Chain Sharpening.. Acceptable discrepancy between teeth.

[treequip]

Seriously? Well, you know what they say. Those who can, do. Those who can't..teach

 

They also say, if you can read this thank a teacher:001_rolleyes:

[Logjam]

I can't comment on the assessor/trainer but the fact is that there is no actual tolerance set down by city and guilds . Did the saw cut ? Was the saw displaying any unacceptable levels of vibration ? As long as the saw produces saw dust / chip then it is classed as sharp .

 

Assessment requirement is for the chain to be sharpened to manufacturer recommendations - this will state cutters of equal, identical, or same length depending on where you look. Any variance from this is down to individual assessor/ trainer discretion. Could depend on the chain pitch & wear, 1mm difference on a new chain might be an error of around 10% but on a well worn chain could be more than 20% (both excessive IMO). This doesn't just affect kick back but vibration & cutting performance.

 

CC - don't think you're OTT, 0-0.5mm variance sounds a lot better than 1-1.5mm.

[doobin]

Nope it's called starting somewhere , bearing in mind candidates have seen less than 40 actual hours on a saw ( including maintenance ) which I'm sure you will agree is not an overly huge amount of time to become proficient in all aspects let alone a pro when it comes to sharpening . Would you not agree ?

 

If its putting dust instead of even small chips out the back it's not sharp, not even close. How the hell can you pass that? They'd take so long to make a felling cut that it'd run out of fuel, then you'd have to fail them!

[combined tree services]

Sorry I don't agree

 

Nowhere does it state a tolerance nor does it state identical

 

 

Filing the chain

 

http://www.stihllibrary.com/pdf/SharpAdvice061301final.pdf

[Logjam]

CTS - from the Husqvarna sharpening link in your post "It is important that all the cutting teeth are of equal length".

[combined tree services]

As far as I am aware equal does not mean identical , the tolerance for sharpening a chainsaw chain is greater than one would expect , if the tolerances were so small and detramental then I think you would find the sharpening system would be somewhat more technical and I would expect to see printed tolerances . But all of this is accedemmic in relation to industry standards and beginner experience . I would be extatic if every candidate that I assessed could get every tooth within 0.50 mm but it is just not realistic

[stuartc44]

What does equal mean then?

[Python]

equal

ˈiːkw(ə)l/

adjective

1.

being the same in quantity, size, degree, or value.

"add equal amounts of water and flour"

synonyms:identical, uniform

 

 

 

http://www.forestflooronline.co.uk/

[peatff]

equal

ˈiːkw(ə)l/

adjective

1.

being the same in quantity, size, degree, or value.

"add equal amounts of water and flour"

synonyms:identical, uniform

 

How do you add a pint of flour ? My brother in law was happily using a saw which was producing nothing but smoke from the cut, he is a bit lax on maintenance though. He couldn't believe the difference when the saw was sharp and though it was something to do with the wood being softer.

[doobin]

How do you add a pint of flour ?

 

You measure flour in a pint jug, simples.

 

Volume isn't just for liquids- I mean, we sell logs by it, don't we?