- July 7, 2016 at 12:35 pm #14560
I bought some 1″ OD stainless Steel this week, and the flex difference is pretty obvious. I didn’t setup the dial indicator but took some quick pictures.
I had 6′ lengths of tubing supported on both ends and hung a 10lb weight form the center point. I took a picture from as level as I could get to illustrate the flex.
The standard EMT that we/I have been using was a bit more rigid than the .0185″ stainless curtain rod (too weak the bearings left a groove on the first pass).
The 316l stainless did better what I tested what was sold as .049″ and .083″ wall thickness. The .049″ is much better than the EMT but really close to the .080″ and about $10 cheaper per 6′.
I would recommend .050″ if you want to upgrade your machine and have some money to spend.
Attachments:July 8, 2016 at 12:28 pm #14635
Where do you find stuff like that?July 8, 2016 at 2:24 pm #14641
I found some at a hardware store (shower curtain rod), amazon, and a local supplier.July 8, 2016 at 2:43 pm #14642
I’m strongly considering ordering some of this unless I just go with regular emt.August 22, 2016 at 6:03 pm #16501
I’d like to point out that, for some reason, 0.065″ wall thickness 304 stainless steel tubes are about half the price of 0.050″ ones, at least at speedymetals.com (http://www.speedymetals.com/c-8276-round-tube.aspx?thickness=1). They seem to be the lowest price I could find – a quarter per inch or like $10 for 4′. 0.050″ on the other hand is $0.48 per inch, $19 for 4′.
I ordered custom cuts from them as I’m building an odd size 27″ x 40″ (to match a space under my desk where my MPCNC would have to be stored between uses). A bit more expensive than buying whole-feet size but beats having to invest in a tube-cutting tool and cut yourself.
Shipping was $20 though.
Attachments:October 31, 2016 at 11:47 pm #20386
1″ or 1.05″ OD SS Tubing Is 3/4 ID If i’m not mistaken… a quick search on amazon also confirmed that and really 1″ OD was 3/4 ID.. but this 316L stuff is $100 for a 3 footer……. that’s crazy expensive… any chance anyone’s used 304? I cannot get 316L locally and people want crazy money for it.November 1, 2016 at 3:41 am #20389
Uhh, if it’s 1″ OD and 3/4″ ID, then it’s 1/4″ thick wall! It’s crazy expensive because it’s crazy thick!November 1, 2016 at 12:35 pm #20411
wuddn’t that be 1/8″ wall thickness barry?
1″- 1/4″ = 3/4″
ur forgetting that its tubing so you would split the difference in half to find the wall thicknessDecember 14, 2016 at 10:33 am #22726
I just ordered some 304. When it gets here, ill do the a test and provide some pictures. I don’t have any 316l to compare it to, but maybe this info will help.
JohnDecember 14, 2016 at 12:55 pm #22730
@Walt, yea, you’re right! I ain’t got no good math, or english! 😉January 11, 2017 at 1:25 pm #24712
Andy “Bernie” BernsteinParticipant
What are you thoughts on tweaking the files and running 3/4 Gas Pipe or Rigid Conduit, both are 1.050″ Diameter. Should be a lot stronger than EMT and still reasonably priced (about $10/10 ft stick at any Menards/home depot). Or does the extra weight start to become an issue?January 11, 2017 at 3:50 pm #24726
Yea, now you’re throwing around a lot of extra weight.January 11, 2017 at 4:00 pm #24727
Plus all that extra weight actually makes the pipe more prone to sagging not less. what you want is added stability not added weight. while stainless is slightly more heavy than zinc plated, dots extremely more rigid along its span. there’s always going to be a trade off.January 11, 2017 at 4:36 pm #24731
my local source 1.5mm wall 304 stainless is really cheap. around 30 bucks for 6 meters.
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