Civil Engineering Reference
In-Depth Information
Fig. 8.14. The finished block is on the right waiting for cleaning up. It is about
10×10×10mm square.
PITCHING OUT HOLE CIRCLES
Here are some PCD charts for you to pitch out holes up to twelve divisions using linear
co-ordinates, although you can use a digital readout with a PCD facility if you have
one.
Not all numbers are covered because you can use some of the six-hole co-ordinates
to do three holes, and drilling four holes on centre is just a case of moving left and
right and forward and backward by the PCR (pitch circle radius).
