Why is it hard to make a buttress thread? || RotarySMP

Making a draw tube to mount Schaublin B32 collets on the Nikken 150-CNC rotary table, but the buttress thread didn't work out as expected. Epic fail!
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00:00 - Intro
00:34 - Adapting the Nikken 4th axis to Schaublin collets.
00:57 - Why a buttress thread?
02:06 - B32 collet adapter design
03:03 - Tool grinding the buttress thread tool
05:23 - Mail time
07:50 - Machining the draw tube
11:58 - Shrink fitting ans welding the flange
15:56 - Epic fail!
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