I watched an old timer mill a 1/4" wide x 1" deep x 1" long slot in cold roll. Using a 4 flute 1/4" end mill, cranking the table across and up at the same time. Each traverse to 1/4" holes drilled at each end of the slot, he cranked the table up about .030". Kind of like a switchback. The result was excellent, the slot was smooth, straight and .003" oversized. I'd never known of this technique, do I live in a cave?
16 years ago