Nevermind LOL

[Madmox]

You can totally fix it. Masking tape it over and fill the trigger slot with JB Weld then remill it. Correctly


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[spyde12]

The first one is allways a sacrifice to the 80% gods!

Ain't this the truth!!!

i've never tackled one of these....wondering what steps might have improved outcome?

IMHO, having a drill press to complete the holes is a life saver. It takes me about 10-15 minutes (lubricating the bit and making each adjustment).

Like another member suggested, set the drill stop a few mm shy. This accomplishes two things.
1. You don't drill too deep and/or through the lower.
Can be fixed with jb weld. Drill and mill.

2. You don't get dimples at the floor.
Can be fixed by making additional thin passes until it's smooth.

No kidding! Thinking I may hang it up somewhere near my computer to keep me humble

Hehehe...it'll be a good reminder of where you started. However, it's technically a firearm, so you'll actually need to lock that up from peering eyes.

Overall, you did good bro. Use the experience to perfect your techniques. PM me if you have any questions and I'll be more than happy to offer suggestions. Glad to see you got Tap Magic as well.

Also, don't feel too bad about trigger slot. One of my earlier projects looks worse, but then again, I used a different jig at the time.

Email 80PercentArms your review and you'll redeem a free lower

Welcome to the club!

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[ar15barrels]

Using my weak drill was a nightmare, it took an average of 25 minutes per hole and I mean like 25 rough minutes each freakin time.

Sounds like a dull drill bit.
With a properly sharpened drill bit, you should spend less than a minute a hole with a proper drill press and some cutting oil.

[geoint]

Ain't this the truth!!!

IMHO, having a drill press to complete the holes is a life saver. It takes me about 10-15 minutes (lubricating the bit and making each adjustment).

Like another member suggested, set the drill stop a few mm shy. This accomplishes two things.
1. You don't drill too deep and/or through the lower.
Can be fixed with jb weld. Drill and mill.

2. You don't get dimples at the floor.
Can be fixed by making additional thin passes until it's smooth.


Hehehe...it'll be a good reminder of where you started. However, it's technically a firearm, so you'll actually need to lock that up from peering eyes.

Overall, you did good bro. Use the experience to perfect your techniques. PM me if you have any questions and I'll be more than happy to offer suggestions. Glad to see you got Tap Magic as well.

Also, don't feel too bad about trigger slot. One of my earlier projects looks worse, but then again, I used a different jig at the time.

Email 80PercentArms your review and you'll redeem a free lower

Welcome to the club!

Sent from my SM-N900T using Tapatalk

now that is awesome. Will definitely be emailing them for my free baby lol.


And thanks for the suggestions above for how to salvage my lower. Remilling it and the drop in triggers sound like a ton of fun.

[geoint]

Sounds like a dull drill bit.
With a properly sharpened drill bit, you should spend less than a minute a hole with a proper drill press and some cutting oil.

http://www.calguns.net/calgunforum/showthread.php?t=1242525

Post # 13. My drill maxes out at 1500rpm. In the 80% Arms video, they suggest setting your drill to 2500rpm. My drill maxing out so much slower than theirs is probably why it took soooo much effort to get my holes drilled. As I said in the other thread I had about this, it is entirely my fault for not having the proper drill from the get go.

[ar15barrels]

My drill maxes out at 1500rpm. In the 80% Arms video, they suggest setting your drill to 2500rpm. My drill maxing out so much slower than theirs is probably why it took soooo much effort to get my holes drilled. As I said in the other thread I had about this, it is entirely my fault for not having the proper drill from the get go.

False.
A sharp drill bit does not need to run that fast.
You could have the drill going 500rpm and if it's sharp, you could form a nice chip and still get over an inch deep in way less than a minute.
Forming a good chip is all about tool sharpness, cutting fluid and cutting pressure.
The more HP you have, the thicker chip you can form.

If you are NOT forming a chip like this video, you are not pushing hard enough:

[Killer Bee]

^ yep!

sharp, cool, slow, and as much pressure as the drill motor can handle.. big ships is good, glitter sprinkles are bad.. if the cutting edges are sliding over the material and not cutting into it, the result is more friction and heat with low production..

but the caveat here is, fixed mount boring or drilling machines have feed stops to allow full pressure to the end where hand held tool holding requires a lot more finesse to stop at proper depth.. drill guides and stop collars may be of assistance here..

OP, looking good for a beginner, especially with the primitive tools you're using.. keep it up and your work will improve with each one you make..

[geoint]

ahh interesting. Thanks for the info ARbarrels

[spyde12]

Anytime someone like ar15barrels chimes in, it's free advice worth noting.

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[Junkie]

With a hand drill that wear on the jig is normal. A drill press will reduce it.

[strongpoint]

I had my cordless drill out this afternoon, so I took the time to check the specs; it tops out at 1,400 RPM. I was drilling out the holes from above in less than 30 seconds each, IIRC.

So press firmly and use a sharp bit, OP. Were you using the tooling set that 80% Arms sells?

i've never tackled one of these....wondering what steps might have improved outcome?

Work carefully, especially your first time through. Measure twice, cut once. Read the instructions carefully, and compare photos and diagrams to your actual work piece and jig/template setup -- small details are often significant.

Which reminds me, geoint -- did you have a finished lower around for comparison? I suspect not, because you would have seen right away that the one template wasn't positioned properly for the trigger slot.

[AlienHobo]

It should not take hours to drill out those holes, even with a dull bit. Was the drill turning the right direction?

[geoint]

I had my cordless drill out this afternoon, so I took the time to check the specs; it tops out at 1,400 RPM. I was drilling out the holes from above in less than 30 seconds each, IIRC.

So press firmly and use a sharp bit, OP. Were you using the tooling set that 80% Arms sells?




Work carefully, especially your first time through. Measure twice, cut once. Read the instructions carefully, and compare photos and diagrams to your actual work piece and jig/template setup -- small details are often significant.

Which reminds me, geoint -- did you have a finished lower around for comparison? I suspect not, because you would have seen right away that the one template wasn't positioned properly for the trigger slot.

I wasn't using the set that 80% sent. I ordered one but I already had a lot of bits and I was using my own. Will try theirs in my next attempt.

And yes, I have plenty of lowers here for comparison. Ill make sure not to make the same mistake again.


So question: Im going with the epoxy/remilling route as suggested above and installing a drop in trigger (CMC single stage). Do you guys think I should go with KNS anti rotation pins just for extra peace of mind, since the floor will not be quite up to standard?

[pklin1297]

Don't you just love that large routing plate with this jig?

Check your drill, and end mil bit lengths constantly to make sure they have not loosened and gotten longer in either the drill or router. A few times also I would find that when adjusting my end mill bit using the jig guide, that I had adjusted the bit long without realizing it because I was pushing the jig guide with the bit. Not sure if that made sense, but I milled one 80%'s main pocket deeper than needed because of this.

Looks like you've got plenty more chances to learn with all those 80% receivers... have fun!

[Calico1404]

I wasn't using the set that 80% sent. I ordered one but I already had a lot of bits and I was using my own. Will try theirs in my next attempt.

And yes, I have plenty of lowers here for comparison. Ill make sure not to make the same mistake again.


So question: Im going with the epoxy/remilling route as suggested above and installing a drop in trigger (CMC single stage). Do you guys think I should go with KNS anti rotation pins just for extra peace of mind, since the floor will not be quite up to standard?

A few bucks for you to rest easy sure.... And don't worry about the floor OP. with the drop in trigger you are "A" ok.

You should see my first hahaha.

Good shot and grabbing the extras, by number 3 you will feel like a pro.