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Cutting Aluminum SMS 04-03-2008
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Posted by SMS on April 3, 2008, 11:41 pm
I bought a 10" metal cutting wheel for a miter saw to cut aluminum, but
it really doesn't work too well. It cuts it, but it's not a straight
cut, presumably because the cutting wheel is flexible, and the motor
isn't fast enough.

I ordered this blade "http://www.amazon.com/gp/product/B00006407O" but I
may return it unopened if it's not going to work well.

Is a 14" chop saw necessary for cutting aluminum (3/16" flat bar)?

Are most of the chop saws 14" because this effectively lowers the speed
of wheel across the metal?

I saw a 6" chop saw that runs at 9000 rpm, which is close to the speed
of a 14" chop saw running at 3900 rpm.

Posted by BobK207 on April 4, 2008, 12:06 am
> I bought a 10" metal cutting wheel for a miter saw to cut aluminum, but
> it really doesn't work too well. It cuts it, but it's not a straight
> cut, presumably because the cutting wheel is flexible, and the motor
> isn't fast enough.
>
> I ordered this blade "http://www.amazon.com/gp/product/B00006407O" but I
> may return it unopened if it's not going to work well.
>
> Is a 14" chop saw necessary for cutting aluminum (3/16" flat bar)?
>
> Are most of the chop saws 14" because this effectively lowers the speed
> of wheel across the metal?
>
> I saw a 6" chop saw that runs at 9000 rpm, which is close to the speed
> of a 14" chop saw running at 3900 rpm.

I cut aluminum all the time on my Makita 10"

A good blade is a triple chip(?) grind which is what your blade
appears to be.

If I'm only making a few cuts I just use my regular carbide blade.

Slow & steady feed and it should work fine. I'm surprised you're
having trouble.


cheers
Bob

Posted by Red Green on April 4, 2008, 12:47 am

> I bought a 10" metal cutting wheel for a miter saw to cut aluminum, but
> it really doesn't work too well. It cuts it, but it's not a straight
> cut, presumably because the cutting wheel is flexible, and the motor
> isn't fast enough.
>
> I ordered this blade "http://www.amazon.com/gp/product/B00006407O" but I
> may return it unopened if it's not going to work well.
>
> Is a 14" chop saw necessary for cutting aluminum (3/16" flat bar)?
>
> Are most of the chop saws 14" because this effectively lowers the speed
> of wheel across the metal?
>
> I saw a 6" chop saw that runs at 9000 rpm, which is close to the speed
> of a 14" chop saw running at 3900 rpm.


Is this what you tried? These are pretty rigid...and fairly cheap <$10 depending
on size.

http://www.nortonconsumer.com/Data/Element/Node/ProductLine/product_Line_edit.asp?ele_ch_id=L0000000000000002602

Posted by SMS on April 4, 2008, 10:29 am
Red Green wrote:
>
>> I bought a 10" metal cutting wheel for a miter saw to cut aluminum, but
>> it really doesn't work too well. It cuts it, but it's not a straight
>> cut, presumably because the cutting wheel is flexible, and the motor
>> isn't fast enough.
>>
>> I ordered this blade "http://www.amazon.com/gp/product/B00006407O" but I
>> may return it unopened if it's not going to work well.
>>
>> Is a 14" chop saw necessary for cutting aluminum (3/16" flat bar)?
>>
>> Are most of the chop saws 14" because this effectively lowers the speed
>> of wheel across the metal?
>>
>> I saw a 6" chop saw that runs at 9000 rpm, which is close to the speed
>> of a 14" chop saw running at 3900 rpm.
>
>
> Is this what you tried? These are pretty rigid...and fairly cheap <$10
depending on size.
>
>
http://www.nortonconsumer.com/Data/Element/Node/ProductLine/product_Line_edit.asp?ele_ch_id=L0000000000000002602

Yes, that's what I'm using, a cutting wheel. I think maybe it's too
flexible. The cuts don't come out straight, and they're not too clean.

Posted by BobK207 on April 4, 2008, 11:57 am
> Red Green wrote:
ews.sonic.net:
>
> >> I bought a 10" metal cutting wheel for a miter saw to cut aluminum, but=

> >> it really doesn't work too well. It cuts it, but it's not a straight
> >> cut, presumably because the cutting wheel is flexible, and the motor
> >> isn't fast enough.
>
> >> I ordered this blade "http://www.amazon.com/gp/product/B00006407O" but =
I
> >> may return it unopened if it's not going to work well.
>
> >> Is a 14" chop saw necessary for cutting aluminum (3/16" flat bar)?
>
> >> Are most of the chop saws 14" because this effectively lowers the speed=

> >> of wheel across the metal?
>
> >> I saw a 6" chop saw that runs at 9000 rpm, which is close to the speed
> >> of a 14" chop saw running at 3900 rpm.
>
> > Is this what you tried? These are pretty rigid...and fairly cheap <$10 d=
epending on size.
>
> >http://www.nortonconsumer.com/Data/Element/Node/ProductLine/product_L...
>
> Yes, that's what I'm using, a cutting wheel. I think maybe it's too
> flexible. The cuts don't come out straight, and they're not too clean.

SMS-

The Norton abrasive blade you're using is better suited to ferrous
materials not so good with aluminum.

Unless you've got dozens of cuts to make, you will get very good
results with just about any sharp carbide wood cutting blade.
Just go easy & don't blog the saw. Steady, light to medium tool
pressure.

That Freud blade is perfect, you'll be happy with it.

cheers
Bob

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