Paul you asked if I had 2d software earlier today, could'nt find where I
  read it, answer is, I don't, but if you send some 2d files, I will get
the
  program for the drawings you send, then get working on collecting the
  components for a hollow shaft reduction unit.

  Ed Carver

 There is low cost program called Q Cad for XP.
 That works fine and I can send you dxf's that will load
 into that. That will give you the dimensions of the parts
 that you can print.



http://www.qcad.org/qcad_****downloads.html<http://www.qcad.org/qcad_**downloads.html

<http://www.**qcad.org/qcad_downloads.html<http://www.qcad.org/qcad_downloads.html

 I have a free version that came with UBuntu Linux.

 Paul Lamar


Is Q Cad still bundled with Ubuntu downloads?
I'll buy Q Cad if not. The freeware has a 15min limit, then shut down.

Thanks!
Ed Carver


15 minutes may be enough for printing.
Are you running Ubuntu?
I am not sure qcad is still free for ubuntu.

In any event here is a dxf for part of the coupler.

Paul Lamar

Ed

DraftSight is available for free for most Linux (yes Ubuntu) and
Windows systems. It will read AutoCAD files (dwg & dxf) and has many of
the AutoCAD commands.


http://www.3ds.com/products/**draftsight/free-cad-software/<http://www.3ds.com/products/draftsight/free-cad-software/

Don Dessert




Ed Carver,   There is software free for downloading at the Autocad site
that will read  and print .dwg  and  .dfx drawings useing whatever printer
is connected to the computer. This one is called  "true View"  Also there is
another newer download that allows you to make corrections to a drawing and
e-mail it back to the designer.  I installed true view in one of the office
computers when I did field engineering or substeel drawings so I could print
assembly drawings and cut lists for the construction crews and electrical
schematics.  You can not measure the drawings but if the dimensions are on
them you will know what it looks like and have the dimensions to build the
parts.There are no time limits, file size limits, or redistribution
limitations.
      At one time Autocad was the industry standard, however todays
competetive software market has made developers eliminate importing  format
extensions of major competitors. I use rhino4 which doesn't import other
usable formats, however I also have Rhino 1.1 which will read the lines and
arcs of autocad drawings and open them. It doesn't import the lofted or
extruded solids so I have to loft again but at least it is saved in .3Dm
that I can import into Rhino4.
      Most CAD software accepts .stl  and .iges and .stp but they are
useless once imported because you can not use object snaps to take accurate
measurements or alter the shape of the solids. They also tend not to render
well if at all. Formats such as .stl are however usefull to make CNC parts.

george grimes