Non or partial fill Possible Fault Cause Solution Metal temperature incorrect
Increase metal temperature first before increasing the flask temperature (see burnout section).
Flask temperature incorrect
Increase flask temperature (see burnout section).
Incorrect feed / sprue system
Feed or gate should be attached to the thickest part of the casting. It should be at least 25% of the thickness of the casting.
Insufficient centrifugal force
Increase torque first and then RPM of the centrifugal casting machine. Only increase by small amounts each time (5%).
Low vacuum when vacuum casting
Change oil in pump on a regular basis. Check seals for blockages in the vacuum pipes.
Not enough over pressure
Only increase over pressure by small amounts each time (5%).