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Saeco Lead hardness tester
jimmcgeh@lisco.com
Member Posts: 116 ✭✭
Thinking about buying a lead hardness tester.Any info on the Saeco?
Jim
Jim
Comments
The formula I use is as follows--
BHN= pi * D * (D minus the squareroot of D squared minus d squared) divided by 2P
where D= the test sphere diameter
d= the indentation diameter
P= the pressure applied
All data used is converted to metric values, D=millimeters, P=Kgrams
Put into Excel makes the process easy.
I use a shotgun wad compression gauge that I calibrated with a handheld fish scale that is checked against a commercial scale. I press a .218 inch ball bearing into my sample at 60 pounds pressure for 15 seconds and then measure the resulting indentation. I have checked the process with soft lead to correlate the readings and they work out well.
Or, go spend your reloading component dollars on a hardness tester.
http://lbtmoulds.com/hardtester.shtml