Downloadable...
A working Rack and Pinion Gear to cut out and make. Print out the
pages of this model onto thin card, follow the fully illustrated
instructions and make your own working model .
The download consists of one acrobat file which will take no more
than a couple of minutes download. The file has three pages
of illustrated instructions for the easy construction of your
model and six pages which make up model sheets three for the front, three for the back.
Just the 
