8020 Chopper





Introduction: 8020 Chopper

8020 is an industrial prototyping extrusion made from aluminium. I used it here to construct a chopper by joining the extrusions with water-jet cut plates of 1/4inch aluminum.

Step 1: Choose and Design the Type of Bike Frame You Wish For

Here are some of the options we designed at an MIT IAP class in 2003.

The CAD files are all included in this step.

Step 2: Choose the Connecting Parts From the Part Library or Design Your Own.

These parts will be cut from 1/4 or 1/2inch thick aluminum plate using a water-jet.



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    18 Discussions

    I realize its been 13 years, but I've been trying to view these files, and I can't find anything that works with these DXF files. how were they created?

    2 more answers

    I've tried inkscape, librecad, freecad, autodesk viewer, and www.zamzar.com. inkscape and librecad just show nothing. The rest generate error messages which tell me essentially nothing beyond "it don't work". Eg:

    There was an error processing your file. F1GL3LVBRDEP27R3GX.dxfPlease Try a Different FilePossible issues could be:
    • Your file may have external references which are not
    currently supported. • You may have used an older file version, which may not work. • Your file may be corrupted or encrypted.

    Inkscape works fine with DXF files, and its a free download from Mozilla.

    those rectangular extrusion things can be bought from a company with some german name. They're a little expensive though. People use them alot in robotics.

    1 reply

    what program did you use to make the drawings? i have never seen a .dxf file, autocad is .dwg

    1 reply

    Autocad will load DXF files. It's a very popular import/export format among many different software packages.

    hi,these don't seem to work on any cad file reader like CAD viewer,and i also tryed 2 more all give an error

    Congratulations!!! That's awesome. Now can you build the Recumbent Bike out of 8020? I hope you can do it. I wish you the best luck on your next 8020 projects. Bob Jackson

    I'm building a chopper for my homecoming parade and I need a fat wheel for the rear where can I get one?


    12 years ago

    Love it :D

    i love that 8020 goodness! i wonder if you've weighed the bike? also... i wonder if you wouldn't mind saying what it cost you, in the end?

    1 reply

    also-- forgot to ask-- you wear a helmet, right? 'cause it looks like the balance is skewed to the rear...:o


    12 years ago

    I meant my cad progam (Bobcad) can't open these DXF files, unfortunately.

    1 reply

    hmm. might be something to do with me uploading them via a mac. I'll investigate.


    12 years ago

    If it was a DXF file it could be easily loaded into a cad or even a cam program. Nice work!