Radius Turning Tool - part 1

While making the machinist's jack I needed to profile a ball on the end of the screw. Rather than attempt to bodge it I thought it would be worth making a radius turning tool which I can use for a range of diameters. This design will enable balls up to 2in to be machined on a Myford lathe. It should also enable balls to be turned close to shoulders which is required for the job at hand. This is part 1 of 5 videos. 00:00 Requirements of tool shown on lathe 00:50 Design layout and detail drawing of base 01:56 Setting up 3in diameter stock for turning 02:02 Profiling outside 02:30 Correcting misplaced centre-drilled hole! 02:51 Boring hole for table to locate in 03:17 Revised base design to improve location of table 04:41 Drilling out clearance hole 05:29 Preparations for parting off 07:13 Parting off on 3in diameter 08:46 Finishing other side in smaller lathe 09:44 Milling deep slots for hold down bolts 12:15 Milling 1/4in slots for studs 13:14 Showing completed base in position on lathe cross-slide 14:18 To be continued...