[TheForge] brainstorming and other thoughts on cutting sheetmetal

Mon Dec 30 20:05:59 2002

plymetal?

How about glue, epoxy or hot melt a stack together, clamped just till set,
cut a stack, then burn off  glue when finished.

Mike McKim

> So Terry,
>     Have you considered stacking several plates of stock together to
increase the
> thickness being cut?  Maybe use some double sided masking tape to bond the
sheets
> together while cutting which may also act to cushion the steel and lessen
vibration.
> Just a thought.
>
> Larry
>
> "terry l. ridder" wrote:
>
> > hello steve;
> >
> > i have a delta machinery metal bandsaw, nearly identical to the harbor
> > freight horizontal bandsaw. i tried using a bimetal 24 tpi blade to
> > rough cut the rose petal disks. that did not work well at all. there are
> > not enough teeth in contact with the 24 gauge sheet metal. i have not
> > found a source for 64-1/2inch x 1/2 bandsaw blades with higher tpi.
> >
> > 24 gauge is roughly 0.025 inches thick.
> > 24 tpi is roughly one tooth every .042 inches. at best there is only one
> > tooth cutting at anyone time, but there are times when no teeth are in
> > contact with the material. really want at least three teeth in contact
> > with the material being cut at anyone time.
> >
> > 16 gauge is roughly 0.0625 inches thick.
> > i cannot compare this since i do not know what 'fine' teeth equates to
> > in teeth per inch.
> >
> > so basically, been there, done that, on to trying something else.
> >
> > jewelers saw blade 6/0 has 76 tpi. 76 tpi is roughly one tooth every
> > .013 inches. this would give at least one tooth in contact with the
> > material being cut.
> >
> > On Mon, 30 Dec 2002, Steve Bloom wrote:
> >
> > terrylr>
> > terrylr> At 01:08 PM 12/30/2002 -0600, Terry L. Ridder wrote:
> > terrylr> [snip] since i am using 24 gauge black sheet metal cutting with
an
> > terrylr> oxy-fuel torch is out ( unless someone out there would care to
share the
> > terrylr> secret of cutting it with an oxy-fuel torch. ). plasma torch
would be an
> > terrylr> option but still seems like overkill to me. a metal cutting
scroll saw
> > terrylr> was more what i have in mind.
> > terrylr>
> >
> > steve>
> > steve> Have you considered
> > steve> (1)  the cheap Harbor Freight band saw ($140..$170 depending on
sales)
> > steve> (2) with a decent base (beef up the one provided with shelving)
> > steve> (3)  a bimetal blade with fine teeth ($20), and
> > steve> (4) a sturdy vertical table (1/4" plate ~10" x 18" slotted for
the blade,
> > steve> welded
> > steve>       to an upright that clamps in the saw's jaws and is tall
enough to get
> > steve> the plate level with
> > steve>       the lower blade support) --
> > steve> If I can cut out knife profiles, templates out of 16 gauge black
steel,
> > steve> etc., it might
> > steve> work. Don't expect sharp curves but I've cut out copper roses on
mine with
> > steve> little problems
> > steve> other than a bit of deburring (flap wheels work nicely for that).
> > steve>
> > steve> Steve
> > steve>
> >
> > --
> > Terry L. Ridder ><>
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