Numerous jigs have been necessary in the construction of the Bombe.

Many have been made by members of the team.

In the view above, in the centre are the sets of jig parts that are used to drill and tap the fixing and lubricating holes in the main bushes. In these bushes run the 111 main drum shafts shown on the left. On the right is a jig kindly donated by PARSELL of Nottingham, one of our supporting companies. This was used to punch out the special switch mounting holes in the main switch panel

Here the same main bush and switch jigs are shown. At the back are those used to accurately drill the four long, heavy horizontal bars. Middle right is a drilling jig used for the large number of support spacers fitted between the front and rear plates

More jigs will be seen on other pages

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