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All Springer/NP/PCP Air Gun Discussion General > 3D printing and files

.22 Marauder 32 mm OD x 140 mm LDCs - Direct shroud mount; and 1/2-20

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rualert:
      Thank you kindly, sir, I will get them printed and provide feedback as soon as I can test them out. I appreciate your time and assistance, sir, it's great to find others who think alike.


Casey

P.S. I have had great success with your designs and my printer,slicer, and settings seem to be right on point thus far. Again I will provide feedback as soon as I can.

subscriber:
Casey,

In case you find the threads on the above version of LDCs too tight, you might try Version 2.  Version 2 has more relief in the threads, intended to screw on easier.

If you have not yet started printing the first version, I might suggest you try version 2, first.

ZIP files contains version 2 STLs for both taper base and cylindrical LDC versions.

Image below is of superimposed thread profiles, for V1 and V2; to show where material has been removed from thread-form:

rualert:
      I will try v2 of the tapered extension. I have however already printed and tried v1 of both. I forgot about the pull-off fill cover, so the tapered version is best for those who do not wish to unscrew their extension to refill. That said both screw on smoothly and tighten as expected. I used .16mm and .12mm print modes to check and see if I needed the additional quality/precision of the .16mm print level. The .12mm is fine and saves a bit of time, I may try .2mm to speed things up a bit more. Both versions of the extension, tapered and straight quell the last bit of pop exceptionally well for a short 4-inch extension. I am more than pleased with the results and would recommend these to anyone wanting just a bit more quiet from their Marauder Pistols/Carbine. Perhaps we should create a new post to share with more of our air-gunning brothers and sisters.
Picture of the tapered model:


Thank you again, and I'll get a v2 printed to test for you as well.
Casey

rualert:
      A couple more things. I will perform some actual DB testing with and without the extension to get a rough number for those interested. I will also shoot a couple of groups with and without to see if any difference is visible in group size and POI. More to come.

Casey

subscriber:
Thanks for the feedback, Casey

I am glad that the fuller thread-form versions works for you.   I expect that then the V2 might screw on with some play at your print settings.  Even so, they might help someone struggling with Version1.

Your results make me wonder about the print settings John is using in this thread:
https://www.gatewaytoairguns.org/GTA/index.php?topic=209016.msg156539630#msg156539630

Feel free to start a thread in the PCP gate about your PROD, posting your results and impressions of this LDC.  Post a link to the section of this thread where the PROD LDC project starts:
https://www.gatewaytoairguns.org/GTA/index.php?topic=211473.msg156539885#msg156539885

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