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I'm need a 5" x 5" x 1" block of aluminium. Is this something I can buy online and are there different types of aluminum to consider? Will I have to buy a bigger piece and cut the aluminum down to my specific size?

I need a solid base that I can tap with hole to mount into a DIY slider dolly.

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I'd go scrounge around a junkyard if you have one near where you live. That's where I got all of my scrap metal for college design projects. If you get a big enough hunk of aluminum, it will often have the exact type stamped on it. Of course, you'll need access to metal cutting tools like a band saw or mill as well. – Doresoom Jan 27 '12 at 16:19
There are videos online about how to build your own very simple forge that can melt aluminum cans to make your own aluminum casts. A 5" x 5" x 1" block is probably a simple shape to cast. – mbeckish Jan 22 '15 at 14:17
up vote 9 down vote accepted

There are several online metal suppliers that will also make custom cuts. Online Metals is one that I have used. There is a minimum length that you must order (usually 1 ft) and a charge per cut. Depending on where you live you might also find a local metal supplier that can do the same for you.

Wherever you order, I'd suggest you get two 5" pieces cut from 1ft of 1" x 5" bar and then you'd have a spare. I would definitely try to have someone else do the cutting for a piece that size. Rectangular tubing might also be something to consider.

Here is a reference on the same supplier for the aluminum alloys they stock. Be sure to check the prices as they'll vary, but I believe 6061 is one of the more widely used alloys.

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I've had good experiences with Speedy Metals: speedymetals.com/… They'll sell you a 5X5X1" block of 6061 aluminum for under $14.00 plus shipping – Wayfaring Stranger Jan 22 '15 at 13:40

It's a little wierd to use such a thick block of metal for anything (except making a die or something), so you may want to rethink your design, whatever it is.

I would definitely check eBay first, because it will be a LOT cheaper than going to a metal shop. BTW the kind of dealer you want is called "non ferrous".

Some places will sell off cuts and scrap by the pound and once again that will be a lot cheaper than buying it custom. You do not say where your location is in your profile, so not sure what dealers are in your area.

As Jay says, get a pro to cut it, because setting up to cut metal, while not terribly difficult, sounds like it is beyond your skill level right now.

As for the type of aluminum, I wouldn't worry about it for something like this.

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