If you’ve used a rolling mill on round or square wire you will have
noticed that not only does it get thinner and longer, but it also
gets wider. If you could predict it, it would be a great way of
making thin strip.
The application at http://www.ganoksin.com/gnkurl/ep7zwo
does this prediction. As long as your browser or smartphone has
calculations are done locally.
You input the width and thickness of the strip you want, and the app
calculates the size of the round or square wire you should start
with. Additionally, if you tell it the length you want, it will tell
you the length of the input wire.
Unless you are lucky, its unlikely that you already have wire of the
required input size, but its easy to make it from some that’s
thicker. Tell the program the thickness of what you have and it will
tell you how much you need in order to make required starting size.
Once you’ve got the starting size, roll it to the required width or
thickness in as few passes as possible.
A word of caution: unless you keep the wire at right angles to the
rolls it will produce a curved strip which is impossible to
straighten. I use parallel pliers against the rolls to hold it at a
The parallel pliers have a hollow hinge so the wire can go from the
jaws right through the hinge - the pliers and the wire are then at
right angles to the rolls. Since the pliers are much thicker than the
opening of the rolls, there is no possibility of them being caught.
Regards, Gary Wooding