Go Back   The AK Files Forums > Rifle Forums > AK-47s

Notices

Reply
 
Thread Tools
Old 02-23-2017, 11:52 AM   #141
Mel64D
Garage Goober
Silver Contributor
 
Mel64D's Avatar
 
AKaholic #: 178054
Join Date: Dec 2014
Location: DFW Texas
Posts: 2,713
Default



Keep an eye out for fractures where the cam lug is digging into the right side of the trunnion.

__________________
Garage Goober

Last edited by Mel64D; 02-23-2017 at 11:59 AM.
Mel64D is online now   Reply With Quote
Old 02-23-2017, 11:56 AM   #142
Bakwa
Member
 
Bakwa's Avatar
 
AKaholic #: 190595
Join Date: Dec 2016
Location: The Swamp, FL
Posts: 303
Default

Quote:
Originally Posted by Mel64D View Post
Exactly what I was pointing out. One day I'll learn how to mark on photos like this. Thanks.

Also, as stated before, I believe Zeke's is doing the same thing. Something of note for sure.
__________________
Ounces equal pounds, pounds equal pain.
Bakwa is online now   Reply With Quote
Old 02-23-2017, 11:58 AM   #143
mengra1
Senior Member
 
mengra1's Avatar
 
AKaholic #: 184774
Join Date: Feb 2016
Location: Missouri
Posts: 866
Default

Mel in your second photo looks like wear on the front of the trunnion nearest the receiver rail
__________________
No worries mate. I have two PSAK47 gen1s in my safe....lol. I wake up at night, I can hear their cast trunnions failing.... --64890
mengra1 is online now   Reply With Quote
Old 02-23-2017, 12:07 PM   #144
Mel64D
Garage Goober
Silver Contributor
 
Mel64D's Avatar
 
AKaholic #: 178054
Join Date: Dec 2014
Location: DFW Texas
Posts: 2,713
Default

Quote:
Originally Posted by mengra1 View Post
Mel in your second photo looks like wear on the front of the trunnion nearest the receiver rail
Yes, the bolt is hitting the main locking lug as it travels from the rail to the trunnion. Not all that uncommon really. Just that it should only wear itself in and not continue to deform. But that lug is receiving three points of stress or pressure. It gets hit from the bolt lug after it slide from the rail to the trunnion. Then the cam lug rotates all the way over (not uncommon) and hits the top right side of the trunnion. Then the round goes off and all the pressure is applied to the main lug while unlocking.


...and to mark on others pics....right click, save picture as, then open in paint - edit, then save and upload as your own.
__________________
Garage Goober
Mel64D is online now   Reply With Quote
Old 02-23-2017, 12:15 PM   #145
Mel64D
Garage Goober
Silver Contributor
 
Mel64D's Avatar
 
AKaholic #: 178054
Join Date: Dec 2014
Location: DFW Texas
Posts: 2,713
Default

NOT A RILEY DEFENSE TRUNNION



Notice where the break started on the right side.



Edit: this was not a cast trunnion, just heat treated to hard. It broke while firing.


NOT A RILEY DEFENSE TRUNNION
__________________
Garage Goober

Last edited by Mel64D; Yesterday at 10:40 PM.
Mel64D is online now   Reply With Quote
Old 02-23-2017, 12:43 PM   #146
mengra1
Senior Member
 
mengra1's Avatar
 
AKaholic #: 184774
Join Date: Feb 2016
Location: Missouri
Posts: 866
Default

Quote:
Originally Posted by Mel64D View Post
Notice where the break started on the right side.



Edit: this was not a cast trunnion, just heat treated to hard. It broke while firing.
Holy shit... Hopefully the receiver and cover didn't blow out. Injured?
__________________
No worries mate. I have two PSAK47 gen1s in my safe....lol. I wake up at night, I can hear their cast trunnions failing.... --64890
mengra1 is online now   Reply With Quote
Old 02-23-2017, 12:48 PM   #147
Bakwa
Member
 
Bakwa's Avatar
 
AKaholic #: 190595
Join Date: Dec 2016
Location: The Swamp, FL
Posts: 303
Default

Quote:
Originally Posted by Mel64D View Post
Notice where the break started on the right side.



Edit: this was not a cast trunnion, just heat treated to hard. It broke while firing.
Very good to know. I'll be keeping a very close eye on this one.

