Making a machinist's jack - part 1

I finally decided the time has come to have a proper machinist's jack for use on the milling machine table. Cheap ones are available but quality ones seem expensive for what they are, so I decided to make one based on the Starrett design. In part 1 I make the body, packing pieces, and make a start on the ball mounted pad. I hope to complete it in part 2. 00:00 Introduction and the need for a jack 01:01 Choice of materials for base and packing pieces 02:01 Drilling and boring the base 03:42 Tapping the 3/8" UNF thread 04:09 External shape of base 04:32 Machining tapered base 05:59 Parting off base 06:13 Turning lock nut with knurling 07:56 Turning 1" spacer 09:22 Turning 1/2in spacer 11:16 Need for drawings & next component 11:55 Pad drawing 12:20 Turning blank for pad 13:10 Setting up slitting saw for cutting chequered pattern in pad 14:38 Cutting slots 16:08 Visual check on pattern 16:29 Set up for cutting V slot 17:55 Cutting V 18:39 Comment on deburring and closer look at result 19:44 Components made so far Music from You Tube audio library Last Cappuccino in Rio by Chris Haugen