Step 3: Construct the jaws

The stilsons were 24" long, I cut the handle into 3 pieces, the short end to the right will become the jaw closing lever pivot, middle section will be discarded.
The rectangular tube section is the cross piece that everything will mount from.

I drilled and tapped the end of the handle to allow for an M12 stud to hold the pieces together and tack welded the pivot in place.

A slot was milled into the rectangular tube and a hole drilled in the back.

A trial assembly is shown In the 4th picture which also shows the pivots for the bottom of the lever socket.
You Archimedes you. Nicely done.
It'd be nice to see the thing in action.....and to see how big a small tree it can handle. I am not sure it is sufficiently broken down, step by step, to constitute an instructable, though.
this is awesome,, great job coming up with the idea. Simple, effective and totally usfull. EXCELLENT
Nice project. <br>Our yard is a popular spot for buckthorn trees and misplaced oak trees. <br>I have a similar project in mind but am still looking for the critical piece (hiding in a box): a large Jumar ascender. Used in mountain climbing, the one I have is on the obsolete side; maybe twenty years old. Very strong and beefy. The end result would be the same as yours except the gripping action would be vertical along the trunk.
This idea is taken from the Weed Wrench. <br> <br>It would be nicer to state that this is a DIY version of another inventors invention.
TBH I didn't know it was, I thought I had adapted a victorian design I saw used at a local wood fair a couple of years ago..... <br>I did see the weed wrench when I was looking online at prices but the idea for the design was already fixed in my mind by then. <br>You have made the link now so good luck with your product, I will not be going into production with mine :)
Been looking for good plans for this type of device. Careful, that's poison ivy under the holly!
Clever design!
What a neat idea! Great job!!

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Bio: Woodsman and field tutor on a week day. Life long inventor, designer, engineer for the rest of the time. From items that make life easier ... More »
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