On the TPI chart for the 5.75, 11.5, 23 & 46 threads using the 69T lower gear the shift lever setting should be R-X. As soon as I can figure out the apron gearbox ratios I will post it.įYI on the name plate on the head stock there is a typo for one of the lever selections. It is not password protected so if someone wants to experiment with different gear sizes you can turn the protection off and edit the drop down lists. The rest of the sheet is protected to keep from accidentally changing a cell with a formula. Click on the box to make a gear selection. Click on the cell to change and a selector box will show. I currently have it setup to select the gears with drop down boxes in the upper left. Visa versa when the change gears are set for metric threads the Thread per Inch table shows the inch equivalent. When the change gears are set for inch threads the Metric Pitch table shows the metric equivalent. It can show the thread pitch for both inch and metric threads for any change gear and lever/knob combination. ![]() I created an Excel spreadsheet calculator for the change gears for threading.
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