making-instruction with bore-through-technic
Step 4, working out the Bell-end
|If we are lucky and our hole is going through we start to work out the
The first part is done well with the normal chisel-iron.
|some time later...
the bell-end is about 28 cm deep.
|In the left side of the pic is shown a lamp, witch I use, to control a little bit what is going on inside the hole.|
|A try to look through the hole. The bell-end will be left like it is now. Only the diameter of the linear bore will be increased.|
|Email to Johannes||2005-12-03|