I purchased a used, and as I subsequently found, very used, machine and utilised it on many projects but was conscious of having to allow for the backlash in all the motions and the "jolts" as the knee suddenly dropped when trying to lower the table. As often happens the time came when it was decided that enough was enough and that something had to be done. The machine was partially dismantled to remove the motion nuts for examination. These are shown in photo 1. From left to right they are knee, table feed and cross feed. The corresponding threads are: 1. Knee -1" 5 threads per inch (TPI) left hand 2. Table feed - 3/4" 5 TPI right hand 3. Cross feed - 3/4" 5 TPI left hand Not obvious from the photograph is the state of wear on the thread in the knee nut or the way that the thread has worked itself out of the bore. Use has stretched the thread which was commensurate with the backlash.
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