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Posted: 12/1/2013 3:04:06 PM EDT
[Last Edit: 12/1/2013 3:41:21 PM EDT by Paul]
Link Posted: 12/1/2013 3:13:48 PM EDT
Wow

So when does class start?
Link Posted: 12/1/2013 9:40:06 PM EDT
Damn bubba, I do mine on a Craftsman drill press. It's a pita but it gets the job done.
Link Posted: 12/2/2013 3:23:41 PM EDT
I need to know more about your set up!  That comes out very clean.



How much?

What kind of press is that?

Where do I get one?
Link Posted: 12/2/2013 8:01:13 PM EDT
Link Posted: 12/3/2013 2:12:33 PM EDT
I think I may have been the last person to rent 80% Arms CNC machine. It was the last Sunday of April this year, a week or so later I read that they had to shut down the next day per ATF..

They sure do make a fine 80% lower.

Link Posted: 12/3/2013 5:33:11 PM EDT
Link Posted: 12/4/2013 1:31:34 PM EDT
O man I want a pistol so bad.



Very nice job OP.
Link Posted: 12/4/2013 5:43:04 PM EDT
Very cool. You have to use a ton of the Dura Coat flattener to make it come
out with no sheen. Learned the hard way.
Link Posted: 12/4/2013 7:25:36 PM EDT
Link Posted: 12/5/2013 2:54:22 PM EDT
I didn't see the air spring kit on Micro-Mark's site.  Did you get the one listed on littlemachineshop.com?  

How much difference does it make compared to the torsion-spring setup?  Easy to install?

I really like that setup.  Listed table travel states 8.5" x 4" x 7" in X, Y, & Z directions.  Did you use the 12" DRO kits for X & Z and a 6" for Y axis?

Glad I didn't bite on that deal Harbor Freight had going...
Link Posted: 12/5/2013 6:05:20 PM EDT
[Last Edit: 12/5/2013 6:11:31 PM EDT by Paul]
Link Posted: 12/5/2013 7:33:05 PM EDT
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Originally Posted By Paul:


Yes the air spring is from LMS and it took about 1.5 hours to install - most of that was finding a pair of metric taps that could bite (Harbor Freight's sucked, Sears cut through the iron like butter).

Yes - two 12" and one 6" DRO. The X axis 12" had to be cut down to 11" or so to fit the back of the table. Easy job but you'll need something to cut the stainless steel if you get the high-accuracy ones like I have. I spend ten minutes with a hack saw, five more with a dremel, five minutes with a brand new metal band saw blade before breaking out the chop saw with an abrasive blade.

I have R8 taper collets now and bought a 4" long 3/8" end mill to give me all the clearance in the world. I had a 2.5" long one and struggled. I'm now looking for a 1/4" end mill of about the same length that doesn't cost $50 with shipping.

Found them for $25 at Shamrock Tools which is kind of local to me ... right next to Frys Electronics in Anaheim. I need to go by and load up on stuff at both places ... big boy super store!
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Originally Posted By Paul:
Originally Posted By BroadSideOfADime:
I didn't see the air spring kit on Micro-Mark's site.  Did you get the one listed on littlemachineshop.com?  

How much difference does it make compared to the torsion-spring setup?  Easy to install?

I really like that setup.  Listed table travel states 8.5" x 4" x 7" in X, Y, & Z directions.  Did you use the 12" DRO kits for X & Z and a 6" for Y axis?

Glad I didn't bite on that deal Harbor Freight had going...


Yes the air spring is from LMS and it took about 1.5 hours to install - most of that was finding a pair of metric taps that could bite (Harbor Freight's sucked, Sears cut through the iron like butter).

Yes - two 12" and one 6" DRO. The X axis 12" had to be cut down to 11" or so to fit the back of the table. Easy job but you'll need something to cut the stainless steel if you get the high-accuracy ones like I have. I spend ten minutes with a hack saw, five more with a dremel, five minutes with a brand new metal band saw blade before breaking out the chop saw with an abrasive blade.

I have R8 taper collets now and bought a 4" long 3/8" end mill to give me all the clearance in the world. I had a 2.5" long one and struggled. I'm now looking for a 1/4" end mill of about the same length that doesn't cost $50 with shipping.

Found them for $25 at Shamrock Tools which is kind of local to me ... right next to Frys Electronics in Anaheim. I need to go by and load up on stuff at both places ... big boy super store!


With the 4" end mills, do you run the risk of not having enough shank contact with the jig and accidentally wind up milling the jig?

