Machining Metric Threads on the South Bend lathe -- For Two Dollars??? Part 2

How to add metric threading capability to an antique South Bend lathe for a total cost of - Could it really be two dollars? Let's find out. Part 2 of 2 How to add metric threading capability to an antique South Bend lathe for a total cost of - Could it really be two dollars? Let's find out. Part 1 of 2. This approach should work on any imperial lathe, but the ratio for the stud gear and qc gearbox settings may be different. I've written an Excel spreadsheet to calculate the stud gear and gearbox settings. It can be found at: http://www.homemadetools.net/forum/me...