a 4:1 advantage, while inverting the system creates a 5:1 configuration.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e6:1 Compound Model\u003c\/b\u003e: Features a triple-sheave pulley, allowing for flexible switching between 5:1 or 6:1 high-ratio hauling.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eEccentric Cam Self-Locking + Anti-Slip Safety Mechanism\u003c\/b\u003e: Automatically locks during the haul to prevent back-slippage; lowering is smooth and controlled, with instant locking when the handle is released.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eFlexible Folding Handle + Remote Release\u003c\/b\u003e:\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eThe handle can be adjusted for left\/right orientation via a micro-switch, adapting to overhead anchor points or ground-based operation.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003eThe top of the handle features an auxiliary attachment point for cord-based remote release.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e360° Swivel + Sealed Ball Bearings\u003c\/b\u003e: Integrated top swivel automatically aligns with the load direction to prevent twisting; precision sealed ball bearings ensure maximum efficiency of ≥90%.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eSpecifications\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eMain Material\u003c\/b\u003e: 7075 Aviation Aluminum Alloy, High-Strength Stainless Steel, Specialized High-Strength Wear-Resistant Rope\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003ePulley Strength\u003c\/b\u003e: Breaking Strength 36kN | Working Load Limit (WLL) 5kN\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003ePulley Diameter\u003c\/b\u003e: 25mm\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eMechanical Efficiency\u003c\/b\u003e: ≥ 90% (sealed ball bearings)\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eTesting Standard\u003c\/b\u003e: XF494-2023\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eApplications\u003c\/b\u003e: Mountain\/Confined Space Rescue, Tripod Heavy Load Lifting\/Lowering, Stretcher Orientation Adjustment, Industrial High-Angle Load Reduction Systems\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eComparison of Two Kit Configurations\u003c\/h3\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e[4:1 \/ 5:1 Pulley System Kit]\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eIncluded\u003c\/b\u003e: Release-capable double pulley ×1, parallel double pulley ×1, dedicated high-strength rope (17m or 20m), specialized tactical leg bag ×1\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eTotal Weight\u003c\/b\u003e: Approx. 1685g (including bag and rope)\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eRecommended Uses\u003c\/b\u003e: Stretcher horizontal\/vertical orientation adjustment, standard tripod hoisting\/lowering, lightweight rapid response.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003e[6:1 \/ 5:1 High-Ratio Pulley System Kit]\u003c\/b\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eIncluded\u003c\/b\u003e: Release-capable double pulley ×1, parallel triple pulley ×1, dedicated high-strength rope (30m), specialized tactical leg bag ×1\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eTotal Weight\u003c\/b\u003e: Approx. 2040g (including bag and rope)\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eRecommended Uses\u003c\/b\u003e: Deep well\/gorge long-distance hauling, easy single-person heavy load or two-person load recovery.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"NJTX","offers":[{"title":"4:1 \/ 5:1 Hauling Kit (17m rope length \/ approx. 1685g)","offer_id":45810008850567,"sku":"TL41A","price":2050.0,"currency_code":"HKD","in_stock":true},{"title":"4:1 \/ 5:1 Kit (20m rope length \/ approx. 1750g)","offer_id":45830086393991,"sku":"TL41","price":2400.0,"currency_code":"HKD","in_stock":true},{"title":"6:1 \/ 5:1 Hauling System Kit (30m rope length \/ approx. 2040g)","offer_id":45830086426759,"sku":"TL61","price":2650.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0760\/1740\/1991\/files\/Page15_Img05_IM240_0fa41ee0-9f23-435f-a68e-e4627a5d1fc3.jpg?v=1789037161"}],"url":"https:\/\/treeholic.co\/en\/collections\/%e6%bb%91%e8%bc%aa%e8%88%87%e5%80%8d%e5%8a%9b%e6%8f%90%e6%8b%89%e7%b3%bb%e7%b5%b1-pulleys-hauling.oembed","provider":"Treeholic","version":"1.0","type":"link"}