Rate My Hinge.

[Mark Bolam]

Both fails.

 

No naked females in shot.

 

Rule change 412.12 paragraph a13

 

Sorry fellas.

[Frankie Lawrence]

Looks good! Better would be if felling cut is level or slightly lower than bottom of gob or else you might end up with a step cut...

 

I thought it should be ever so slightly higher:confused1:

[Neil Frost]

Thanks for advice all. Will photoshop a naked lady in ASAP!

[Xerxses]

I thought it should be ever so slightly higher:confused1:

 

Sorry if I confused things... If you are felling trees for logs (no waist high arbstumps) you tend to go really low on the trunk where the fibres often (at least on fir trees) arent straight. Cutting low backcut in these circumstanses ensures that there is enough holdingwood left in your hinge as the grains grows at an angle to your gob and cutting high sometimes means that you only have half of your hinge with intact fibres. This is probably not the case in the photo...so in conclusion; get youre backcut level with your felling cut and you are always correct!

 

I have been in this trade for a long time but due to a change in company policies I did my swedish eqvivalent to my 30 and 31 units last week. Great to get a freshening up on things!

[Big-Al]

Cheers for the advise Xerxses:sneaky2: I'm not a full time arborist(mostly just tree work when needed at the gardens/estate through the winter) so any advise on my felling is appreciated.

[felixthelogchopper]

Cheers for the advise Xerxses:sneaky2: I'm not a full time arborist(mostly just tree work when needed at the gardens/estate through the winter) so any advise on my felling is appreciated.

 

Might just be my eyes but it looks like your back-cut curves upward a bit. Are the teeth on both sides of the chain even?

[testcricket01]

a few from couple months ago

[Xerxses]

a few from couple months ago

 

First one is perfect!

 

What happened with the third one? It looks like it broke early end fell towards your foot in the pic? Some pulled fibres in the top of the hinge and compression in the bottom of the pic?

 

Was it a sideleaner?

 

If it was, did you bore and put a wedge just behind the hinge on the compression side?

The ratio is usually 1:3 in strength between compressed and pulled fibrestrength. Eg fir has a pulling strength of about 600kg but only 200 in compression. Just a thought and wanting to share if you didnt know this. (Yes newly aquired knowledge.... Always done it but never knew the theory behind...)

[Matt Butler]

felling cut is level or slightly lower than bottom of gob

 

Never heard that felling cut should be lower than gob cut, whats the theory behind that?

[testcricket01]

First one is perfect!

 

What happened with the third one? It looks like it broke early end fell towards your foot in the pic? Some pulled fibres in the top of the hinge and compression in the bottom of the pic?

 

Was it a sideleaner?

 

If it was, did you bore and put a wedge just behind the hinge on the compression side?

The ratio is usually 1:3 in strength between compressed and pulled fibrestrength. Eg fir has a pulling strength of about 600kg but only 200 in compression. Just a thought and wanting to share if you didnt know this. (Yes newly aquired knowledge.... Always done it but never knew the theory behind...)

 

3rd one was a horrible willow straight fell on a building site with a big pile of rubbish infront of it. i bored in got the level hinge and came out the back stuck wedge in and away it went. wasnt a side leaner theory behind things you've lost me im affraid got a different pic of it if it helps though.