Quote:
Originally Posted by Mel64D View Post
...and to mark on others pics....right click, save picture as, then open in paint - edit, then save and upload as your own.
Also, thanks for the tip.
__________________
Ounces equal pounds, pounds equal pain.
Bakwa is online now   Reply With Quote
Old 02-23-2017, 01:39 PM   #148
Mel64D
Garage Goober
Silver Contributor
 
Mel64D's Avatar
 
AKaholic #: 178054
Join Date: Dec 2014
Location: DFW Texas
Posts: 2,713
Default

Quote:
Originally Posted by mengra1 View Post
Holy shit... Hopefully the receiver and cover didn't blow out. Injured?
Not that I was told. Not my trunnion, I just tested it for the guy.
__________________
Garage Goober
Mel64D is online now   Reply With Quote
Old 02-23-2017, 01:43 PM   #149
mengra1
Senior Member
 
mengra1's Avatar
 
AKaholic #: 184774
Join Date: Feb 2016
Location: Missouri
Posts: 866
Default

Quote:
Originally Posted by Mel64D View Post
Not that I was told. Not my trunnion, I just tested it for the guy.
What's the prognosis? Improper heat treat or ammo?
__________________
No worries mate. I have two PSAK47 gen1s in my safe....lol. I wake up at night, I can hear their cast trunnions failing.... --64890
mengra1 is online now   Reply With Quote
Old 02-23-2017, 01:50 PM   #150
Mel64D
Garage Goober
Silver Contributor
 
Mel64D's Avatar
 
AKaholic #: 178054
Join Date: Dec 2014
Location: DFW Texas
Posts: 2,713
Default

Quote:
Originally Posted by mengra1 View Post
What's the prognosis? Improper heat treat or ammo?
It was to hard and blew apart is what I was told/remember.

The other was much softer. Don't remember the numbers off the top of my head.

They guy had them sent to someone else first for hardness testing. He wanted my numbers to back up the others.
__________________
Garage Goober
Mel64D is online now   Reply With Quote
Old 02-23-2017, 08:19 PM   #151
Mattylight30
Curio & Relic
 
Mattylight30's Avatar
 
AKaholic #: 172152
Join Date: Nov 2013
Location: Springfield, IL
Posts: 3,456
Default

Quote:
Originally Posted by Mel64D View Post
Notice where the break started on the right side.



Edit: this was not a cast trunnion, just heat treated to hard. It broke while firing.
Whats the origin of this trunnion?

Who made it?
Mattylight30 is online now   Reply With Quote
Old 02-23-2017, 11:53 PM   #152
vipergts333
Zeke Shoots
 
vipergts333's Avatar
 
AKaholic #: 155579
Join Date: Jan 2011
Location: moline il
Posts: 266
Default

Quote:
Originally Posted by Bakwa View Post
Exactly what I was pointing out. One day I'll learn how to mark on photos like this. Thanks.

Also, as stated before, I believe Zeke's is doing the same thing. Something of note for sure.
This is why I am waiting on ammo lol. I think If they trim the lug on the bolt a bit, this will be a non issue.
vipergts333 is online now   Reply With Quote
Old 02-23-2017, 11:57 PM   #153
Mel64D
Garage Goober
Silver Contributor
 
Mel64D's Avatar
 
AKaholic #: 178054
Join Date: Dec 2014
Location: DFW Texas
Posts: 2,713
Default

Quote:
Originally Posted by Mattylight30 View Post
Whats the origin of this trunnion?

Who made it?
To be honest I'm not sure I am allowed to say.

But there is a pic here on the files of one.
__________________
Garage Goober
Mel64D is online now   Reply With Quote
Old Yesterday, 12:13 AM   #154
boomerdog
Coming 'round the mountain
 
boomerdog's Avatar
 
AKaholic #: 76368
Join Date: Mar 2010
Location: Up a holler, Wv
Posts: 4,290
Default

Quote:
Originally Posted by vipergts333 View Post
This is why I am waiting on ammo lol. I think If they trim the lug on the bolt a bit, this will be a non issue.
What??? Why trim the bolt? A non issue??? REALLY???

I'm not even qualified to be an ametuer with AK's yet but this kind of crap needs called out.
__________________
The AK is a platform, because you can stand on it.
boomerdog is online now   Reply With Quote
Old Yesterday, 12:58 AM   #155
Mattylight30
Curio & Relic
 
Mattylight30's Avatar
 
AKaholic #: 172152
Join Date: Nov 2013
Location: Springfield, IL
Posts: 3,456
Default

Quote:
Originally Posted by Mel64D View Post
To be honest I'm not sure I am allowed to say.

