Non or partial fill

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%).