Production Process

Drawing 1

1.    Cut 150mm of 30mm diameter aluminium bar

2.    Centre punch and drill 8mm hole for the pivot pin using the pedestal drill. 

3.    Clamp the bar in a 3-jaw chuck on the lathe. Hold it from the end closest to the hole (approximately 110mm protruding).

Drawing 2

4.    Set up a Jacobs chuck and centre drill the end of the bar.

5.    Remove the centre drill and using an 8mm drill bit bore a 50mm long hole into the end.

6.    Measure 95mm from the end. Parallel turn the bar down to 28mm (auto feed can be used for an even finish). 

Drawing 3

7.    Measure 75mm from the end. Parallel turn the bar to 26mm (auto feed can be used for an even finish).

8.    Set the compound slide to 2o and taper turn the barrel until the end measures 20mm in diameter (do not machine past the shoulder)

9.    Measure and mark 7mm and 47mm from the end.

Drawing 4

10. Set the compound slide to 3o. Taper turn 40mm between the 2 marks until the shoulder measures 22mm in diameter.

Drawing 5

11. (SET LATHE  TO THE SLOWEST SPEED) Gently machine or file the sharp edge off edge stepped section.

12. Using emery cloth and wet/dry sanding paper smooth off all surfaces. 

Drawing 6

13. Remove the barrel from lathe the chuck. Turn the barrel around. Place the finished section completely inside the chuck and hold ONLY about 15mm of the un-machined section. 

14. Reset compound slide to 0o.

15. Measure 27mm from the end and parallel turn the back of the cannon down to 26mm in diameter.

16. Parallel turn 3 steps, each 2mm wide and 2mm deep.

a.    25mm from the end and 22mm in diameter

b.    23mm from the end and 18mm in diameter

c.    21mm from the end and 14mm in diameter

Drawing 7

17.  Turn the tool bit on the lathe to so that it is almost perpendicular to the work piece.

18. Make roughing cuts to shape the outline of the Cascabel 

19.  (SET LATHE  TO THE SLOWEST SPEED) Using a smooth file, shape the outside of Cascabel into a neat curve.

20. Move the lathe tool bit over and make roughing cut to shape the internal curve of the Cascabel.

21.  (SET LATHE  TO THE SLOWEST SPEED) Using a circular file shape the inside curve of the Cascabel.

22. Finish the Cascabel and the steps using a combination of smooth files and emery cloth until it is smooth.

23.  Using the buffer (ONLY the front lower quarter) buff the cannon barrel to a smooth shiny finish

Drawing 8

1.    Put a 56mm length of aluminium rod in the metal lathe (holding only 20mm).

2.    Parallel turn half the rod down to 7.9mm in diameter.

3.    Parallel turn 12mm of the rod to 6mm. 

4.    Turn the rod around (ensuring you are holding about 25mm) 

5.    Repeat steps 2 and 3. 

6.    (SET LATHE  TO THE SLOWEST SPEED) Use a file and emery cloth to smooth off the pivot pin.