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HOLES AND POCKETS
Holes and pockets may be produced either by incorporation into the pattern
(provided size limitations, draft requirements and direction of draw are
satisfactory), or by insertion of separately made
cores. These cores will give a flexibility of design to the casting, but
generally at a higher production cost.
The limiting factors in casting holes and pockets are depth (L), degree of draft
(d) and the narrowest dimension across the hole (a).
Because of the diverse nature of cored holes, it is best to
consult your foundry on aspect ratios and core capabilities. Remarkable
complexity can be achieved.
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