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Extractors


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#1 zebradog

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Posted 28 March 2012 - 03:29 PM

Hey guys, just started building my RG-G gun. My dad and I are building it together, only he's making his in AZ ans me in WA. He's been machining since I was a kid, and I've recently picked it up as a hobby in the last couple years. This is my first REAL project where tight tolerances have to be met, and intricate machining is done.

So far I've really struggled with the recoil pins. I've broken 5 end mills and ruined a slitting saw. I'm using a keyway cutter now, and I just discovered that this entire time my vise had a lot of slop in it, causing a lot of deflection which ruined several parts. After I fixed the vise, I think it's going to go smooth.

Back to my original post, we are going to start making the extractors next. How did you guys make those? I bought keystock instead of flat bar, but I'm wondering if the flat bar is a better way to go. Thoughts and ideas are appreciated.
Thanks
JD

#2 bruski

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Posted 28 March 2012 - 05:37 PM

Welcome aboard. If you are going to machine all ten extractors at one time, then you will need a good precision vise toi hold them properly. Check out these pictures for an idea on how to do this. viewtopic.php?f=7&t=120&start=10 Hope this helps you some.
bruski

#3 my65pan

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Posted 30 March 2012 - 02:12 AM

I machined my extractors from one piece of flat bar and then parted them off with a .020 slitting saw. Don't forget to make a few extras including one for the stick magazine if you are going that route.

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#4 Cutter

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Posted 03 April 2012 - 03:16 PM

This modification works well

 

Attached File  Extractor 3-id=868.JPG   25.14KB   4 downloads

 

Attached File  Extractor 2-id=867.jpg   46.9KB   2 downloads

 

Attached File  Extractor 1-id=866.jpg   25.6KB   1 downloads

 

Attached File  Extractor 3-id=868.JPG   25.14KB   4 downloads

Attached Files



#5 Cutter

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Posted 03 April 2012 - 03:19 PM

And here are drawings

 

Attached File  Extractor 4-id=871.jpg   108.77KB   1 downloads

 

Attached File  Extractor 5-id=870.jpg   82.68KB   1 downloads


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#6 Steve McKuhen

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Posted 04 April 2012 - 04:31 AM

Hardened?

#7 Cutter

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Posted 04 April 2012 - 02:53 PM

Steve,
If a gun is for display only I see no need.
I recommend hardening for a shooter.
These are made from .094 low carbon precision flat ground stock.
My Extractors are case hardened ( .002/.004 )

#8 zbeesdad

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Posted 04 April 2012 - 02:58 PM

Hello all! I'm zebra dogs dad; he's shaming me into building a gun along side of him so, we'll see how it goes. Amazing work from everyone on the forum! I really like the updated extractor design but, since I don't have CNC capability, I'm going to try the method used for the original design. I'll keep you posted as things progress. I am curious about the firing pins that some members are using. The pins that are suggested come already hardened and will require some slight modifications to the heads. I am thinking of making a form of tool post grinder so the head length and final diameter can be accurately achieved unless someone has another idea. Any advice is greatly appreciated. Again, the pictures, the work, and the advice given are great! Thanks!

#9 Sparky_NY

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Posted 04 April 2012 - 05:38 PM

The quality of your work always amazes me. In the first pic, with all the extractors in a row, what is holding them like that for machining? Also, what is the tang, on the end opposite the shell rim for? I like the design.

George

#10 Cutter

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Posted 04 April 2012 - 09:26 PM

Thanks George,
Here's a picture after the first operation, which was laying flat in a vise.
Also a picture after the second operation standing on edge with special cut Aluminum jaws.
There's a .010 thk. tab on the front radius.
After that I break them out and deburr them.
The tang is a stop.

Jerry

 

Attached File  EXT-002S-id=874.JPG   45.08KB   4 downloads

 

Attached File  Stop-003S-id=873.JPG   20.07KB   4 downloads



#11 dburn

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Posted 04 May 2012 - 11:03 PM

The extractors look great but where is the firing pin hole?

#12 Cutter

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Posted 05 May 2012 - 10:56 PM

Dave,
The sketches are for Extractor and slot only.
Jerry

#13 dburn

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Posted 06 May 2012 - 02:34 PM

WHERE IS THE FIRING PIN HOLE?

#14 Cutter

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Posted 06 May 2012 - 10:14 PM

Looking at the front of the Bolt.
The hole for the firing pin is located at 150 degrees
on a .105 radius,

 

Attached File  Bolts-id=889.bmp   1.82MB   83 downloads



#15 DonV

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Posted 16 December 2012 - 03:58 PM

I'm about to start making extractors. I'm planning on making a jig to hold about 12 pieces of 1/8" square W-1 tool steel, with a hold-down clamp bar across the unmilled 0.125 center section. Then I saw the note about the chamfer on the bottom of the center (unmilled) section. What's that for? I can't see any reason for it, except maybe to miss the firing pins if they were placed in the original 45 degree position, and then it looks like the chamfer is on the wrong side. What am I missing?

Don

#16 Cutter

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Posted 19 December 2012 - 10:26 PM

Don,
My drawing shows the correct view, but you are correct the chamfer is no longer required.

Good Luck

#17 Cutter

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Posted 23 January 2013 - 04:55 PM

I've used the Ruger method of attaching the extractors,
very simple and works great

 

Attached File  MVC-005F-id=1124.JPG   67.77KB   5 downloads

 

Attached File  MVC-004F-id=1125.JPG   78.56KB   0 downloads

 

Attached File  MVC-006F-id=1123.JPG   68.03KB   3 downloads

 

Attached File  MVC-001F-id=1122.JPG   77.71KB   0 downloads



#18 bruski

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Posted 23 January 2013 - 11:38 PM

Cutter,
That is a great idea. No more pin holes and lost springs on the shop floor.
bruski

#19 Cutter

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Posted 24 January 2013 - 03:25 PM

Here's a .dxf file for anyone interested.
I cut the slot with a 1/16 by 5/8 key cutter.
The extractor made from O1 tool steel.
Lee Spring # CI 012BC 09M

Jerry

 

Attached File  Extractor.dxf   85.82KB   243 downloads



#20 Cutter

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Posted 04 March 2013 - 04:54 PM

Here's the fixture I used to machine the details in the bolts
for the new extractors.

 

Attached File  Fixture 1-id=1204.jpg   61.07KB   6 downloads

 

Attached File  Fixture 2-id=1205.jpg   49.53KB   5 downloads






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