Re: 80/20 ?!?!?!
 

I've been looking around and haven't been able to find this so I was wondering if anyone knows what the weight comparison is between 1" x 1" 80/20 and 1" x 1" aluminum square tubing with either 1/16" or 1/8" wall thicknesses.

Re: 80/20 ?!?!?!
 

The entire 8020 catalog is on line and they have weight, tesile strength, etc all in there for both 1010 and 1" tubing ... http://www.8020inc.net/

1010 = .5097 lbs/ft pg 4
1x1 square tubing, .125 thich = .516 lbs/ft pg 81

Re: 80/20 ?!?!?!
 

We have never used it, not quite sure why but probably because we can buy aluminum angle, square tubing, round tubing, etc locally along with pop rivets and bolts and nuts.

Seems to me that the more universal a part is, the less likely it is to be "just right" for anything.

Re: 80/20 ?!?!?!
 

Hahahahahahahaha!!! Oh man.. that just made my day... lol :cool:

Btw, 80/20 1" "square" 1010 series has a hole in the middle of it as you may have noticed.

This is the perfect size to tap a hole for a 1/4-20 screw into.
That's usually the job the freshmen on the team get when they want an intro to manufacturing.
It's a simple task, and a prerequisite on our team to know how to tap those before moving onto more difficult tasks.

Re: 80/20 ?!?!?!
 

Sometimes people call it '80% of what you want for 20% of the effort'.

It's a system of extruded aluminum and fasteners that allow for quick and easy modifications. Attaching pieces of it together requires, typically, no more then hand tools.

The down sides are typical to any sort of modular building kit; Cost and weight. It's not cheap, and the fasteners aren't either. Because of the shape of the extrusion required to make the fasteners easy to use it's heavy for it's size.

It's a pretty high price to pay for the ease it offers. But a lot of rookie teams make use of it because you can toss a frame together with nothing more then a hacksaw and a wrench. If you don't have much in the way of tooling, or experience with frame building, it can be a godsend. Otherwise more traditional extrusions and fasteners offer much more.

Re: 80/20 ?!?!?!
 

Where can you order 80/20 from?

Re: 80/20 ?!?!?!
 

Ues this link to find a disributor near you. Tell them what you need and they'll send you a quote. Then you can send in your quote and get the parts in a matter of days.

If you want to order online, there is an Ebay-store that carries it.

Re: 80/20 ?!?!?!
 

We're using 80/20 this year for a elevator and with the linear motion slides they sell the whole system was easy to build and rather simple and doesn't weigh too much

Re: 80/20 ?!?!?!
 

We have substituted our Bible with an 80/20 catalog.

Re: 80/20 ?!?!?!
 

You can get some pretty good deals at http://stores.ebay.com/8020-Inc-Garage-Sale

Some of the stuff is auctioned (like 1010 extrusion), others items (like fastener hardware) is "Buy it Now".

You can save quite a bit of money through this e-bay seller. Don't forget to use the normal retail price when you do you cost accounting for the robot BOM.

Re: 80/20 ?!?!?!
 

what is 80/20?

Re: 80/20 ?!?!?!
 

It's structural extruded aluminum with special fasteners (like "drop-in" nuts) that can simplify building the chassis and other portions of the robot.

Team 980 has used 80/20 1010 extrusion for the chassis for years. It may be more expensive that square extrusion, but the strength/weight ratio and ease of assembly more than justifies the extra cost. This year, I purchased the 1010 stock for our robots on e-bay at a substantially lower price than what you'd pay at distributors. See my post above for more info (post #40).

BTW, before posting in CD, you should at least read the thread in which you're asking questions. Please read posts #11 (photo of 80/20 extrusion attached) and #35.