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.
Attachments
3prongbototmbracket.dxf
4prongbottombracket.dxf
135deganglebracket.dxf
ari1to15Tbrace.dxf
ari3bracket.dxf
arisheadtubespacer.dxf
arisqbrace.dxf
bbhousing.dxf
cornerbracket.dxf
cwfix.dxf
cwhole.dxf
forkcrownworking.dxf
forkdropout.dxf
forkface.dxf
headtubebracketfinal.dxf
hwhole.dxf
hwfix.dxf
landsailfork.dxf
modropout.dxf
reardropout.dxf
recumtrike_1.dxf
recumtrike_2.dxf
recumtrike_3.dxf
recumtrike_4.dxf
recumtrike_5.dxf
recumtrike_6.dxf
seatbracket_1.dxf
seatbracket_2.dxf
seatclamp.dxf
telescopicbracket.dxf
trike_spindle_tube.dxf
trike3prongbottombracket.dxf
trikesteeringbracket.dxf
tsfix.dxf
tsholes.dxf
workingheadset.dxf
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.
18 Comments
Question 4 years ago on Step 2
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?
Answer 4 years ago
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.
Answer 4 years ago
Inkscape works fine with DXF files, and its a free download from Mozilla.
16 years ago
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.
Reply 11 years ago on Introduction
80/20 also makes them! contact: www.8020.net
13 years ago on Step 1
what program did you use to make the drawings? i have never seen a .dxf file, autocad is .dwg
Reply 13 years ago on Introduction
Autocad will load DXF files. It's a very popular import/export format among many different software packages.
13 years ago on Introduction
Where do you need to open the links ?
14 years ago on Step 1
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
15 years ago on Introduction
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
16 years ago
I'm building a chopper for my homecoming parade and I need a fat wheel for the rear where can I get one?
16 years ago
Cool!
http://www.atomiczombie.com
16 years ago
Love it :D
17 years ago
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?
Reply 17 years ago
also-- forgot to ask-- you wear a helmet, right? 'cause it looks like the balance is skewed to the rear...:o
17 years ago
I meant my cad progam (Bobcad) can't open these DXF files, unfortunately.
Reply 17 years ago
hmm. might be something to do with me uploading them via a mac. I'll investigate.
17 years ago
If it was a DXF file it could be easily loaded into a cad or even a cam program. Nice work!