Heavy reduction

[Mick Dempsey]

Dunno, all my qualifications were done in the UK 24 years ago.

 

Don’t know what any of these letters/numbers mean anymore.

Edited October 31, 2018 by Mick Dempsey

[AA Teccie (Paul)]

Yep, CS32 & CS33 as was, now felling trees of 380mm dia. and above (and over 750mm dia.)

[spuddog0507]

5 hours ago, peds said:

Hi, 

Question from an FNG here, I’ve seen this on a few stumps whilst walking around my local forest, and I was about to take some pictures and start a new thread to ask about it, but your photo illustrates it perfectly. I see you’ve cut out the center of the hinge (with a bore cut from inside the gob?), can I ask what that cut is called and what kind of situation you’d use it in? 

 

Many thanks for any knowledge you can share.

i will put you right on this one, some answers are nearly there but not quite , the cut in the centre of the hinge is called a heart cut and i cant believe no one has said that, the whole idea of the cut is it allows you to fell large trees with smaller saws than needed, tree was just over 4ft across saw used stihl ms461 with 20" bar so tree diameter more than twice the bar length, so take the middle out the tree first and the bore in on one side and then sweep round putting wedges in as you go round ,and it all so allows me to have one side of the hinge bigger than the other side and this would be used in a situation where a tree have a lot more weight on one side ehan the other and i would have a bigger hinge on the side with least weight on to compensate the pull that would be created by the excess weight on oppositt side, dont know if you can zoom in on photo but one side of the hinge is about 3" and the other is about 4.5" hope this explaines it ?,

 

[Mick Dempsey]

6 minutes ago, spuddog0507 said:

i will put you right on this one, some answers are nearly there but not quite , the cut in the centre of the hinge is called a heart cut and i cant believe no one has said that, 

 

Keyhole cut, bore cut, “a rose by any other name would smell as sweet”

[Stubby]

It can also be employed on heavy leaners  that may tend to " barbour " 

[Mick Dempsey]

8 minutes ago, Stubby said:

It can also be employed on heavy leaners  that may tend to " barbour " 

Good point.

Last thing you need is a tree deciding to suddenly leave the wood, go to a local countryside store and buy a waxed cotton jacket.

Nightmare scenario.:)

Edited October 31, 2018 by Mick Dempsey

[Stubby]

Just now, Mick Dempsey said:

Good point.

Last thing you need is a tree deciding to suddenly leave the wood, go to a local countryside store and buy a waxed cotton jacket.

Nightmare scenario.

Bloody auto correct ! ?

[Mark Bolam]

Good craic/explanations fellas, but above it all well done Dog.

That’s a bloody big tree!

Sitka?

[peds]

Cheers dudes, solid knowledge.

[spuddog0507]

12 minutes ago, EdwardC said:

As others have said, boring out the hinge through the gob can be used for a number of things; tree with a diameter more than twice the bar length, leaning trees, and I used it on cricket bat willows to prevent barber's chairing. With the willows and leaning trees I'd cut the gob out, bore the centre and then bore in parallel to the hinge on one side then cut back, but not all the way back. Then bore in on the other side parallel to the hinge and cut back, but not all the way back. This would leave the tree held by an uncut bit at the back which you just cut into and the tree goes over.

 

Back in the day I was clearing dead elm. I had a Husqvarna 2100 with a 36 inch bar. It wasn't unusual  to have to bore the trees due to their size. Felled a few beech that needed this technique as well with the Husqvarna.

yes got some big beech edge trees to fell in febuary and about 6 of them are 5ft+ diameter at the bottom,