But there is a pic here on the files of one.
Why wouldn't you be?
Mattylight30 is online now   Reply With Quote
Old Yesterday, 01:07 AM   #156
boutcha
Curio & Relic
Bronze Contributor
 
boutcha's Avatar
 
AKaholic #: 172420
Join Date: Dec 2013
Location: Tour Bus
Posts: 4,884
Default

Quote:
Originally Posted by Mel64D View Post
To be honest I'm not sure I am allowed to say.

But there is a pic here on the files of one.
Link?
__________________
boutcha

I have for sale:
NOS 1960 Polish Carrier
New Take Off Norinco FCG
New Take off Arsenal FCG
boutcha is online now   Reply With Quote
Old Yesterday, 02:31 AM   #157
deadduck357
Veteran Member
 
AKaholic #: 14612
Join Date: Aug 2008
Location: Tx
Posts: 1,186
Default

Quote:
Originally Posted by Mel64D View Post
Notice where the break started on the right side.



Edit: this was not a cast trunnion, just heat treated to hard. It broke while firing.
Not really sure why a pic like this has to be added to a thread that has no relation. If someone wanted to know something about this Riley Defense and didn't want to read through 5 pages and just jumps ahead and sees this - HOLY CRAP IM OUT , FCK RILEY THEY BLOW TRUNNIONS. No disrespect Mel.

Heck I haven't read this thread in a couple days and I jumped to the end - HOLY CRAP - oh ok not Riley??? Just saying.
deadduck357 is offline   Reply With Quote
Old Yesterday, 04:42 AM   #158
Mattylight30
Curio & Relic
 
Mattylight30's Avatar
 
AKaholic #: 172152
Join Date: Nov 2013
Location: Springfield, IL
Posts: 3,456
Default

Quote:
Originally Posted by deadduck357 View Post
Not really sure why a pic like this has to be added to a thread that has no relation. If someone wanted to know something about this Riley Defense and didn't want to read through 5 pages and just jumps ahead and sees this - HOLY CRAP IM OUT , FCK RILEY THEY BLOW TRUNNIONS. No disrespect Mel.

Heck I haven't read this thread in a couple days and I jumped to the end - HOLY CRAP - oh ok not Riley??? Just saying.
He's making the point that the trunnion failed at the same point where the RD trunnion is having uncommon wear.
Mattylight30 is online now   Reply With Quote
Old Yesterday, 07:17 AM   #159
mengra1
Senior Member
 
mengra1's Avatar
 
AKaholic #: 184774
Join Date: Feb 2016
Location: Missouri
Posts: 866
Default

Quote:
Originally Posted by Mattylight30 View Post
Why wouldn't you be?
Ill bet its a WBP forged trunnion. They just switched from cast fronts to forged. Atlantic touted the new forgings
__________________
No worries mate. I have two PSAK47 gen1s in my safe....lol. I wake up at night, I can hear their cast trunnions failing.... --64890
mengra1 is online now   Reply With Quote
Old Yesterday, 08:35 AM   #160
vipergts333
Zeke Shoots
 
vipergts333's Avatar
 
AKaholic #: 155579
Join Date: Jan 2011
Location: moline il
Posts: 266
Default

Quote:
Originally Posted by boomerdog View Post
What??? Why trim the bolt? A non issue??? REALLY???

I'm not even qualified to be an ametuer with AK's yet but this kind of crap needs called out.
When building a new rifle. It is very common to trim the parts to fit properly. Go into the gunsmith section and take a look at what some of us have had to go through with our kit builds. Virgin kits especially.
vipergts333 is online now   Reply With Quote
Old Yesterday, 08:55 AM   #161
Mel64D
Garage Goober
Silver Contributor
 
Mel64D's Avatar
 
AKaholic #: 178054
Join Date: Dec 2014
Location: DFW Texas
Posts: 2,713
Default

Quote:
Originally Posted by deadduck357 View Post
Not really sure why a pic like this has to be added to a thread that has no relation. If someone wanted to know something about this Riley Defense and didn't want to read through 5 pages and just jumps ahead and sees this - HOLY CRAP IM OUT , FCK RILEY THEY BLOW TRUNNIONS. No disrespect Mel.

Heck I haven't read this thread in a couple days and I jumped to the end - HOLY CRAP - oh ok not Riley??? Just saying.
None taken, I understand what it is you're stating.

