Tennis Ball Holder - for slitting balls

thingiverse

After reading about someone's difficulty slitting tennis balls for use on a walker, it occurred to me that a holder could greatly simplify the process, and perhaps help avoid injury. This is the first shot at a 3D printable holder. It's meant to be used with rubber bands to help keep things together while the ball is slit with a box cutter or razor knife. While investigating commercial alternatives (>$100, by the way), I found that teachers also use slit tennis balls on the feet of student desks to cut down on classroom noise. Perhaps you have another use. This is not a stellar OpenSCAD file, but if you can decipher it the variables below should help you modify things to your heart's content. Instructions Caveat - I have not printed this yet. I have an idea for a simpler version, depending on whether the person I was thinking of has a vice. This consists of two separate pieces, the upper and the lower. The lower holder can be printed with a low infill. The upper holder should be printed with enough perimeters to make it robust in the knife slot area.