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post #1 of (permalink) Old 06-21-2003, 07:57 PM Thread Starter
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chop saw vs miter saw?

So I have this very nice 10 inch compound miter saw and I want to cut some 1/2 inch square tubing. I picked up a 10 inch metal cutting disc that has the exact same rpm rating as the miter saw.

I next looked at the miter saw warnings....has kept me alive this long....and it says not to cut ferrous metals or masonry. Why?

How is this different from a chop saw?

Thanks,
Fritz
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post #2 of (permalink) Old 06-21-2003, 08:36 PM
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Re: chop saw vs miter saw?

Maybe because of the guards?
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post #3 of (permalink) Old 06-21-2003, 08:42 PM
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Re: chop saw vs miter saw?

How do the two blades mount? I would think that the metal cut off wheel would mount differently than a regular circular wood blade. On my metal chop saw the wheel has an arbor hole in the center that has a hold down plate which screws on, is the miter saw the same? Also what is the power rating of the miter saw, is it adequate to do what you want? If your tubing isnt that thick and the blade fits it should be okay though.
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post #4 of (permalink) Old 06-21-2003, 08:46 PM
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Re: chop saw vs miter saw?

Are the guards and/or housing made out of plastic? [img]images/graemlins/confused.gif[/img]
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post #5 of (permalink) Old 06-21-2003, 11:58 PM Thread Starter
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Re: chop saw vs miter saw?

1. Guards are made of plastic, but the sparks (yes, I did just go for it) just fly everywhere and don't seem to be affecting them

2. The motor is stronger than the lower end chopsaws at Lowes.

3. The blade mounts the same. Two arbor plates clamp the blade in place. The hole is the same size and everything.

It seems to be working fine. I'm figuring that the manuafactorer assumes that the average Joe won't know to buy a special metal blade before trying to cut steel. Maybe that's it.

Any other ideas or knowledge?

Fritz
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post #6 of (permalink) Old 06-21-2003, 11:59 PM
 
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Re: chop saw vs miter saw?

The sparks from ferrous metals will melt or otherwise mess up your guards, etc.

-jl
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post #7 of (permalink) Old 06-22-2003, 12:50 AM
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Re: chop saw vs miter saw?

I believe the difference is in the parts used to make them. I used my 10" miter saw with a metal blade and it cut fine but, the sparks destroyed the dust catcher (should have seen that coming [img]images/graemlins/blush.gif[/img]), and after I used it for a bit, the motor started screeching, I thought it was the brushes, but they were okay. A contractor friend said he destroyed his miter saw the same way, both of us were cutting a lot though. Maybe a few cuts noe and then is okay.
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post #8 of (permalink) Old 06-23-2003, 08:19 AM
 
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Re: chop saw vs miter saw?

My thinking is that in the long term the bits from the metal cutting blade and the shards of metal end up in the motor.
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post #9 of (permalink) Old 06-23-2003, 08:36 AM Thread Starter
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Re: chop saw vs miter saw?

Okay, I can buy that, now why doesn't that happen to a normal chop saw? The motors seems to be mounted the same.

Fritz
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post #10 of (permalink) Old 06-23-2003, 10:07 AM
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Re: chop saw vs miter saw?

The reasons for the ferrous metal warnings are because ferrous metals are magnetic metals...

I do not know if there are any permanent magnets in these saw motors but the motor will suck in and attract the metal dust. Plus the dust is electrically conductive, and highly abrasive on the motor bearings. Needless to say this is very hard on the saw. As already mentioned it is also hard on the dust collectors and plastic blade shields.

I believe the biggest difference is way the motors are sealed & shielded. I have 2 skill saws just for these reasons... The good one is used on wood only... The second is a $7 yard sale buy... It sees the nasty stuff like metal & concrete. When it gives up the ghost I will get a new one.

I hope this helps...if the saw is only used a few times per year you may not notice that the saw is wearing out... You may not even care...but if you earn a living with the saw... it will wear out much faster once you cut metal with it. The more metal the faster it will wear out.

But then what good is a saw that is never used?

Jeff


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