Stainless Steel Conduit ?

This topic contains 13 replies, has 4 voices, and was last updated by Profile photo of Sergey Drobyshevskiy Sergey Drobyshevskiy 11 months ago.

Viewing 14 posts - 1 through 14 (of 14 total)
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  • #14524
    Profile photo of Benjamin Shaw
    Benjamin Shaw
    Participant

    I’ve seen some people posting about ways to strengthen the conduit, such as filling or other materials. While looking for the exact wall thickness of the conduit on McMaster, I ran across a stainless steel emt. Although much much more expensive, would there be any benefit to using stainless for more rigidity, particularly in larger formats? Also, would the stainless surface be smoother, or more straight?

    I found this conduit here

    #14535
    Profile photo of Ryan
    Ryan
    Keymaster

    If you are willing to spend more, get stainless steel tubing.

    I have 2 different wall thickness pieces coming today or tomorrow. See if it makes much of a difference in rigidity. The thin walled stuff I have just deformed from the bearing load, it is smooth as silk though.

    #14537
    Profile photo of Benjamin Shaw
    Benjamin Shaw
    Participant

    The stuff you have on the way is stainless? You tested thin wall stainless and it deformed? Where do you source thin and thick emt?

    Thanks,
    Ben

    #14539
    Profile photo of Ryan
    Ryan
    Keymaster

    Yes stainless on the way. I have a fairly local shop that sells stainless tubes but I want to test this out before I make the drive. Yes the tin walled deformed, (0.0165″) Pretty sure I have .032 and .065 or .092 on the way. The .0165 is just a bit less rigid that standard emt silky smooth exterior but too weak walled.

    Emt I usually get from the hardware store.

    #14541
    Profile photo of Benjamin Shaw
    Benjamin Shaw
    Participant

    Nice. Ill have to look around locally as well. I work at a facility where we laser cut and engrave stuff like this, but I don’t think anyone would cut me a deal on it.

    Tubing

    #14557
    Profile photo of Ryan
    Ryan
    Keymaster

    Whoa!

    I just got mine from Fedex, looks real nice. I did a quick and dirty flex test. I will upload some pics in a new thread.

    #14558
    Profile photo of Benjamin Shaw
    Benjamin Shaw
    Participant

    Nice! Looking forward to it.

    #14565
    Profile photo of Ryan
    Ryan
    Keymaster
    #16475

    Guys,

    as I’ve found – at my place it is much easier to get aluminum conduit, comparing to the stainless steel for building the MPCNC.
    But I havent found any pros/cons on using aluminum tubes. Can anyone advise?

    #16477
    Profile photo of Barry
    Barry
    Participant

    Yea, it’s been tested already. Doesn’t work, just deforms from the bearings.

    #16479

    Thanks Barry!
    I think I’ve found the tubes, including cutting into appropriate sizes.

    P.S. Sorry for noob question – but actually I haven’t found any specifications for conduit needed. All I’ve found is that it is not recommended to make any of lengths more than 1m without any support.
    What is recommended thickness? (i found 1.5mm and 2.0mm. Going to use 1.5)
    What about lengths of moving tubes ? (or they are the same as main dimensions?)
    What is Z length?

    #16484
    Profile photo of Barry
    Barry
    Participant

    My gantry rails are the same as the sides. Think my Z is 11ish inches.

    #16490
    Profile photo of Ryan
    Ryan
    Keymaster

    @Sergey Drobyshevskiy
    Have a look here at wall thicknesses, Stainless Steel – Quick and dirty flex test, I put the suggested thickness in a few places for Stainless, EMT is Standard and does need me to specify. Here, http://www.vicious1.com/assembly/conduit-rails-tubes-pipes/, is a calculator for sizes. Anything over 1M should have supports at least mid-span if not more.

    #16510

    Thanks a lot guys!! Due to some reason I missed that page in Assembly guide!

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