My son is about to go camping, and wished for snatch blocks to hoist bear bags into trees more easily. I suggested that we had the stuff around the house to manufacture this ourselves, and make it much lighter (useful for camping) than the expensive high-load snatch blocks available for sale. 1" p…

Second set went way better and faster. Figured out how to bend the strap better, so it’s more even, and left more meat around the bushing for strength. This time I remembered to chamfer all the hard edges on the pulley. [image] The slight outward bend at the loose end of the strap means that when…

Got a report: The snatch blocks worked well. :tada:

I got a request that the open hole should be ½" like the bushing hole on the next revision. Also, the square corners offend my sensibilities, so rounding the corners… I’m having some trouble getting fasteners to show up in the right place in my assembly because I’m still learning the Assembly4 work…

Figured out how to add the hardware correctly. [image] I’m not done making drawings, but I think the model is at the point that someone else could reasonably benefit from it, so here it is: [image] Michael K Johnson / SnatchBlock · GitLab Lightweight snatch block design derived from …

My son and I wondered about strength. The ends around the holes of the strap are clearly the weak points. I realized that a ½" hole in ¾" strap was a total of ¼" cross section across the face of the straps, and two ⅛" straps back to back is also ¼" cross section through the straps, so I should be a…

I think you are good with you estimates :smile: In my backpacking experience we just used a bear bag to put all the food in and hoist just that up. Of course I’ve seen a bear go for a scented stick of deodorant before as well :man_shrugging: It’s also all well and good until the bears figure out t…

Yeah, in Pisgah where I occasionally go camping, hoisting a bear bag is no longer allowed; the bears have gotten educated. Only bear canisters allowed, which is why I have two. I’ve also experienced a bear taking down a well-hung pack and eating the food out of it. That was interesting. And slightl…

A couple of other points to consider. First of all aluminum can be hardened. And there are various finishes that can be applied to it that may add a small amount of additional durability. The second is that you can add to your punch outs say an insert of brass or some blend of steel alloy. Since I …

And a follow-up at it there was a bunch of stuff I literally did not see this morning when I started reading this post and as I’m now reading it for the second time I’m observing a whole bunch of new information such as some actual pictures of attempts at constructing this manually. So I have a much…

[image] RFLULLING: First of all aluminum can be hardened. Yeah. Work-hardening aluminum making it weaker is one of my concerns regarding safe working load. But I think there’s enough margin to hoist a pack or three. [image] RFLULLING: The second is that you can add to your punch outs say…

Freehand snatch block

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mcdanlj (Michael K Johnson) August 21, 2022, 10:43pm 16

No longer freehand! Here’s the update.