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Ted Mooney, P.E. RET
Pine Beach, NJ

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Problem Machining Aluminum

I am machining aluminum 356 and white spots freckle the entire machined surface. I do not have any other surface treatments but simply need to remove these spots. Someone please end my suffering!

John Ridings
- Spartanburg, South Carolina
2003

First of all I'd try to eliminate the cause of the specs. Are they there before you start your machining operation? If they are not, I'd look into your cutting fluids or environmental conditions.

AF Kenton
retired business owner - Hatboro, Pennsylvania
2003

The spots are very probably pits or cold shuts in the casting. Buy a better quality casting from a better shop.

James Watts
- Navarre, Florida
2003

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