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wierdscience
08-04-2008, 11:37 PM
Anybody have a source for aluminum support T-rail for 1" linear rod that doesn't cost an arm and a leg?

I can see the bearings costing what they do and I can see the rod costing what it does,but the stupid T-rail?It's a stinking extrusion:eek: :(

I've found plenty of sources for cheap linear bearings,but so far nothing on the support rails.

Evan
08-05-2008, 10:51 AM
Perhaps screw two regular L angles together?

ERBenoit
08-05-2008, 10:52 AM
McMaster-Carr has the rails only. 24" for a "C" note 48" two "C" notes. http://www.mysmiley.net/imgs/smile/confused/confused0056.gif (http://www.mysmiley.net)

A copule of years ago, we had a project at work using these linear guides. I sure didn't see anything in the rail supports to justify the price they want for the supports only. :confused:

Maybe not the exact profile, and a bit more work, but... any reason why you couldn't use a piece of "I" or "H" beam cut off one flange and surface the top of the web and mill a vee into the center of the web? Modify other flange to an appropriate width? http://www.mysmiley.net/imgs/smile/confused/confused0006.gif (http://www.mysmiley.net)

Scishopguy
08-05-2008, 12:49 PM
I had a project building shaker tables that used a linear bearing system. I think the source was Thompson Industries. Yes, it cost an arm and a leg but it was the professor's arm and leg. (grin)

wierdscience
08-05-2008, 01:18 PM
It's looking like standoffs will be turned out in bulk on the turret lathe.

I guess if I needed much of it the thing to do would be to have an extrusion die done and make my own label.

mbensema
08-05-2008, 10:01 PM
you probably will not find much cheap t-rail out there, you are paying for the accuracy of the machined extrusion, the cheapest way to do it would be to cut into pieces and only support at a several points along the length that would keep your deflection within the standards you want.

Some companies you might want to look into:

www.paletti-usa.com
www.hiwin.com
www.lm76.com
www.ikont.com

Not sure how the prices compare for what you are looking for, but they typically are less then the other name brands.

snowman
08-05-2008, 10:17 PM
how much do you need?

wierdscience
08-05-2008, 10:45 PM
The T-rail I already have is Thompson,only thing is it's not machined,just extruded.Different accuracy or gade maybe?

I need 2-10' lengths,but I don't think that's gonna happen.I think what I'll do is make some round standoff bushings with one end coped to a .5" radius and the other flat.5/16" allen capscrew through the center should do.

Thanks for the suggestions guys,now I have a date with a turret lathe:D

snowman
08-05-2008, 10:58 PM
Why not just buy some 1/2 x 1" aluminum bar. Mill them 1 foot at a time, milling a shallow V in each piece?

wierdscience
08-05-2008, 11:31 PM
Why not just buy some 1/2 x 1" aluminum bar. Mill them 1 foot at a time, milling a shallow V in each piece?

Thought about that actually,I could do that,infact I could do it in CRS and just use some 3" long pieces spaced every foot or so.Total gantry weight should be less than 40lbs.