Need to cut an 1.5" X into 96 tennis balls. (To attach to classroom
chair legs, if you must know ;-)

So far, a box cutter is not getting it done, neither a small "cutting"
wheel from a dremel kit

Best so far is with ball held in a vise, and using a miter box saw to
cut 2 1.5" slits in ball to form X. But this is a bit tedious for 96 x 2
cuts.

Thought of a table saw, but fingers would be too close to blade for my
comfort

Tried looking for a dremel type cutter that would go in a drill motor,
but haven't seen anything I want to pay for if it does not work any
better than miter saw.

Any suggestions ??

Someone else, besides me, mentioned drilling a hole. What about
using a step drill bit?



I can't read the OP's mind but I think he wants to cut

an X so it fits over a square / rectangular chair leg ?

not a hole ...

I'd try heavy shop snips / tin snips - be surprised if it was
anything but easy ... draw the X with a marker ;
snip a spot in the centre ; snip 4 3/4 " cuts out from the
center ; repeat. 96 times.
John T.