Replacement Cartridges

Hi all,

I've been messing around in my workshop seeing if it is possible to make replacement modelgun cartridges. Making one or two is fairly simple but making large(ish) batches that are identical and interchangeable is a little more complicated.

I've tweaked the design from the original Hudson cart to strengthen the rim and nose (my one on the left). These are currently without internals (piston/primer) but they can be reused from damaged carts.



8ace

Looks like a design improvement, too! Possibly feeding better with the smoother cartridge body and chamfered rim.

Looks so good this must be that newfangled 3D printing ;-)

Cerwyn wrote:

I can vouch for these custom cartridges   I have 50 which are proving to be far stronger than the original Hudsons. Rims and cart noses are virtually unmarked after several times through my PPSh41
Very highly recommended !         

I have not tried 8ace' PPHS cartridges (yet) but i can certainly vouch for 8ace's work
nice good looking, i believe he has the the grip of making modelgun parts

How did you make it ?
I was planning to buy a 3D printer to try to make replacement cartridges for a Hudson AK-47 (not sure whether it will work).

Hi,

Sadly carts can't be 3D printed due to the very fine thread joining the two halves. They have been made from brass on a lathe.

I'd recommend getting a 3D printer as I've just got one and have been having fun with it.

I have made some AK carts which are being tested before finalising the design. (4 new ones on the right)

Great work 8ace. What sort of lathe you making them on, as i have a myford super 7 and hoping to start making some soon. Are you screw cutting the threads or using dies.

mystikchepas wrote:

How did you make it ?
I was planning to buy a 3D printer to try to make replacement cartridges for a Hudson AK-47 (not sure whether it will work).

8ace is correct on the threading - the 3D printer will not be able to do that
next i am quite sure that the 3D printing base material will be too week to carry the forces in the rim, thus bog risc of breaking durring chambering or extraction.

i have not worked professionally with 3D printing in years now but do also see manufacturing tolerances as a challence for the 3D printing process

Go for the Lathe

That's really nice 8ace
If your cartridges are working I will for sure buy some of them !!!

Ok you have at least 2 buyers

I'm just curious : how long does it take to make one cartridge ?

Once setup it usually takes about 2-4 minutes to make each component so a complete cart would be around 10-14 minutes.

8ace

Great !
I thought it would take a lot of time !
Well when your AK-47's carts will be ready I buy them

With the CNC lathe setup the machining part is reasonably quick as there are no manual tool changes; if it took anymore time I’m not sure I’d be making them as the time needed to produce them would be prohibitive.

I’ll give you a shout when I start making them which could be in a month or so as I’m finalising the piston design.


8ace

Ok thanks !

Can't wait

I received my replacement carts today
It is a really nice job.
Thanks a lot 8ace