Prusik cord diameter. Prusik Cord Diameter Guidelines.

Prusik cord diameter 6. The diameter of the cord should be 60-80% of the main rope diameter. 7mm) rope, a Prusik cord with a diameter between 8mm and 9mm is ideal. Aug 23, 2023 · Prusik Loops are usually made from ropes that are 3/16 – 5/16 inches (5-8 mm) in diameter. Most prusik cord is 5 – 8mm thick, however, you can also use a thicker cord, especially alongside thicker climbing ropes. For example, 6mm accessory cord is commonly used for prusik cords on 11mm climbing ropes. Or more specifically a ~20+ft piece of cord tied to itself, usually for anchor making. Using a thin cord means it tightens easily around the rope and is difficult to move around. 5mm) and full single ropes. Two color choices in each diameter allow you to use a separate color for each length prusik in a tandem prusik belay system. CONTACT US 800-513-7455 Mar 16, 2025 · Rope Size. Our prusiks are available in 3 lengths to match your hitch and rope. You will have to make the cord loop with a double fisherman’s knot or a triple fisherman’s knot before starting off with the tying procedure. com FREE DELIVERY possible on eligible purchases Dynamic Prusik cords were introduced to provide an added load absorbing element as part of a complete system. 0 kN, the Prusik cord may slip on the rope. Sep 12, 2012 · Regarding friction cord diameter, Treevolution says "friction hitch cords of 2-3mm diameter less than that of the lifeline performed most reliably. 42 Items . It is often made by tying the ends of cord with a Double Fisherman's Knot. The foot loop is then easily adjusted in length and position. The Autoblock Knot is used as a backup knot when rappelling. Jul 24, 2015 · I have 10. Please see the table below for maximum lengths available for order. " (in their tests). Typically, the diameter of the Prusik rope should be around 60% to 80% of that of the main rope to ensure good grip and functionality of the knot. There is no "right answer" to this. The 9-mm cord is the size preferred by rescuers who use cord for a Load-Releasing Hitch. If both the ropes are similar in size, the knot won’t grip well. 5mm diameter Beal Jammy. " Tied by wrapping the loop of cord around the main rope several times, the Prusik is most effective when the cord is smaller in diameter than the rope. 53. Prusik cords with the same high quality and long wear design as ACCESS Lifelines. Nov 4, 2016 · What diameter of cord is best? This depends on what ropes you normally climb on. Prusik cords are excellent for all your needs. 0 mm. Ideally, the diameter of the prusik cord should be no more than 70% of the main rope’s diameter. A thinner line will lock hard, and a wider line will not lock at all. These prusik and split tail ropes will work well for you, whether you are on the hunt for a climbing rope or fishing. Size 5/16" 3/8" 8mm 9mm 10mm Fiber Aramid HMPE Kevlar Polyester A simple and basic prusik cord. If you’re using a 1/2-inch (12. The Prusik cord we choose to use was an 8mm 16kN Kordas Accessory Cord. I also read that stiffer ropes don't work well as prusik cord. MBS Rating (lb) MBS Rating (kN) 3,822 17. With a prusik I can tie doors open to keep them from closing behind me during a search of a building for fire victims. 0% Diameter: 6. Eye and eye prusiks and bulk prusik cord for tying your favorite climbing hitch. Add to Compare. The climbing rope is a factor also in how well the Prusik operates. (6mm cord works fine on thicker ropes but grips less well on thinner ropes). We supply Prusik loop cords in Mammut or Beal climbing cord depending on availability. 8mm Prusik Cord 2–5mm Prusik available by the foot or in spools of 330' (100M). Numerous authorities recommend using an 8mm cord for 1/2″ rope plus a 7mm cord for 7/16″ ropes. Mar 16, 2025 · Rope Size. The main advantages of Prusik Cord are: excellent balance between knotability and grip; superb abrasion resistance; torque free construction of 100% polyamide; smooth surface structure for high user comfort; Our Prusik Cord comes in diameters from 5 mm to 9 mm, each diameter version being available in two reverse light and dark patterns. In my mind a prusik cord is 12" or so of cord specifically for the use of making a klemheist or a prusik hitch, commonly referred to as an autoblock, third hand, friction brake, prusik, and more recently a "hollowblock". This does provide less grip when using thinner ropes, so generally, it is best to opt for a thinner cord. Top quality, great selection and expert advice you can trust. If you use a cord that is too thin, it will tighten easily around the rope and will be difficult to move freely. All else being equal a smaller cord for a friction knot, such as a Prusik, will grip better than a large one. Ensure you measure and pick the right size to stay as safe as possible. 