On the other hand, I suppose the jig becomes rather unnecessary when you have the experience of a seasoned machinist at your disposal.
Link Posted: 12/6/2013 7:10:59 PM EDT
[Last Edit: 12/7/2013 4:46:32 AM EDT by Paul]
Link Posted: 1/1/2014 11:30:19 AM EDT
Link Posted: 1/1/2014 12:21:57 PM EDT
I swear just when  I think I have enough people like Paul make we want more.

I fucking love this place.
Link Posted: 1/1/2014 1:29:41 PM EDT
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Originally Posted By Paul:


Uggh. I wish someone had told me that ... I figure 200 grit sandpaper will put a dent in that sheen. I do like the color.
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Originally Posted By Paul:
Originally Posted By KZ45:
Very cool. You have to use a ton of the Dura Coat flattener to make it come
out with no sheen. Learned the hard way.


Uggh. I wish someone had told me that ... I figure 200 grit sandpaper will put a dent in that sheen. I do like the color.


in the next few months I will get my blast cabinet going again.  if you can wait till then, you are welcome to blast the shine off instead of sanding it.  Low pressure and fine, sharp media should help in a uniform flattening effect.


Link Posted: 1/1/2014 2:49:43 PM EDT
Link Posted: 1/5/2014 2:47:23 AM EDT
Is there anyplace in the Temecula area to finish an 80%lower?
Link Posted: 1/5/2014 6:48:00 AM EDT
Link Posted: 1/5/2014 10:24:51 PM EDT

Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Paul:





In your garage?



The BATF sent out letters to those companies that set up to provide CNC services for a fee telling them to stop completing the 80% lowers.
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Originally Posted By Paul:



Originally Posted By Riply21:

Is there anyplace in the Temecula area to finish an 80%lower?


In your garage?



The BATF sent out letters to those companies that set up to provide CNC services for a fee telling them to stop completing the 80% lowers.
looks like its time to finally set up the drill press. Lock the knees and lift with the back right?





 
Link Posted: 1/9/2014 6:58:40 PM EDT
Look up Ano-tech in Clovis, CA.  Pro 2nd Amendment folks, they ano lowers and have different colors.    RTP
Link Posted: 1/10/2014 6:15:16 PM EDT
Who sells 80% lowers?  Does anyone sell the ones that have the trigger area opened up but require drilling and tapping for the receiver extension?
Link Posted: 1/10/2014 6:49:00 PM EDT
[Last Edit: 1/10/2014 7:10:59 PM EDT by Paul]
Link Posted: 1/10/2014 6:55:47 PM EDT
Link Posted: 1/10/2014 6:58:15 PM EDT
Link Posted: 1/10/2014 7:01:36 PM EDT
[Last Edit: 1/10/2014 7:13:20 PM EDT by Paul]
Link Posted: 1/10/2014 10:58:12 PM EDT
How did those polymer receivers turn out?
Link Posted: 1/11/2014 5:57:09 AM EDT
Link Posted: 1/11/2014 6:00:58 AM EDT
Link Posted: 1/11/2014 6:30:26 AM EDT
Do they seem pretty sturdy? I'm considering one of them for a lightweight build.
Link Posted: 1/11/2014 8:16:04 AM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Trollslayer:
Who sells 80% lowers?
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Ammo Bros. had them last time I was in their Ontario store.
Link Posted: 1/11/2014 9:22:38 AM EDT
I was looking over the 80percentarms  web site.  It seems that the receivers are fairly expensive and the jigs and tooling adds to the cost (doubles it).  

Why would someone want to buy one of these rather than buy a finished receiver?  Is it a hobby?  Is it to avoid CADOJ and BATFE?  Or is it for people who would be disallowed by NICS?


For me, it looks like it would be fun as a hobbyist activity.  Has anyone machined both a 6061 and a 7075?  How do they compare?  Was the 7075 more difficult?
Link Posted: 1/11/2014 4:40:37 PM EDT
yes, contact them by phone or email.  They told us we could UPS them to the shop.  We are down in Bakersfield, not too far a drive.  My partner has customers visit in the area.  They do good work.
Link Posted: 1/11/2014 5:46:59 PM EDT
Link Posted: 1/11/2014 6:03:34 PM EDT
Link Posted: 1/11/2014 9:00:08 PM EDT
Link Posted: 1/12/2014 8:52:45 AM EDT
Link Posted: 1/12/2014 2:10:01 PM EDT
Do not mess with sleeping dragons for you are crunchy and taste good with ketchup.
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