Hi I hope someone can help.
I have just received my bi-monthly ration of new blades from regular
outlet (cash deal) but the cut has a serrated edge. This is for both the
1/4" and the 1/2". Previously I have noticed the the same effect on a
1/2" blade but not the 1/4" which usually gave me real smooth cut that
didn't need sanding. I rang and told the outlet the problem and asked if
they had a smaller "offset" angle blade which I thought would fix the
problem. They said they didn't and that was the normal offset on all
their blades but they did offer to refund for the unused blades.
I have only used one 1/4".
Anyway I was wondering if I could lessen the offset by grinding the side
of the teeth of the blade with a stone to make the cut smoother?
Or would it just make more problems.
Any other ideas or what offset should I ask for when I'm sourcing new
blades at a new outlet?
I cut mostly pine or gum tree on the bandsaw.
I believe your problem is caused by one or just a few teeth that are
out of line instead of the set of the blade. Since that tooth or
teeth only come around once per revolution, they cut a wider kerf at
regular intervals. This produces the serrated edge you're talking
about. If the blade had too much set, the kerf would be wide, and the
blade may tend to wander, but the cut would still be fairly smooth.
Looks like a quality control problem instead of a specification
problem. I'll bet if you try another blade with the same set, your
problem will go away.
"There's a difference between doing things right, and doing the right
I'd be looking for one or a few teeth that stick out beyond the others.
Eithering bending them back in line or jointing them with a stone will
likely take care of the problem. I suspect the teeth may have been damaged
in handling at some point rather than there being an inherint defect in the
blades--it seems unreasonble that the machine that sets the teeth would bend
them to different sets.
Thanks guys, the stone fixed the problem but I have kept one of the
original cuts to show dealer but I suspect the Genuine German bandsaw
roll was made in China like just about eveything else here in Australia.
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