Frankford Arsenal X-10 Case Plunger
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Case plunger that can retract with a case and reduces the case hanging when not fully seated onto shell plate.
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This case plunger design will allow the plunger to retract into the case column with a case in the plunge and not damage the case.
NOTE: Currently only available for 9mm. However, I plan on offering plungers for other calibers as requests come in and I get the shell plate to test.
While working on this plunger, I also noticed that it reduced the frequency cases got hung up due to not fulling seating onto the shell plate. Running this plunger should eliminate the need for the case feeder guide, but can be used with the guide if you so choose.
Because the top and bottom are critical dimensional surfaces, I've offered the model as both a one piece object and a two piece split object. If you choose the two piece split object it has been designed to use two M3x6 indexing pins to align the part. The pins are not necessary, but does make alignment easier. If you opt not to use the indexing pins, it is recommended you super glue to the two pieces together.
Print Settings
Set resolution to 0.2, wall count to 6, your top and bottom layer count to 6, and infill to 25%.
If printing the one piece model, print with the supports on the bottom. If printing the split model, print each piece with the split on the build plate. Refer to the .3mf files for print orientation.
Post-Printing
If printing the on piece model, removal of supports is necessary. If printing the split model, either insertion of M3x6 pins or gluing the two pieces together. Some sanding may be required to remove any elephant's foot where the two pieces come together.
When installing on the press, you'll need to adjust the plunger such that cases reliably fall into the plunger.
During operation the plunger will be forced away from the shell plate as the case advances to station 2. Do not be alarmed this movement is designed into the plunger and assists with seating the case into the shell plate.