Bought the garden swing bench years ago—mostly solid, but the chain-on-shackle hinge is weak. Started squeaking, then the chain grooved the shackle. Now it jumps the groove on big swings, making a loud crack. Some swings use nylon spacers; I want bearings instead to make it last. Original shackle’s hard to replace, so I’d sleeve a bearing to fit inside it. Bearings handle static/dynamic loads; bolt is M10.Thoughts on this fix?
Here is the cross section.
seems like there are lots of moving parts. less is more. i would try changing the link in contact with the shackle maybe something bigger so it goes over the groove possibly file down the shackle if nothing changes; you sure the problem is the shackle and not the chain? between the two the chain is likely something a profit optimizer would cheap out on.might change materials or geometry. brass is self lubricating and it looks like the brass has rubbed off that steel shackle might just need to electroplate and be done.the groove is made from a round object rubbing on a round object, hmmm; add some graphite to reduce friction, latex paint could fill in the gaps or at least show you were the unusual spots are as it is rubbed off.
that groove might be intentional, the skipping could be the chain ridding up the groove from poor lubrication, that wear is the removal of lubrication. electroplate it don't rebuild the wheel.
>>2956136>you sure the problem is the shackle and not the chainYes, when I remove the chain there is a groove in the shackle. That groove wasnt there when we bought it. >seems like there are lots of moving partsNot really, screw will be threaded to bottom shackle with extra nut outside to secure it so it will became one part.Bearing sleeve will be solid in upper shackle. Only thing that will be moving is bearing.
Looks like a proper overkill solution, if you have the heart and time, just go for it. I bet it will work great, unless the bearing rusts.
You will need a bearing winh an inner race though, and it will gett pretty damn small. Id go for a regular ball bearing instead, and see if i could get one that fits inside the upper hanger without a bushing. It will be easier to make an inside bushing to make the lower shackle fit, where your choice of shackles, and thus shackle bolt sizes will be more limited.Ofc the bearing needs to be as thick as the upper shackle is wide, unless you shim it.
You caught me at the right tine, i had a notepad on the coffee table... I like to keep things simple, and something like this would just be bolts and washers. I see that my sketch might make the chains rub on the hanger tho, ill give it some more thought
This perhaps? The nylon washers would only see minimal load, as the brunt of it goes into the bearing.Shackle sizes are limited, esp as you need one that fits trough your chain, so the bolt might have to be one not made for the shackle. When i think about it, the od of the bearing really doesnt have to fit into the hanger either.Fun problem. Your original solition seems good too if you dont mind a bit of manufacturing and special bearings
>>2956148>Id go for a regular ball bearing insteadBall bearings that will fit doesnt have enough static load rating. I believe it was something like 100kgs x2 bearings. However 3 adults can and often do sit on this swing so I need atleast 300kgs + some safety factor for static load. Ball bearings that can do this are way bigger than I can fit. >>2956150Both of your sketches are exacly like my first and second idea and I almost bought everything both times lol. There is a ball bearing that fits into the upper shackle just like in your drawing. However, I need to use needle bearing as they have much higher load capacity, see my reply above. They obviously come in specific sizes so I need to make sleeve for it which I can in my work.
>>2956155oh right, perhaps a cylindrical roller bearing then
>>2956132>garden swing >roller bearing >10 piece rube goldberg shackle wtf? its a garden swing. mine hangs on 2 ropes and has four 15 years. why overcomplicate shit?
>>2956239You clearly dont have the tism so plz get out
>>2956239Impressive, very nice. My garden swing can hold 3 adults and can be unfolded from bench into bed.>pic rel
>>2956329Sketch guy here. I know from own experience that if a project gets too complicated it just might never get done.An alternative might be to buy two rope-pulleys for climbing, and slip them inside the hangers and attach the chains to them. They cost money, but so does bearings and shackles i guess. And that hammock looks pretty nice so it might just be worth it.The cheaper petzl ones i looked at hasnt got bearings, but oillite bronze bushings.
>>2956329>rope would be limp dick pussy shitlollmfao even https://www.samsonrope.com/mooring/amsteel--blue
>>2956332>ameritards are so fat that they need anchor-grade chains and kevlar cables to hold their weight
>>2956330>I know from own experience that if a project gets too complicated it just might never get done.Its not really complicated. I designed it based on stuff I can buy. Only bearing sleeve must be custom made but I can ask guy in my job to make it on lathe.
>>2956338Hey man just trying to give you a hand but sure okedokee
>>2956340I appreciate it every feedback in this thread. Im just saying I can buy 5 of 6 parts required for this...
>>2956132A properly greased bearing has some resistance it is not magic. I don't believe that two chains on a shackle would overcome that resistance rather than riding the shackle and moving the same problem taking you back where you started.The triangle scribed by the two chains should come to a point at the bearing axis, not below it.Chains on the bearing bolt is an improvement, perhaps some metal plate which holds the chains apart (such that they form a triangle at the axis of rotation) and is bolted through the axis of rotation. One ever side of the bearing.
>>2956329>My garden swing can hold 3 adults and can be unfolded from bench into bed.I guess that makes you a real swinger...
>>2956358>The triangle scribed by the two chains should come to a point at the bearing axis, not below it.If I attach chain directly into axis of bearing, I will get twisting forces.
What is the ID of the shackle on your swing? I'm guessing 1.5" since its likely 2x material as the support?
>>2956698One attached to swing is around 7,5mm in diameter. One attached to bearing is 10mm
>>2956895Nah man, I meant what is the inner dimension between the legs of the shackle where the red line is on pic rel. I know when I typed it up it sounded weird, I just didn't know any other way to phrase it.
>>295690824mm
>>2957154Did you do anything yet or are you just going to talk about it?
>>2957154com8 plain spherical bearing. Might have to use a die grinder to open up your shackle a tiny bit, or might just be able to hammer/squeeze it into place. Weld the outer race into your shackle with a couple small stitch welds per side. Would have a lot higher load capacity than a standard roller bearing and a 1/2" bore for a larger bolt or shackle. https://www.ebay.com/itm/385317766617
>>2956358>The triangle scribed by the two chains should come to a point at the bearing axis, not below it.This
>>2957159Op is just going to talk about this and we will never see results. /Dibuy/
>>2956908This is how I'd do it. Just make some thingamajig to attach it. Then you can slide the shackle bolt trough it. Look, it's lubricated
>>2959677Easily the strongest option.
HOWS IT GOING YOU FUCKING FAGGOT DID YOU BUY TVE 6 PARTS ANDHAVE THE GUY AT WORK MAKE THE SEVENTH OR ARE YOU JUST JERKING OFF ALL DAY
Sorry guys I kinda little forgor about this since we are not using the swing in winter months (its 1°C outside right now, crikey!). Also Im on the edge of quitting my job so giving the guy my project and then just leave would be pointless but sure hilarious.
