Application
Fig. 13
There are instances when just cutting from the bottom of the die up to the margin is not as viable as it was in (fig. 12): the ten thousand of an inch (.010) blade chosen for its rigidity may be too thick for the closely spaced margins of the preparations; or the ideal angle of the cut from the margin side may differ from what would be ideal on the base side. Fig.13 Illustrates a problem case, many small preps and dowel pins in close proximity.
Fig. 14
The technique that could address both problems would be to pre- saw each section to a depth that is below the margins. Use a seven thousand of an inch (.007) saw blade to preserve the margins integrity. Then complete sawing through the distal of the # 22 and # 28 die (Fig.14). Recommendation: in order to provide greater visibility an offset saw- frame can be used for this procedure. Fig.14 illustrates the first steps to be taken the "pre-cutting", photo shows saw blade in the cut as it is being made. Also shows the two end cuts that will allow the section to be removed as a block.