[AT] Chain saw cutting issues

Indiana Robinson robinson46176 at gmail.com
Wed Jan 21 21:13:51 PST 2015


As Big-dog says it is most likely the bar instead of the chain. If you have
a new chain in an older bar your drive teeth on your chain may be riding on
the bottom of the bar groove. Make sure that the chain is only riding on
the edge of the bar rails. It is possible to mill the bottom of the bar
deeper but it is not worth it unless you already have the tools on hand.
Standard short bars are cheap. Check the bar rails all around with a good
small square. They both must be the same height. Unless you have something
like one of those silly banana bars you should make a habit of flipping
your bar over each time you have it off so that the rails and the contact
points on the chain will wear evenly. It is also sometimes necessary to
slightly tighten the width of the bar channel as it can wear too wide to
guide well.
I seriously doubt that your problem is the chain teeth unless something
serious has happened to them. Chain sharpening is normally pretty forgiving
as long as you get the basics. Bar fit on the other hand...
I have professionally sharpened thousands of chainsaw chains for over 40
years. I really always preferred to get the bar and chain both so I could
check them for fit together. There is a lot more to a chainsaw than teeth
and a motor.  :-)



On Wed, Jan 21, 2015 at 11:14 PM, Vaughn Miller <vemiller at gmail.com> wrote:

> Almost certainly an improperly sharpened chain.  The cutters on each side
> should be equal length.  I keep a dial caliper handy when sharpening chains
> to check my work.
>
> Vaughn
>
>
> > On Jan 21, 2015, at 9:57 PM, David Trompower <flywelder at live.com> wrote:
> >
> > I have a [U]Poulan  18 inch classic, chain saw.   [/U]    and had it for
> years.
> > Today though, I have issues with the chain blade.
> >
> > the chain is but 2 months old.  it now will only cut the soft outer wood
> of a log and stops when it reaches the hard wood of the center of a log. It
> is nut cutting straight through a log.  Instead, it is cutting in such a
> way, that by the time the blade reaches the hard wood...  my left hand is
> in the air and my right ( which is operating the throttle)  is down, and
> the blade has cut a curve? a curve that  heads in the direction of my left
> leg.
> > SO I sharpened the blade teeth and filed down the  blade depth gauge
> just a bit...( using a Oregon,sharpening device to do so).
> >
> > [U]I am [/U]getting short chips  off the blade but the saw shows no
> improvement in cutting abilities and continues to  cut a curve . ???
> >
> > I have resharpened  and resharpened and even sharpened only the left
> cutters,  No improvement.
> > then only the right cutters, and no improvement?
> > maybe I need to sharpen yet some more the teeth on one side more than
> the other?,.... but which...the left cutters or the right?
> >
> > And it seems that once the blade reaches the hard center wood of a log,
> the only way I can get and  more shavings is to rock the saw  ( tilt it
> left and right in a rhythm,)  but it cuts a deeper groove towards my left
> leg.
> >
> > Tell me what is causing this curved cut issue ? and how do I correct it?
> > and why the cutting stops when I reach the hard wood in the center of a
> log?
> >
> > R. David
> >
> >
> >
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-- 
-- 

Francis Robinson
aka "farmer"
Central Indiana USA
robinson46176 at gmail.com



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