Comments about the 1" EMT conduit from Thingiverse

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This topic contains 3 replies, has 2 voices, and was last updated by  SteveC 2 years, 6 months ago.

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  • #2161

    SteveC
    Participant

    This is just a copy of some of my comments from the Thingiverse page that I thought might be useful:

    It is called 1″ EMT conduit but it is actually .93″ outside diameter. I used Home Depot but Lowes should be the same thing.
    http://www.homedepot.com/p/Allied-Tube-Conduit-1-in-EMT-Conduit-101568/100400409
    http://www.lowes.com/pd_72715-1792-101568___?productId=3129555&pl=1&Ntt=emt+conduit

    3/4″-see comments below
    These are zinc coated steel and are very stiff. The bearings work a bit roughly at first, then the zinc coating rubs off under the bearing after a while making a nice smooth surface. I just ran some hand edited G code that moved the axes back and forth until the zinc wore down. Then I sanded them just a bit with very fine sandpaper to get the sharp edges off of the zinc “race”.

    I used a regular pipe cutter with many rotations of the cutter for a cleaner cut than with a hack saw.

    #2163

    baysail
    Participant

    Thanks for the tips! Great tip about smoothing the pipe. Damn now I have to back to harbor freight for a pipe cutter – I was just there. I was wondering about the edges after the cut.

    #2165

    SteveC
    Participant

    Using a pipe cutter does take strong hands and a lot of turns but the cut is very clean:

    Make sure to file the inside edges before routing the stepper wires through them.

    #2166

    SteveC
    Participant

    Correction to the dimensions and link:
    It is called 3/4″ EMT conduit but it is actually .922″ outside diameter and ~.82″ inside diameter. I used Home Depot but Lowes may be the same thing (measure it first before buying).

    http://www.homedepot.com/p/Allied-Tube-Conduit-3-4-in-EMT-Conduit-101550/100400406

    These are zinc coated steel and are very stiff. The bearings work a bit roughly at first, then the zinc coating rubs off under the bearing after a while making a nice smooth surface. I just ran some hand edited G code that moved the axes back and forth until the zinc wore down. Then I sanded them just a bit with very fine sandpaper to get the sharp edges off of the zinc “race”. I used a regular pipe cutter with many rotations of the cutter for a cleaner cut than with a hack saw.

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