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Author Topic: RGG Gatling  (Read 4300 times)

Offline John K

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RGG Gatling
« on: April 19, 2018, 07:07:30 PM »
New guy, first post.  Received my plans from Paul a week ago, got registered to the board, read/studied everything I could find on the subject and decided to build a non-firing version first. Hopefully, will be able to work out any bugs with aluminum first. Started building CAD models and making chips over the weekend. Finished 10 barrels and front & rear barrel plates.  If I can figure out how to post pics I will add them to this thread.
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Offline Cutter

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RGG Gatling
« Reply #1 on: April 19, 2018, 08:02:21 PM »
Welcome to the group John

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Offline John K

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RGG Gatling
« Reply #2 on: April 19, 2018, 08:05:45 PM »

Thanks, appreciate your help!  Pic posting... can we upload or do we need to host elsewhere?


 


Thanks,


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Offline Sparky_NY

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RGG Gatling
« Reply #3 on: April 19, 2018, 08:47:37 PM »

Welcome John !      Look forward to following your build. 


 


As for posting pics,  you can upload them right here    When you make a post, in the right corner is a tab \"more reply options\",  that will show a \"attach files\" area.


« Last Edit: April 19, 2018, 08:48:14 PM by Sparky_NY »
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Offline John K

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RGG Gatling
« Reply #4 on: April 19, 2018, 09:04:10 PM »

[attachment=10523:Gat1.jpg]


[attachment=10525:Gat3.jpg]


[attachment=10524:Gat2.jpg]


[attachment=10526:Gat4.jpg]


[attachment=10527:Gat5.jpg]


[attachment=10528:gat6.jpg]


[attachment=10529:gat7.jpg]


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Offline John K

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RGG Gatling
« Reply #5 on: April 19, 2018, 09:05:11 PM »

That worked - Thanks!


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Offline 50BMGBOB

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RGG Gatling
« Reply #6 on: April 19, 2018, 09:26:38 PM »
Looks good. I have been working on mine for years. Of course I had never owned a lathe or a mill before I bought the plans so I had a lot to learn and not much time to work on it. I am getting there and I\'m about half done. Keep up the post to encourage me to keep at it.
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Offline Sparky_NY

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RGG Gatling
« Reply #7 on: April 20, 2018, 07:01:50 AM »

Looks great John !     ( I think you should reconsider and just make it a firing version)   


« Last Edit: April 20, 2018, 07:04:10 AM by Sparky_NY »
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Offline John K

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RGG Gatling
« Reply #8 on: April 20, 2018, 01:26:06 PM »

Thanks Sparky!  Maybe... I would like a display tho.


 


Working on the Bolt Carrier.  The Ejector slot... My ciphering says the \"points\" on the flats are at 2.103\" diameter, and the .150\" depth is registered from there, so.. 1.803\" diameter for the slot?  Here is a pic of the model with that dimension.  I realize it is just clearance, but that groove looks like it could be a wonderful contributor to jams. 


 


[attachment=10531:Carrier-Block.jpg]


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Offline drhardin

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RGG Gatling
« Reply #9 on: April 20, 2018, 04:05:40 PM »

Looking real good. Is that a Tormach mill you\'re using?


 


I almost finished mine two years ago and then had some serious health issue. All better now so I am hoping to correct a major problem. Milled part of the barrel away for the extractor and when it fires it occasionally blows the bullet casing out. When that happens it jams the gun , bends the extractor and is a real mess. Will have to cut the barrels off and redo then and make the gun a little shorter.


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Offline John K

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RGG Gatling
« Reply #10 on: April 20, 2018, 06:30:01 PM »
It is; Tormach 1100 with 6\" super spacer 4th axis. Should be able to set your barrels back, depending on your thread relief cut, and rechambering. It is possible to pick up existing threads if you are single pointing in a lathe.
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Offline John K

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RGG Gatling
« Reply #11 on: April 20, 2018, 06:40:18 PM »
It is; Tormach 1100 with 6\" super spacer 4th axis. Using Inventor and Sprutcam.


Should be able to set your barrels back, depending on your thread relief cut, and rechambering. It is possible to pick up existing threads if you are single pointing in a lathe.
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Offline John K

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RGG Gatling
« Reply #12 on: April 20, 2018, 06:41:24 PM »
Strange, lost a post, retyped it and the first one appeared.  Sorry!
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Offline drhardin

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RGG Gatling
« Reply #13 on: April 20, 2018, 08:37:22 PM »

Sometimes it takes a while for the post to appear. Not sure if the Admin has to approve it or not. 


 


I think I will just cut the barrels off and make the gun .750 shorter. I have a 770 I picked up used a few years ago. Since I am not a machinist it took a while to get it fired up. I am currently using Dolphin because that is what I got with the 770. I want to learn Fusion one of these days. 


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Offline John K

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RGG Gatling
« Reply #14 on: April 20, 2018, 08:45:36 PM »
Really, really wish the 1100 had a 10k spindle like the 770.  Would help a lot with small tools like engravers.
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Offline John K

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RGG Gatling
« Reply #15 on: April 25, 2018, 07:44:40 PM »
Little more work last weekend.  Modeled the bolt carrier and a set of soft Jaws to hold the workpiece vertical.  Added a 3/16\" pin to index.  The idea is to mill one side and then flip to mill the other.  In this way, I didn\'t have to drill the full 3\", only about half.  Seemed to work fine.
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Offline drhardin

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RGG Gatling
« Reply #16 on: April 25, 2018, 08:55:10 PM »

Very nice!


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Offline bruski

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RGG Gatling
« Reply #17 on: April 26, 2018, 09:32:28 PM »

Great job John, you might want to consider using a different ejector method which uses a pin pressed in the bottom of each bolt carrier groove under the bolts. This does require machining a slot under each bolt though, but it\'s a positive ejection on the other hand. Check out this link on the forum. http://www.gatlinggunforum.com/forum/index.php?/topic/1287-38357-prototype/%C2%A0\'>http://www.gatlinggunforum.com/forum/index.php?/topic/1287-38357-prototype/ 


Bruski


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Offline John K

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RGG Gatling
« Reply #18 on: April 26, 2018, 10:46:25 PM »

bruski,


 


Thanks - like that method much better.  Slotting the bolts is doable.  


 


Would like to build a centerfire along those lines one day.  I cast and reload a lot of different calibers so I could feed it easily.


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Offline Cutter

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RGG Gatling
« Reply #19 on: April 30, 2018, 01:47:08 PM »


Great job John, you might want to consider using a different ejector method which uses a pin pressed in the bottom of each bolt carrier groove under the bolts. This does require machining a slot under each bolt though, but it\'s a positive ejection on the other hand. Check out this link on the forum. http://www.gatlinggunforum.com/forum/index.php?/topic/1287-38357-prototype/%C2%A0\'>http://www.gatlinggunforum.com/forum/index.php?/topic/1287-38357-prototype/ 


Bruski




Sounds a little scary for a rim-fire 
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