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Posted by Jim Yanik on December 18, 2006, 10:46 am
> I have some sheet metal that I need to cut for a project. It needs to
> be a cleaner cut and more accurate than can be achieved with tin
> snips.
>
> I considered buying a 7 1/4 inch cutting wheel (if they make them in
> that size) and using it in my Skill saw.
>
> My brother said he had heard that taking a regular saw blade and
> turning it over so it rotates in the wrong direction, works well for
> metal cutting.
>
> Anyone ever used this method or have any suggestions - pro or con?
>
> Thanks in advance
>
>
rent a compressor and a air nibbler.(used on autos to install sunroofs)
--
Jim Yanik
jyanik
at
kua.net
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Posted by on December 18, 2006, 11:09 am
Bob wrote:
> I have some sheet metal that I need to cut for a project. It needs to be a
> cleaner cut and more accurate than can be achieved with tin snips.
>
> I considered buying a 7 1/4 inch cutting wheel (if they make them in that
> size) and using it in my Skill saw.
>
> My brother said he had heard that taking a regular saw blade and turning it
> over so it rotates in the wrong direction, works well for metal cutting.
>
> Anyone ever used this method or have any suggestions - pro or con?
>
> Thanks in advance
It might help if you could be more specific than "metal", since that
includes
annealed aluminum to stainless steel. IOW, a huge range of physical
properties.
Huge variation of machinability.
Shear and deburr.
J
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Posted by Steve B on December 18, 2006, 12:19 pm
>I have some sheet metal that I need to cut for a project. It needs to be a
> cleaner cut and more accurate than can be achieved with tin snips.
>
> I considered buying a 7 1/4 inch cutting wheel (if they make them in that
> size) and using it in my Skill saw.
>
> My brother said he had heard that taking a regular saw blade and turning
> it
> over so it rotates in the wrong direction, works well for metal cutting.
>
> Anyone ever used this method or have any suggestions - pro or con?
>
> Thanks in advance
>
>
Cutting sheet metal is tricky, even when you do it right. I have used a
pneumatic tool that looks like three fingers stuck out. I have used snips.
I have used a blade on a saw, but it makes so much noise and jumps so much I
think I only used it once.
Accurate cutting is difficult. For me, there was a lot of time finishing.
Taking an electric wire brush, and knocking down the razor sharp edges.
BUT, this is tricky, and it is easy for the material to kick. Always have
the material clamped down, and always feed the material in such a way to
avoid kicks. Hand files and a good old sanding block are standard tools,
too.
I have heard people using electric snips and hand scissors, but I have no
experience with them. I believe if I had a lot of it to do, I'd invest in
one of them, but only after much investigation and trial use. Manual hand
cutting is very hard on the hands, both muscularly and lots of cuts. I'm
sure there's something that would work for you that would give you the cut
you need. It may cost a few bucks, but when you get a finished product
without much additional finishing, it's worth the cost.
Steve
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Posted by on December 18, 2006, 12:44 pm
wrote:
>I have some sheet metal that I need to cut for a project. It needs to be a
>cleaner cut and more accurate than can be achieved with tin snips.
>
>I considered buying a 7 1/4 inch cutting wheel (if they make them in that
>size) and using it in my Skill saw.
>
>My brother said he had heard that taking a regular saw blade and turning it
>over so it rotates in the wrong direction, works well for metal cutting.
>
>Anyone ever used this method or have any suggestions - pro or con?
>
>Thanks in advance
>
If you don't have much to cut you can get good results by sandwiching
it between 2 pieces of plywood and cutting with a circular saw.
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Posted by L Ectro on December 18, 2006, 3:34 pm
Bob wrote:
> I have some sheet metal that I need to cut for a project. It needs
> to be a cleaner cut and more accurate than can be achieved with tin
> snips.
>
> I considered buying a 7 1/4 inch cutting wheel (if they make them in
> that size) and using it in my Skill saw.
>
> My brother said he had heard that taking a regular saw blade and
> turning it over so it rotates in the wrong direction, works well for
> metal cutting.
>
> Anyone ever used this method or have any suggestions - pro or con?
>
> Thanks in advance
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