How Straight Are Aluminum Extrusions? 

Hi Allen, to put the aluminum extrusion precision into perspective it would be interesting to see the same measurements with other stock fence systems.

Cool stuff.. we use to make workbenches out of that stuff when I worked in the semiconductor industry. The stuff has been around for 15+ years.

Thanks for the review Allen. The extrusions have opened up a lot of doors for me. Thanks again for all you do.

Hi Allen. Hope you’re doing well. Good health to you since your cancer scare. 👍🏻

Thank u for good information. And which aluminium profile should I is use for table saw fence . Pls tel me

This is very informative video thank you so much. One thing is not exactly clear. When you're measuring the profile straightness across the face. One is concave one is convex, and there is no good explanation on that. If the slight tension would be the goal, all would be the same concave or the same convex. Why the difference ?

Thank you for sharing such a useful information. My project requires a lot of accuracy in precision, and this video cleared that to about 98 percent.

Can I use some of these for support structure on a 3 meters tall greenhouse with double glass? Would it be sufficient with a 4 x 4 cm beam? Does it have the same strenght on both the long and short side? Thanks!

I would very much like to know your preferred supplier for this material

For a piece to be extruded and not machined and to be at that tolerance is pretty impressive.

Hey Allen, Do you calibrate for a tenon jig, if so how? Is that available as an assessery‎?

Perfect information!

Miss you Allen - Hope all is well. Check in with us!

Love all your stuff brother slight annoyance the letters-wording takes up a good portion of the screen and since it is already in English to English is it reallyy needed.?? anyway I send every good wish from Scotland excuse typing parkinsons problems. Alistair

What is the stiffest extrusion?

I would be really interested to know, which woodworker does his projects to 0.002 inch? So no reason to worry about the straightness of this material (in my opinion).

Coupled to a rail of linear guides should be almost straight

I know it's irrelevant, but a light beam deflects due to the effects of gravity - so even a laser beam isn't actually perfectly straight.

Nice

More videos like this

a laser light beam would still bend from earth's gravity :b good video!

Hello WoodMan, Based on your extensive Metal experience, I am hoping you can guide me to some information. I am planning to build a frame for a CNC machine, using 4080 and 8080 extrusion from 8020. Extrusion is light, bolts together easily, but expensive... I was considering using maybe 3 x3 tube steel... which would require welding, etc... and I would obviously need to choose the wall thickness.... First, I cant really find any specs on the strengths of the steel... so it makes it harder to choose. The extrusion is like a web, which seems to increase it's strength instead of just a tube... Second, How straight/or twisted does steel usually come compared to extrusions?

Lasers bend due to gravity 🤙🏻