FILENAMES: Slitting-2.jpg DESCRIPTION: This is a picture showing a long key slot being cut with a mill. Posted by Tim Leech . Tim provided the following description: ================================================================= cutting long slots in a vertical mill, in this case using a 1/4" slitting saw. Cutter is held in a home made 1" / 3MT arbor, in a 3MT/30INT adaptor. Keyway is an alternative to a badly worn one in the feed shaft for my Elliott 02 Omnimil. The old keyway is still present on the opposite side of the shaft. Machine in use is Town Woodhouse (AKA Woodhouse Mitchell) turret mill.