Re: [bolger] Re: Reply to Susan Alum welding
- Pierce Nichols wrote:
>It's funny I have been working in machine shops all my life and did not
> On Tue, Dec 1, 2009 at 7:04 PM, Doug Jackson <svseeker@...
> <mailto:svseeker@...>> wrote:
> Aluminum in a word is awesome. And it's doable for a novice (me)
> even down to 1/8" sheet with $1K of MIG equipment. Here are the
> lessons I've been taught:
> And of course you can sell the equipment when you are done building
> the boat -- if you buy used and take care of it, you can probably
> recoup most (if not all) of the money you spend on it.
> There is a rule about not mixing steel and aluminum tools so you
> don't contaminate the aluminum with steel, but aluminium would
> only gum up a regular grinding wheel. I have an aluminum grinding
> disc, "Flexcel" on an old motor that works great for grinding.
> AirGas sells them for $10 each, but they last a good while.
> No, it's worse than that. My understanding is that the bits of smeared
> aluminum get down between the grains of s wheel meant for steel and
> that when they heat up again, they can expand enough to fracture the
> wheel. And that's just a bad day. Use the right tools for the job and
> things will go better.
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no that grinding aluminum on a grinder could cause it to blow up. I just
thought you didn't do it because it clogged up the wheel, Never too old
to learn something. It sure makes sense that somebody could get hurt
- Aluminum granules + iron oxide granules + heat = Thermite!
Maybe an unlikely outcome but one I will now have in the back of my mind every time I use our bench grinder at work. I am a mechanic and we have one grinder for everything that needs to be ground.
> It's funny I have been working in machine shops all my life and did not
> no that grinding aluminum on a grinder could cause it to blow up. I just
> thought you didn't do it because it clogged up the wheel, Never too old
> to learn something. It sure makes sense that somebody could get hurt
> that way.