Eye bolts have a shank for anchoring to structures or equipment and a ring for attaching rope, hooks, or other hardware. Eye-bolts do pose some threat to tree safety but far less than “choking” it with straps does. They're used as anchor eye bolts for routing or tying down wire and cable. Permanent Eye Bolts for Hammocks? I finally got around to trying a hammock. Decided to check McMaster-Carr. the upshot is- the less slack in your hammock, the more horizontal force you are putting on each eye bolt- at a 30 degree angle from the horizontal, you're actually putting about 165 lbs of force on each eyebolt. 1" diameter by 12" long Eyebolt. ie Bacteria from the bolts. 1/2 in. You already know that the blood layer, the cambium, is directly under the tree bark so you might think that this would be a problem but it really isn’t. I have seen bolts through many years of service and nothing with the installation has ever cause the tree to fail. Muzata 316 Stainless Steel Eye Shape Screws, Heavy Duty Screw Eyes for Metal Hook, Wood Terminal Ring Eyelet Hooks, Hammock Stand, Self Tapping Screws, 3.5 Inches M6 Eye Bolt … This will aid uniform weight distribution and also prevent the chains from rubbing against the swing when in motion. The eye bolts, screws eyes, or hooks should be installed 2 to 4 inches wider than your swing’s length. When you install an eye hook you are essentially drilling a hole into the tree. Go right a head if it is your trees. I wanted the removable eye bolts, so, went searching. For instance, for a 50-inch swing, space the hangers 52 to 54 inches apart. x 8 in. If this is your first visit, be sure to check out the FAQ by clicking the link above. According to the hammock calculator I need to install eye bolts 11.3 feet high. ZUSFUL 12-Pack 304 Stainless Steel Screw Eyes, Heavy Duty Screw in Eye Hooks Ring for Hammock Stand, Yoga & Brazilian Hammocks, Swing Chair, Indoor & Outdoor, Self Tapping Screws, 3.2 Inches Eye Bolt 4.7 out of 5 stars 109 Zinc-Plated Eye Bolt with Nut This eye bolt boasts a formed circular eye This eye bolt boasts a formed circular eye at the non-threaded end and a blunt machine screw thread on the other end. Another place I found with the part as described was Eastern Marine, where it would also have been $28 delivered. These Stainless Steel Eye Bolts are useful for attaching tree swings to branches, building hammocks or other related tree house projects. As an arborist we do this all the time to strengthen the tree with bad form. The 12" does not include the eye, but leave enough space to get the nut/washer on and I like to see 1/2" or so sticking out because you can tell visually from a distance that the nut is not just barely holding on. To start viewing messages, select the forum that you … You may have to register before you can post: click the register link above to proceed. The trees will be able to recover from the bolts installation. Lift eye bolts are rated for vertical lifting up to their specified capacity. From Princess Auto, a single bolt plus shipping would have been $28. at tighter angles, you can easily put up to 10 times your bodyweight of force on each eyebolt! Eye bolts cause minimal short term damage and the tree will continue to grow unaffected. Great for light-duty applications, it is made with steel for strength and is … There is a small chance that a guy with a chainsaw could hit them many years down the road. We do this all the time to strengthen the tree register before you can easily up... To their specified capacity Marine, where it would also have been $ 28 for routing tying! Against the swing when in motion specified capacity i need to install eye bolts, screws eyes, hooks. 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