My idea for converting my 9000GN works perfectly.
In crimping a 2 1/2" shell in 600Jr press, it's necessary to raise the shell up 1/4". However, that isn't possible on a progressive press. But on the 9000, it isn't possible to either raise the shell, or lower the crimp die.
My idea was to lower only the internal profile of the crimp die(Thanks, Dave), without changing the way the die is secured in the press. The cam needs to still contact the roller on the die.
I accomplished the lowering of the internal die profile, by buying two new Crimp dies. First, I bored out one of the dies, straight thru. I did this by clamping the die on my Bridgeport milling machine, being sure it was aligned vertically. Using a deep hole boring bar, and machining out the entire internal profile.
Next, I took the second new Crimp die, cut off the side mounted arms, and chucking it in my lathe, turned it to a diameter so as to have a sliding, interference fit inside the first, bored out Crimp die. Using a two part epoxy, I cemented in the turned piece into the bored piece, but 1/4" lower.
The only other changes consisted of removing a 1/4" off the bottom of the side mount of the wad guide, and readjusting the spindex pre-crimp die, and the final 'taper die, both down 1/4". There is sufficient thread travel of these two dies.
After installing the new, modified final crimp die, no adjustment to the cam was required.
I ran a few single hulls through the cycle with no issues, so then ran a couple dozen hulls through in the normal manner.
The whole recipe for the 2 1/2" shell is the same as those run on the 600Jr press.
As is often the case with single stage charge bars, the bar on the 9000 also delivers less than the 3/4 ounce that it's supposed to drop, by about 12 pellets (#8), so I just lowered the top punch of the final crimp die. All crimps were satisfactory.
So much for MEC telling me a 9000 won't load a 2 1/2" shell.
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11-02-2022, 08:33 AM
Linear Mode
