Friction system

[12_bravo]

Good morning everyone, Im a rookie arborist here, topped my first tree a few days ago, was in the corp of engineers for a while and did some tree climbing there. im looking to do some design work and machining of tools that may help. Ive designed this tool as a friction system to aid in lowering trees down, or as an anchor point for multiple tie offs, any suggestions or feedback on this?

its for 4x holes that are all 1.5in dia with large radii lead ins, overall its 8" long and 5.5" wide and 1.25" thick, and weighs 2.1lbs

I do alot of my work alone, im not part of a crew or anything, mostly working at home, so If I top a tree I wanted something I could manage lowering it down myself (im sure its super dangerous since I should be focused on not falling out of the tree) but I wanted something to help with the safety aspect.

let me know what you think.

 

[Yarz]

Did you design that from scratch?
I ask because it looks similar to the Notch Triple Thimble or the Safebloc.

Having used neither, (only seen them in a few videos) I'm curious if you had improvements in mind when designing yours vs. those.

 

[MrTreeGuy]

What software you used?

 

[12_bravo]

@Yarz, ive not taken inspiration from either of these, just had the idea in my head. I wanted something that you didnt have to feed the running end through to make it work. which I have since modified to have more of an anchor style to it. ill post pictures later tonight.

@MrTreeGuy I use SolidWorks. Im a Mechanical Engineer in my daily job.

Im also working on a system that keeps longs attached to the tree while doing negative rigging until the log is 180 degrees from its starting point. the hope would be to reduce the amount of energy released into the ropes before the log drops.

 

[MrTreeGuy]

@Yarz, ive not taken inspiration from either of these, just had the idea in my head. I wanted something that you didnt have to feed the running end through to make it work. which I have since modified to have more of an anchor style to it. ill post pictures later tonight.

@MrTreeGuy I use SolidWorks. Im a Mechanical Engineer in my daily job.

Im also working on a system that keeps longs attached to the tree while doing negative rigging until the log is 180 degrees from its starting point. the hope would be to reduce the amount of energy released into the ropes before the log drops.

The x rings/safebloc is one of those products that creates friction to lessen the peak loads on the main anchor point. Before, they used a block and pulley system which places a strong load on the anchor because the friction was mostly at the bottom of the tree.

 

[12_bravo]

This is the update I made to mine.

I also gave machining a rope wrench a try, and it worked out pretty well! im acutally really really pleased with the end result. I just used 2 skate board bearings for the lower bearing, and a machined pin and cotter pin for the upper pin.