Last edited by cheese1566; 04-12-2021 at 07:00 PM.
Visit my projects at: http://cheese1566gunsandstuff.shutterfly.com/
Simple design, should work just fine once you get it calibrated.
Randy
"It's not how well you do what you know how to do,,,It's how well you do what you DON'T know how to do!"
www.buchananprecisionmachine.com
All the indicator does is give him a stopping point that insures that the same amount of force is put on the Penetrator every time.
In other words you just turn the screw until the indicator reads Zero and then you measure the size of the dimple created by the Penetrator.
The only variable is the hardness of the material you are testing.
Randy
"It's not how well you do what you know how to do,,,It's how well you do what you DON'T know how to do!"
www.buchananprecisionmachine.com
It’s based off the style of the Cabine Tree tester. It’s made from basic 3/4”x2” steel stock and a harbor freight dial indicator. A 1/2” bolt holds the spring I found at a local hdwe store. The hand wheel was turned from aluminum as was the threaded pointer.
Once the boolit is lightly touching the point, the dial is turned one complete turn. Then the dial measurement is made and recorded.
I hade some soft clip on WW, 22LR range lead, clip on WW, and Linotype to make boolits for known references. Then I compared the Brinnel hardnesses from several resources (Cabine Tree/Saeco/LASC website/Lyman books to make a reference chart and graph. In the future I’ll make more measurements of the aged WW and quenched WW boolits form more data.
Last edited by cheese1566; 04-18-2021 at 11:43 PM.
Visit my projects at: http://cheese1566gunsandstuff.shutterfly.com/
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |