[TheForge] Re: Chop Saw Irritation

Mon Jan 28 17:51:08 2002

I agree with some of the other replies, Ive seen the same thing and I felt
it was that the blade had come in contact with too large an area to cut
properly and rotating the piece a little fixed the problem, doesnt matter
whats in the A36 mix in my opinion, Ive cut all sorts of carbon steels on
the saw and they all seem to cut about the same. One other gripe I have is
that my saw never seemed to cut a 90 deg cut (top to bottom that is). Most
of the time it doesnt matter but especially on say square tubing you want a
square edge to but the pieces up together for welding, mines a makita saw I
wonder if any of them are better than mine at 90 deg cuts. I guess I could
reengineer the hinge but I never looked at it and it should be straight when
made if you ask me.

> I have the same problem.  At first I thought it was a hard spot in the
steel
> but I notice that regardless of the material, it only happens on thick
stock
> (about 1" dia") and always in about the same place.  It can happen on thin
> stock too if I am trying to cut it on the flat.   Then I tried cooling the
> cut with water which made no difference.  Anyway, I have used these blades
> to chop red hot metal with no problem.  Then I tried several different
> blades - also not much difference.
>
> Now I am convinced its a chip clearing problem and that when the cutting
> path in the steel gets too wide, the blade cant clear the cut material.
In
> fact I suspect that the absence of sparks is the *cause* not a symptom of
> the problem.  In any case, loosening the clamp and rotating the work a bit
> seems to solve the problem.
>
> Adam
>
> RW writes:
>
> > Has anyone noticed that while cutting through a piece of mild steel,
> > especially hot-finished, that the sparks are abundant and the wheel
seems to
> > be moving right through the piece, then suddenly, the sparks diminish to
a
> > small stream and it seems that one has encountered a "hard spot".
Sometimes
> > extra pressure seems to get the wheel through this spot but sometimes
> > nothing helps and the wheel just stays there not moving.  The
Instructions
> > say, let the wheel do the work.  Do not bear down on the metal.  But
> > frequently that does not work.  What is going on here?  What can be done
to
> > resume a nice straight and easy cut?
> > RW
> >
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