In alt.home.repair, on Sat, 20 Jul 2019 17:44:53 -0400,
wrote:

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 ??

Call a big old-age home, or a nursing home, and ask them how they do it.

Or a medical supply house that sells to consumers, sells walkers etc.
They may have special attachments that they woudl prefer to sell but if
you say you already have the tennis balls you may get a good answer