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Posted: 7/9/2005 2:35:58 PM EDT
| Is Global makeing any recievers with normal shaped dimples yet or are they still useing that wiered shaped one?.... |
| I bought two of the new Global receivers a few days ago. They are going to turn out well. The entire receiver is heat treated and hardened. I have ruined a lot of drill bits trying to get through the damn thing for trunnion installation. What drill bits do you guys think I should get? |
The cobalt bits work best. I found that when drilling use a slow speed. Too fast and the bit will heat up and wear quickly. |
Well I gotta say, modifying that receiver for the underfolder is loads of fun. That hard ass metal isn't very forgiving when you have to open six bid ol' honkin' holes in it for the stock.  But I won and my PMKMS underfolder is installed and locks up nice and tight. Much more so than my Yugo. As for the dimpling. Ihave to admit on that receiver I too gave up some time back and use a countersinking bit. Now I will also say that you get a bit of mileage trying to dimple it in if you countersink first. but you have to start with your rivet holes a bit size small for it too work. Drill them small, then countersink. then use a punch to dimple the thinner metal (because you shear it away with the countersink bit) That's what I was doing for awhile anyhow and it worked well, you could at least get it done that way. Then I quit and now JUST countersink it like Jim. Works just fine and alot less work. |
I found a way to get the swell necks flush on the GT 1mm. I tried punches with BFH with little success. A little trial and error with the 12 ton came up with a solution. I put the swell necks in both sides and place a rivet block on each swell neck. Then into the 12 ton and press until they are flush. The receiver now has nice dimples that exactly match the rivets. I leave the same rivets in after pressing and finish up with the squeezer. I've done this on several builds and the results have been great each time. |
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