Drill Jigs Principles of Design Machinery ... - Evenfall Studios
Drill Jigs Principles of Design Machinery ... - Evenfall Studios
Drill Jigs Principles of Design Machinery ... - Evenfall Studios
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CHAPTER III<br />
EXAMPLES OF DRILL JIGS<br />
In the following will be given a number <strong>of</strong> examples <strong>of</strong> drill Jig<br />
designs for definite purposes, as employed in various shops in the<br />
country. No attempt has been made to show only jigs <strong>of</strong> which it can<br />
be said that the design is perfect or nearly so, but examples have been<br />
taken which indicate general practice, and attention has been called<br />
to wherein these jigs conform to the principles <strong>of</strong> drill jigs as treated<br />
in Chapter I, and also to the objections that might be raised against<br />
each particular design, if such objections have been considered in<br />
Fig. 39. Jig for <strong>Drill</strong>ing Holes In Studs and Shafts<br />
place. The names <strong>of</strong> the persons who originally contributed to the<br />
columns <strong>of</strong> MACHINERY the descriptions <strong>of</strong> the devices shown, have<br />
been given in notes at the foot <strong>of</strong> the pages, together with the month<br />
and year when their contribution appeared.<br />
<strong>Jigs</strong> for <strong>Drill</strong>ing Pin Holes in Shafts<br />
Usually, the simplest kinds <strong>of</strong> jigs are those intended for drilling a<br />
hole through the center <strong>of</strong> a shaft They <strong>of</strong>ten consist only <strong>of</strong> a
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