1.I make a disk part.The material is a duralumin with 10 mm thickness.The duralumin is moderate hardness and the shear-ability is outstanding.

2.I manufacture using WT-300 from here.I remove Joe of the Axminster and I install a disk.I confirm a center using the dial gage.

3.center hole with the center drill.

4.I open hole ø6.8m/m under M8.

5.Tapped M8.

6.Next, I manufacture a boss.

7.Tapped M8.

8.Next, I tapped of M5 at the boss of the side of the turn.This is for the hollow setscrew.

9.I glue together the bolt of M8�~30L to the fixation boss.After that, I drum the spring roll pin of ø3m/m.

10.I force the hanger bolt of ø8m/m�~40L into the turn boss.

11.All parts were complete. Next, a assembly.

12.I turn the rotation boss 30degree and mark it by the needle.

13.I mount it in the Axminster chuck which removed Joe.

14.I tried. There is a eccentric of 12 mm and it is twisted. It is scary though it is interesting.

15.The material is beech.

16.I set a number to know a turn position.