Bar wear

[Ty Korrigan]

46 minutes ago, The avantgardener said:

If your rails are splayed you are running your chains too tight, your never going to compress the rails back evenly without some pinch point causing excessive heat, I have never even heard of a tool that compresses the rails back in.

The rails are not splayed.

I am assuming the groove has widened increasing chain rock.

I'm a bit lost, this is a very recent phenomemon with my 60cm+ bars and the only common factor is the choice of oil.

It seems to come on fast too.

I put the 500i away and the next job it jams, maddening.

The bar simply jamming in the cut, refusing to advance.

 First I thought old chains new bar.

Then it occured with new chains.

 Stuart

 

 

[The avantgardener]

6 minutes ago, Ty Korrigan said:

am assuming the groove has widened increasing chain rock.

If the groove has widened the chain will rock from side to side and not cut a kerf wide enough for the bar to fit through and will cause it to jam. I am surprised this has happened so quickly on bars that aren’t used all the time, especially as they are good quality.
The oil stone is a good tip, worth a try before switching to mineral oil.

 Maybe it is the Aspen oil not being up to the job, I’ve used aspen fuel for years but not the oil, I think I might give it a miss.

[Ty Korrigan]

Old bar rail closing tool from Oregon.

Stuart

 

 

[openspaceman]

21 minutes ago, Ty Korrigan said:

Old bar rail closing tool from Oregon.

Stuart

 

 

I remember those, never used one though, just replaced bar when it got that worn.

[The avantgardener]

7 hours ago, Ty Korrigan said:

Old bar rail closing tool from Oregon.

Stuart

 

 

I am a little confused, you are trying to close the rails but state that they aren’t splayed, what are you closing then?

[peatff]

12 hours ago, The avantgardener said:

If the groove has widened the chain will rock from side to side and not cut a kerf wide enough for the bar to fit through and will cause it to jam.

 

Wouldn't that cause it to cut a wider kerf ? It would cause it to cut round corners like having one set of cutters sharper.

[billpierce]

 

Wouldn't that cause it to cut a wider kerf ? It would cause it to cut round corners like having one set of cutters sharper.

No. The chain pushes to one side and the bar doesnt follow it properly and sort of wedges/grips a ledge made in the cut. Its very annoying using saws with worn bars. And yes, it wont cut straight either

[Stubby]

1 hour ago, peatff said:

 

Wouldn't that cause it to cut a wider kerf ? It would cause it to cut round corners like having one set of cutters sharper.

It only rocks from side to side if you push it with your finger in fresh air . The reality is it picks a side for what ever reason and stays there causing it to do what bill has described .

Edited June 10, 2020 by Stubby

[openspaceman]

37 minutes ago, Stubby said:

The reality is it picks a side for what ever reason and stays there

...and the whatever reason is most likely one side cutter is less well sharpened than the other.

 

A worn bar when well dressed to remove any burrs will cut surprisingly well if the chain is good, it shows up on awkward and horizontal cuts but can cross cut well after it's useless for felling.

[Aspen@AAOIL]

Have you checked that you are getting enough oil onto the chain? a simple test by running the chain above a piece of paper should be enough to signal if you have any problems with the oil feeding system on your machine. Having the oil feed set to max and not getting sufficient lubrication could signal that there is a problem.

 

We have not had any complaints from any customers in the UK running Aspen bio chain oil in the past