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Discussion Starter #1
Looking at some of the shot that I’ve made every once in a while I’ll find a hollow sphere.
Does anyone else find these?
Erwin
 

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Discussion Starter #5
For my coolant I’m using water soluble cutting oil.
I might fine one shot in a hand full that’s like the hollow sphere.
I’m just wondering if I’m at the point of getting the lead to hot, or if its the mixture of lead I’m using.
 

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Check you drop distance into the coolant, Try shortening it up a bit. I use 3/16ths inch drop. Your coolant might be a little bit too thin also. I doubt it's because the lead is too hot.







Jim
 

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tatersalad ... I use water soluble oil and water in a three to two ratio and use a paint type mixer in a drill to mix the solution before adding it to the cooling tank.. I keep the coolant stored in plastic buckets between shot making sessions It sounds like there may be a pocket of coolant with not enough oil since the hollow shot are random.. Just a guess....
 

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I used to get a few shot like that. I thought, without any real evidence, that it occurred at first when my coolant was too cold.

Pat Ireland
 
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