This is my first instructable. Let's see if I am any good at this. The project is basicly a fairly simple machine intended to be used in cutting glass bottles to make :drinking glasses, rings, ashtrays and stuff i have not thought of yet.
Step 1: Materials and tools
1 beat up old bike with a single piece crank
1 old tire
5 bolts, carriage bolts or similar. These should be approxamatly as long as the radius of your crank
5 wingnuts sized and threaded to fit your bolts
10 washers sized to fit your bolts
5 compression springs large enough to fit around your bolts and as close to the bolt length as you can get them.
grease ( I like white lithium but your mileage may vary)
pvc cement or rubber cement
wrenches and or rib joint pliers
vise (a pipe vise is also helpful)
utility knife or box cutter