For machining use only sharp tools as used for brass or
aluminum with high cutting speeds and low feed . In order to obtain
exact dimension machining should be done in several steps to allow
the component to cool down properly.
When drilling large diameters start with a pilot hole of 10 to 12
mm diameter maxmimum to avoidcracking.
When machined, all inside corners shuold be rounded to avoid failure
caused by the notch effect.
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