As Mattylight30 said, I am showing where a section broke on another trunnion. This does not mean that the RD trunnion will suffer the same fate. Just to watch this area for stress fractures.

But the RD trunnion looks as if the mark I am showing is just a dent/ding. This could mean that the metal is not to hard as was the AMT trunnion I showed that is broke.

Note: You guys got your answer about the mystery trunnion. So if I wasn't supposed to say who the trunnion was made by I am sorry; but was also not asked to keep quiet either.
__________________
Garage Goober

Last edited by Mel64D; Yesterday at 09:01 AM.
Mel64D is online now   Reply With Quote
Old Yesterday, 08:57 AM   #162
Mattylight30
Curio & Relic
 
Mattylight30's Avatar
 
AKaholic #: 172152
Join Date: Nov 2013
Location: Springfield, IL
Posts: 3,456
Default

Quote:
Originally Posted by mengra1 View Post
Ill bet its a WBP forged trunnion. They just switched from cast fronts to forged. Atlantic touted the new forgings
I hope not, I get my kit on Saturday.

When and where?

^ +1

Last edited by Mattylight30; Yesterday at 09:03 AM.
Mattylight30 is online now   Reply With Quote
Old Yesterday, 09:02 AM   #163
mengra1
Senior Member
 
mengra1's Avatar
 
AKaholic #: 184774
Join Date: Feb 2016
Location: Missouri
Posts: 866
Default

Quote:
Originally Posted by Mattylight30 View Post
I hope not, I get my kit on Saturday.

When and where?
hang on ill throw you the links. I dug through links from two threads
__________________
No worries mate. I have two PSAK47 gen1s in my safe....lol. I wake up at night, I can hear their cast trunnions failing.... --64890
mengra1 is online now   Reply With Quote
Old Yesterday, 09:11 AM   #164
mengra1
Senior Member
 
mengra1's Avatar
 
AKaholic #: 184774
Join Date: Feb 2016
Location: Missouri
Posts: 866
Default

Quote:
Originally Posted by Mattylight30 View Post
I hope not, I get my kit on Saturday.

When and where?

^ +1
post 47, atlantic who builds them since wbp cant import complete cuz atf...acknowledges the switch

http://www.akfiles.com/forums/showth...=293390&page=2


read post 11, then 7 by atlantic. they say the casts are holding ok, but are switching and increasing cost (forged)

http://www.akfiles.com/forums/showthread.php?t=264327
__________________
No worries mate. I have two PSAK47 gen1s in my safe....lol. I wake up at night, I can hear their cast trunnions failing.... --64890

Last edited by mengra1; Yesterday at 09:18 AM.
mengra1 is online now   Reply With Quote
Old Yesterday, 12:14 PM   #165
Atlantic Firearms
Curio & Relic
Vendor
 
Atlantic Firearms's Avatar
 
AKaholic #: 4032
Join Date: Jun 2005
Posts: 3,249
Default

We switched to Forged WBP Trunions approx 8 months ago and this is nothing new .
__________________
Atlantic Firearms,llc
www.atlanticfirearms.com
410 352 5183
Atlantic Firearms is online now   Reply With Quote
Old Yesterday, 12:53 PM   #166
mengra1
Senior Member
 
mengra1's Avatar
 
AKaholic #: 184774
Join Date: Feb 2016
Location: Missouri
Posts: 866
Default

I was filling Mattylight30 in on that fact
__________________
No worries mate. I have two PSAK47 gen1s in my safe....lol. I wake up at night, I can hear their cast trunnions failing.... --64890
mengra1 is online now   Reply With Quote
Old Yesterday, 03:14 PM   #167
boomerdog
Coming 'round the mountain
 
boomerdog's Avatar
 
AKaholic #: 76368
Join Date: Mar 2010
Location: Up a holler, Wv
Posts: 4,290
Default

Quote:
Originally Posted by vipergts333 View Post
When building a new rifle. It is very common to trim the parts to fit properly. Go into the gunsmith section and take a look at what some of us have had to go through with our kit builds. Virgin kits especially.
Very true, but these are production guns. The guys that buy these rifles are likely not builders or understand how to fix these issues. I'm not slamming the rifle, just throwing it out there.
__________________
The AK is a platform, because you can stand on it.
boomerdog is online now   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 18 (0 members and 18 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


All times are GMT -4. The time now is 02:55 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
©2015 The AK FIles