1.Making a spur gear. I pasted a drawing by the sprayer paste. drawing.[gear-1][gear-2][gear-3]

2.makes four kinds of gear. It's gear ratio 1/30.

3.This is Jig for gear turning. It is a washer and ø12mm aluminum pipe.

4.Holding it with the live center.

5.makes a holes with the drill to the bottom of the tooth. Because, the tooth cutting becomes easy.

6.sanding. #150.

7.Bracket of idle gear.

8.Spacer of idle gear.

9.The flange unit and ø12mm rod(SS400).

10.Drilling for M6 tap.

11.Drilling to coupling. ø10mm.

12.Drilling to coupling. ø12mm. Used taper shank drill.

13.Tapping M4.

14.Frame. Drilling for pivot.ø35mm.

15.Making a pivot. 35mm dia.

16.It glues pivot to the frame.

17.The sector plate. idol gear mounts on this.

18.fix a flange unit and nut on frame.

19.assembly of frame.

20.temporary assembly.

21.Face plate.adjusting a wave of out side.

22.Tapping M6.

23.adjusting a wave of circumference side.

24.mounting a gear. It is 60 tooth.

25.Connects to the lathe. The gears turned very smoothly. I thinks that this project was succeed.

26.Next time, I will introduce the test run to you.

27.The screw of twin in the trial run is made. A round stick is set in the lathe and the router is synchronized, and it moves, and the number of the face plate is matched to "0", the bolt at the center of 60 teeth gear is tightened, and the movement of the router is synchronized with the rotation of the lathe about the rightmost edge.

28.The spiral of 52.5 mm is made when turning a handle.

29.Shifts by 180 degrees.Returns a router to the start position.Slackening screw of gear, it turns and it adjusts a face plate to number "12".

30.At first, it was favorable but the spiral pitch shifted.When attempting to check each part, a screw was loose.

Retry.This time, it became a beautiful twin-screw.

32.Remodeling to use large spur gear. The knob is moved to the other side.[drawing-2][gear-4]

33.I remodeled the fingernail-nut. It is M6 nut.