4% @ 600 lbf = 29. Typically, a length of cord between 120 and 160 centimeters will work. com FREE DELIVERY possible on eligible purchases. My only question is which rope to use? I don't want to use any 7mm climbing rope as my prusik. 5m length of 5mm cord. EN564 Sep 14, 2020 · Our Prusik cord strikes the perfect balance between firm and supple. When tying most friction hitches, including all of JRB’s original designs, t he diameter of the cord diameter should be smaller than the rope diameter. 7 Oct 9, 2019 · As a minimum carry two prusik loops created by tying a fisherman’s knot (two stopper knots back to back) in a 1. 2 – 1. Add to Cart. Jun 2, 2025 · Use the right size cord: The Prusik cord should be the appropriate size for the rope used. The ideal prusik cord size for 1/2" Life Safety Rescue Rope. The document has moved here. Cord is sold by the foot. Dec 3, 2024 · Best Practices for Using Prusik Knots. Smaller diameter Prusik Loops will grip better but too small will be too hard to move. Spool length: 300 ft. 9mm Prusik Cord. NB Prusik loops are not suitable for self-belaying. Length: Prusik cords are available in different lengths. Apr 14, 2023 · Making Your Own Prusik with Cord. Oct 15, 2013 · Once the catch has been made, all the rope behind the prusiks is slack rope. Product Description. By flexible cord I mean you can bend in half easily when pressed between your thumb and fore (index) finger. 2 and 1. Keep the Prusik cord clean: Dirt and debris can affect the grip of the Prusik cord, so it should be kept clean and dry. Nov 5, 2024 · The tensile strength of Prusik cords varies by manufacturer and diameter but generally ranges from 6. Ideally, it should be 1/16 inch (2 mm) smaller than the larger rope. , a 6mm Prusik cord for a 10-12mm rope). Diameter: 7. 5mm 100% nylon, secure stitch sewn prusik & purcell cord for the rope rescue Aztek Pro Series System. Mar 14, 2004 · The more wraps, the more friction and reliability of hold. There are a variety of sewn prusik cords on the market from different manufacturers but I’m going to focus this review on my favorite: the 5. You can make a prusik loop with a 5 or 6-mm diameter nylon cord. Because of our ability to manufacture a flexible cord that is both strong and highly resistant to abrasion, only one style of small diameter cord is produced. Buy BeneLabel Poseidon Series Sewn Prusik Loops Ropes, Safety, 19", Diameter 2/5", 2 Pack, Blue: Rope - Amazon. 5m of rope. The Prusik Knot is one of 23 essential rope knots included on the waterproof Pro-Knot Outdoor Knot Cards - click to see. I read somewhere that the prusik rope should be about 70% of the climbing rope, which is about 7 - 8mm for me. We have engineered the prusik cord so that the rope has enough give to grip the rope, but not be so mushy that the knot locks up. However, I have some concerns about the strength of 4mm cord and its range of applications. The Do you want the knot to hold in both directions, release easily, bite very quickly? In addition to which knot you pick these factors will determine if you want to use a thinner diameter prusik cord like an 8mm eye to eye or something thicker like a 10mm prusik loop, or even how long of a prusik to start with. Find Aztek Bound Loop Prusiks & Purcells at CMC. 8mm Prusik Cord It is generally recommended that the diameter of your prusik cord be 70% of the rope diameter, and no less than 50%. A Purcell Prusik is a related cord popular among cavers and rope-rescue people. Prusik Cord Diameter Guidelines. The general rule of thumb is the diameter of your Prusik cord should be between 60% to 80% of the diameter of the main rope (approximately two-thirds). Diameter: The diameter of the Prusik cord is crucial and should be chosen according to the diameter of the main rope. This size ensures sufficient friction without making the Two color choices allow you to use a separate color for each length Prusik in a Tandem Prusik Belay System. However, I would be inclined to give the stick method Koa describes above a try rather than having to keep track of all those different sizes of cordage to Our larger cords have a very durable sheath and high MBS which makes them great for prusik cords, cordelettes, ice threads, and lightweight low-stretch fixing and hauling "tag" lines, but can also be used in non-life safety applications such as dog leashes, towlines, or even as decorative trim and cover. Moved Permanently. 6–8mm Prusik available by the foot or in spools of 165' (50M). Size. 2 -1. Used during rescues, tandem Prusik belays ensure the Prusik grabs the rope, preventing injury to rescuers’ hands. 