On 26 Apr 2019, at 06:58, Gene Heskett wrote:
> a tooth style called ATBF, where a flat topped
> tooth is fitted between the angled teeth.
I use a table saw fitted with an ATB blade for cutting sheets of aluminium up
to 16mm thick. It works a treat, and gives a pretty fair cut, even on angled
cuts.
The ATB blade came with my old DeWalt radial arm saw, which I got second hand
from a chap who use to make flight cases for musicians (ali panels, angle
corners, etc).
Cutting thick sheet, the blade has remained tolerably sharp for a long time.
It's a bit larger than the 9 inch blade on the table saw, so there is very
little clearance, but just enough to work safely.
I cut blocks on my ancient reciprocating ('donkey') saw, and it is accurate but
slow.
I cut Acetal and Delrin bar on the reciprocating saw, with a very sharp and
relatively coarse-pitched blade. It's accurate but a bit slow. I'm too scared
to cut it on the radial arm saw, but I would welcome ideas as to how to cut
fast but accurately through Acetal bar from 32mm up to 75mm diameter, holding a
tolerance of +/- 0.5mm. The bar lying on the workshop floor is ready to be cut
into approximately 1000 slices, so any time saving would be valuable.
It's the old story: I turned a specimen on the spindle of the vertical mill,
partly as a demonstration of LinuxCNC, but the job has grown a thousandfold,
and the order keeps repeating - larger every time. But the sawing takes most of
the time.
Marcus
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