This is a post copied from the blacksmith shops tool listing. Definatly a useful handmade shop saver!
The Pedal Vice
This is one of the most usefull tools you can have in a shop. Especially if your working with objects that are to hot to hold, you need both hands to weld, or you want to have 360deg mobility when filing or working an object.
Here are some pictures of the Pedal vice, and I will try to be a simple as possible in the description. Its not a a hard project if you can weld and have access to some basic metal working tools/supplies. I apologize for the lower picture quality. My wife took the good camera on her trip and I had to use my phone...
Pedal Vice:
So lets start at the bottom and work our way up... The pedal is pretty straight forward. It bolts in as a lever hinge and attaches to the bottom of the shaft. By depressing the pedal you push the shaft upwards...
On the other side of the base plate an attachment point and turnbuckle hold the bottom of the spring mechanism... the turnbuckle allows you to adjust the tension of the springs to your preferd strength.
About half way up the shaft another attachment point connects the top of the springs. These are garage door springs. This particular one is one spring bent in half to make it extra strong...With the attachment at this point when the pedal is free the shaft is pulled to its lower base ...closing the jaws at the top.
This is the catch assist mounted to the upper portion of the shaft. In this picture the pedal is free and the springs have pulled it to its lowest position...
When the pedal is depressed the lever acts to push up the shaft and your foot overpowers the springs. The catch assit hits the opening of the upper shaft and stops the shaft from opening any further than your preset amount. Its not totaly necessary but its nice to not bottom out the pedal every time you depress it, and it also keeps some tension on the springs which in turn keep it from popping loose if slacked...
The pedal is depressed, the shaft is pushed up overpowering the springs, and the catch has limited the jaws to opening to this amount...
By letting loose the pedal the springs draw the shaft back down to the lower attachment point and the force of the springs tension keeps your object squeezed between the jaws...
This vices jaws were made with the curved shape of a horseshoe in mind, but the size and shape of the jaws could be modified to meet whatever needs you would like.
So thats the pedal vice! Build one for yourself and free up those hands!
Thanks, if there are any questions please ask and I will try to answer them..
JP