8mm cord is best suited for 1/2" rope. Our 7mm sewn cord products are offered in various lengths and take the hassle out of tying knots. Proper Wraps: Increase wraps on the Prusik for smoother ropes or when additional grip is needed. This cord is flexible and grips well onto the 10mm rope. Placement Matters: Our collection of prusik cord has the best prices from popular brands like Teufelberger, Sterling Rope, and everything in between. Yes, thinner cord will lock up easier, and also be harder to unjam. Going off the rule of 60-80% of the rope diameter for prusik diameter I‘m using a 4mm cord for Prusiks on the RAD line. Rope / Cord Specifications Description (Fiber Type), Diameter, Breaking Strength: CMC Prusik Cord and Load Release Hitch Cord (Nylon) 5 mm 7 kN (1,574 lbf) MBS 6 mm 8 kN (1,798 lbf) MBS 7 mm 8 kN (1,798 lbf) MBS 8 mm 16 kN (3,597 lbf) MBS 9 mm 16 kN (3,597 lbf) MBS What size cord should you use for a Prusik? Ans: In safety applications, for example, rescue and belays, numerous authorities commend using two tandem triple plastic wrap Prusik hitches. 100% Satisfaction Guarantee Apr 22, 2024 · Buy SEAMUS 4mm Prusik Accessory Cord 15M (50ft) Rock Climbing Rope High Tensile Strength Rock Climbing Accessories Cord Double Braid Nylon Cord for Mountain Tree Climbing, Canyoneering,Fire Rescue: Utility Cord - Amazon. Our sewn cord products have become very popular as they eliminate bulky knots without compromising strength. View as Grid List. There are exceptions to this based upon the hitch that is tied, weight of the climber and the construction of the rope and hitchcord. g. Though different factors govern the length of the cord including its diameter and the height of the person using it, you can use 1. Related products Having said that, many mountain guides recommend 6mm cord for prusiks as it slides more smoothly on 11mm ropes and allows a greater safety margin. The diameter of your cord should be 60% to 80% of the rope’s diameter, whether you are using the prusik on one rope or two. 0 kN for 7-10mm cords. A great prusik cord sized for rope greater than 1/2" diameter. I can Shop for Prusik Cord at REI - Browse our extensive selection of trusted outdoor brands and high-quality recreation gear. 1/2 Inch 4 items; Standard 8 items; 1/8 Inch May 31, 2025 · What Size Prusik Loop Should You Use for Rappelling? If you’re using a prusik on a single rope or double, the cord’s diameter must be 60 to 80 percent of the entire rope diameter. $0. 100% nylon. The Prusik Loop should always be between 50-80% diameter of the rope that it’s attached to. The ideal cord for prusik knots applied in canyoneering, climbing, rescue, or arborist applications Prusik Cord strikes the perfect balance between firm and supple. 8 mm prusik cord is available in four Cord:Rope Ratio. Should you choose thinner cords, they will readily constrict around the ropes, making it harder to move freely. 0 6mm Prusik Cord - Yellow with Black Tracer. Breaking strength isn't really a consideration in a scenario where you would be using prusiks, since even 6 mm has a breaking strength of >7 kN, and prusiks are Prusik Cord Thickness. This item is a polyester jacket with a polyester core. I have seen several guidelines, such as use cord no larger than 70% of the diameter of the rope being ascended, but truly this is only a guideline. e. Make a sling of cordage (no more than 1/2 the diameter of main rope). How long should a prusik loop be? I usually carry three loops: 2 short, around 30cm, and one long, around 120cm. Thus one needs another system to unload the stuck Prusik. How to Tie a Prusik Knot. CONTACT US 800-513-7455 Feb 20, 2011 · Generally, prusik knots work best if you use a smaller diameter cord than the rope you're tying to. Application and Uses. Prusik Rope Length. At loads over 1. fall onto it) the prussik will slip to absorb energy, making dynamic cord unnecessary. Note: 2–7mm cords come in assorted colors. The term "Prusik" refers to both the loop of cord and the hitch itself, and the action of using it is referred to as "prusiking. 5 meters. The length of the Prusik cord should be around 1. The difference ratio in the table below is calculated as the cord diameter divided by the rope diameter. Choose the Right Cord: A common rule of thumb is to use a cord with a diameter 60-80% of the host rope’s diameter (e. In Aug 11, 2017 · Sewn Prusik Cord (Beal Jammy): Beal Jammy personal prusik cord. See specs for information on tensile strengths. Jun 19, 2017 · Buy Rope Logic Bee Line 5/16” (8mm) Diameter Eye & Eye Prusik Cord, 30” Length - Black/Brown: Utility Cord - Amazon. Prusik Hitch Knot Tying Instructions. If the cord diameter is too small, the knot/hitch will be too tight to move the loop easily. 