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In that case practice on the bits you cut off.
Make sure the die is inserted the correct way, there is a taper on one side to easily start the thread.
Make sure when cutting the thread that you use a lubricant almost anything will do.
Every half a turn or perhaps a little more reverse the die to clear the cutting edge of chips.
Perhaps also put a slight chamfer on the cut end of the material to be cut.
Good luck.Do not be tempted to use a die nut, they are only really to be used to clean up existing threads.
freezing77
I have lots of broken seat clamps, (the plastic cam thing is all mangled on them). And also loads of shimano front skewers which are surplus. it would be satisfying making a long lasting fix out of stuff I already have.
By loads I mean between 20/30 and bikes to put them all on so the cost of the kit wouldn’t be so steep per clamp. Never cut threads before 🤔...