I have had this problem with cable as small as 1/8" and smaller. I do
a lot of crimping on small size wire rope and have the crimper that
looks like a bolt cutter with notches in the jaws. The hardware store
has two sizes, one goes through 1/8" and the other goes up to 1/4" I
have the small size, and both of them have a special cutter built into
the crimper. It looks like a hook and a flat jaw that shears the
strands while supporting them with 1/8" thick steel. I have used
diagonal wire cutters, tin snips, even hacksaw blades but they always
screw everything up. The cutter is the only way to do it that I have
found.