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Tolerances specified on blueprints prepared
for ordinary machining methods should be reviewed for investment
casting. Frequently, cooperation between the design engineer
and the investment caster will result in the development of
a scale of tolerances that will be more practical and advantageous.
The design and alloy involved affect the
tolerance range and should be considered separately for each
part.
For castings of 6 inches or less in the
greatest dimension, the following table may be used as a guide:
DIMENSION (in inches) TOLERANCE (in inches)
0.000 to 0.500 +/- 0.005
0.500 to 1.500 +/- 0.010
1.500 to 2.000 +/- 0.015
Each additional in. +/- 0.003
We welcome the opportunity to consult with
you regarding proposed designs and to submit more precise
tolerance information for a specific casting.
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