5mm skinny ropes, but 5mm or 6mm works well on most normal ½ ropes (8-8. This results in a smooth, controlled movement over the rope and greatly limits sheath slippage or milking. What diameter hitch cord should be used for your rope diameter? A good guideline is to have a minimum of 2mm difference between the larger rope and smaller hitch cord. It will sometimes lock. Rope / Cord Specifications Description (Fiber Type), Diameter, Breaking Strength: CMC Rescue Prusik Cord and Load Release Hitch Cord (Nylon) 5 mm 5 kN (1,124 lbf) MBS 6 mm 7 kN (1,574 lbf) MBS 7 mm 10 kN (2,248 lbf) MBS 8 mm 12 kN (2,698 lbf) MBS 9 mm 17 kN (3,822 lbf) MBS RescueTECH Prusik is made by New England Rope and is the best quality cord around. This will ensure proper grip. Size selection should be based upon diameter of main line. What can I use for Prusik? Sep 6, 2021 · The relationship between the Prusik cord size and the diameter of the standing line/climbing rope determines the holding power of the knot. Drop a PMP into the system on the slack rope, attach it to the anchor and then turn it into a z-rig with another pulley and short prusik cord. Excellent for use in Load The difference in diameter between the main line and your Prusik loop diameter should follow the general rule of a 60-80% ratio. It all depends on conditions: cord stiffness, cord diameter, cord type and moisture conditions. The colors shown in the photo are just examples and are not indicative of what we have in current stock. What do you think the size of these should be. PMI’s sturdy 100% nylon prusik cord in standard colors to help keep your gear organized. Prusik is only for ascent, not descent. The Jammy is basically a sewn cord made with an aramid core and polyamide (nylon) sheath. Made of nylon with a torque-free, kernmantle construction. Diameter. 3/16" 1/4" 9/32" 5/16 Tips: Prusik loops should be made of a cord that about 60-80% the diameter of your climbing rope. In general, a 6mm cord works best with the 10mm rope and a 5mm cord works best with the 8mm rope. The most affordable way to incorporate a prusik knot into your climbing equipment is to make your own with an accessory cord. A stiff and slick cord will have much less purchase than a limp and rough Mar 11, 2025 · Prusik Cord Size. 3% @ 1000 lbf = 40. There are many options that will work well for items like prusik hitches and a double fisherman's knot. Generally a 4mm prusik is best on 7. 5mm dynamic rope. These use-specific cords have a firm, yet supple hand and will hold higher loads before slippage than traditional accessory cords. In theory, if you load it heavily (i. Softer cords are better because they cinch 2–5mm Prusik available by the foot or in spools of 330' (100M). The ideal ratio varies with the hitch, rope, cord and its stiffness. com FREE DELIVERY possible on eligible purchases New England prusik cord has the right balance of suppleness for reliable activation and strength for long service life. A somewhat longer loop than the normal Prusik is used around the rope, then a second Prusik is used around the cord loop itself to form a foot loop. Scroll down to see the Animated Prusik Knot. Call 1706-764-1437 to inquire about this items Instruction Sheet. . For the Prusik knot to grip, the Prusik loop must have a smaller diameter than the rope. 0 to 7. A Prusik-Minding-Pulley is common in rope rescue. We recommend you practice your prusik application prior to actual field use - all prusik or accessory cords are not compatible with all mainline or belay rope. To make a prusik loop, you generally need between 1. 2 to 1. 5mm Dynamic Prusik Cord Available in: 60M Lengths in Brown or Blue Elongation: @ 300 lbf = 19. Mar 8, 2023 · Prusik Cord. If you use a cord that is too thick, it won’t have enough friction to lock up when you need it to. That means, in theory at least, a 12mm diameter climbing line should have a 10mm friction cord and an 11mm climbing line a 8mm friction cord. Tandem Prusik Belay. Sep 1, 2010 · As you said, dynamic cord in that diameter is really difficult to find and the static will work fine for this application. 5 m length of a 5 mm cord on most of the thicker varieties of ro I was trying to find that perfect length for 3rd hand backup prusik cord, but I found that they should be smaller than my other prusiks. Aug 7, 2014 · Cord diameter. A too-small or too-big cord may not grip the rope properly. Example: for a 9mm main rope, a 6mm Prusik cord is enough. tydp gwgvbp dmsjg fgka xtgfk nxiyw vvzdqy nysac wil wodjri