I need to know if you have a PINNED barreled chinese sks and if it has corresponding numbers stamped on the front left of the receiver AND on the left side of the barrel just front of the receiver.
Please report your findings and post pics if possible.
I'm a newbie; where do I look, and what am I looking for, to tell whether I have a pinned barrel?
(http://chinesesks.weebly.com/uploads/2/9/2/2/29221347/4821590.jpg)
Do you have a pinned barrel chinese?
I looked at one of mine and it does, small number 7 on both
Well that's interesting!
Anyone else?
The one in the pic above seemingly does not have them. :-\
I don't know if you could see it in the pic, mine are very lightly stamped and barely visible.
Only pinned Chinese I have is a stamped receiver........ no numbers on barrel or receiver ......
Here's a pinned barrel receiver on gonebroker. 4th photo has no indication of number stamps.
http://www.gunbroker.com/item/719919023
Top: SKSNR... very late production SKS
Bottom: 416 Public Security
(https://dl.dropboxusercontent.com/s/tet9v7elv130aw7/SAM_3015.JPG?dl=0)
(https://dl.dropboxusercontent.com/s/5f16b9d2iu8dl5z/SAM_3018.JPG?dl=0)
Now on pressing fitted parts... no index/witness mark would be needed, generally when pressing, you do not/can not/will not turn one component. pressing parts can require TONS of force, thats... TONS per square inch. I have personally used a 250ton(a press that can develop...a half a million PSI) press several times to press track pins from an excavator, and routinely use a 100 ton press to replace spring pin bushings.. One man can not over come tons of pressure with a simple handtool and leave no mark, much less many tons, you will not move it, the only movement with pressure will be linear with the motion of the press. It's a straight in-line force. One would have to line everything up first and then press. Instead of an index mark, the rear sight could have been installed on the barrel first and then the barrel set in a press jig to hold both in the correct orientation, or just to get the process going and then pressed together.
If by chance you started the process of pressing, made it in say 1/8 inch, stopped, decide oh, I needed to turn it a hair, and you did manage to move twist one of the components, you could gall up the mating surfaces or simply put tear the metal from both surfaces and make both parts unusable. Which ever is the softer material will most likely be damaged, if both parts are of equal hardness, both parts could suffer damage during a twisting operation. If one is lucky enough, you may get lucky and your safest bet if something is off is to stop, reverse the pressing process, press it back apart and start over.
Nice.. thanks GM. thumb1
My Skavor project is a pinned barrel, and it has no markings there.
Quote from: Power Surge on November 27, 2017, 05:52:44 PM
My Skavor project is a pinned barrel, and it has no markings there.
Awesome... Thanks ps.
Now...one thing became apparent, I noticed this while I took the above pictures and I just couldn't let it go ::) There seems to be differences in pinned receivers. Maybe a subject better for another thread, but since we are discussing the manufacturing processes after all.. I figured why not :) Seems there is differences...maybe factory differences, age differences, maybe different manufacturing or small changes in the processes and methods for pressing the barrels.
This is a 416 KFS 18million Public Security... Why the threaded hole drilled to the barrel? Had this thing for years...figured the hole was normal.. ::)
(https://dl.dropboxusercontent.com/s/lveywdcvf8dswix/SAM_3019.JPG?dl=0)
This is the SKSNR...Navy Arms... late...maybe last imported production, as in a 94 409xx serial... after seeing this, I wondered.....where is that hole?
(https://dl.dropboxusercontent.com/s/j1c66sdpd67uwg7/SAM_3016.JPG?dl=0)
Bubba made a duckbill-less adapter?
Arsenal [0134] with 25 prefix, no numbers.
I checked a pinned /0130\ that was demilled and it had no numbers. I have also searched high/low all over interweb pics for a pinned action with numbers and haven't found any.
I also received pictures of CARBINEs rifle as posted above and Im certain the barrel mark is not a number at all, and the 7 on the receiver is located very high on the receiver and is a very small font. Its likely a completely unrelated stamp compared to what we are looking for.
I checked my 0226 no numbers pin holes, but no screw hole.
I checked my /906\ no numbers, pin holes, no screw hole...
Then, I checked my DB....and found pinned barrel type 3 (?)
The pin holes were filled in, and smoothed...odd to go through the trouble of that when the rest of the gun is of questionable quality...there being no locking lug even.... also no numbers.
(http://preview.ibb.co/cBerKb/CIMG0060.jpg) (http://ibb.co/k92YXw)
I don't have the gumption to disassemble my bubba'd up Sporter today I suspect it will be the same as GM's NR
QuoteThe pin holes were filled in
Dont think so... looks to have had a pin long enough to protrude both sides and was ground even to the receiver prior to finish. That pin would drift right out.
Quote from: Loose}{Cannon on December 02, 2017, 01:25:21 PM
QuoteThe pin holes were filled in
Dont think so... looks to have had a pin long enough to protrude both sides and was ground even to the receiver prior to finish. That pin would drift right out.
That does make more sense....it looks nicer(ish) too. :)
I seriously doubt it would 'drift right out' though. The impact right there likely would have deformed it internally enough to make that a bear of a job to pull off...especially without a starter hole. Considering the lack of the locking lug, you would almost think they would skip the pin altogether and just hope the pressure would keep it in place long enough and that the receiver would crack before the barrel would fall out. chuckles1
Most the retaining character of the barrel to receiver is in the interference fit of their respective ID and OD.
Send it to me.... Ill drift that dude out, but I will NOT push out that barrel. The pinned barrel I removed, the receiver had to be cut front/back across the zone to relieve the pressure. The pin itself shouldn't be to difficult.
Quote from: Loose}{Cannon on December 02, 2017, 01:50:04 PM
Most the retaining character of the barrel to receiver is in the interference fit of their respective ID and OD.
Send it to me.... Ill drift that dude out, but I will NOT push out that barrel. The pinned barrel I removed, the receiver had to be cut front/back across the zone to relieve the pressure. The pin itself shouldn't be to difficult.
I think I will retain THAT pin, already have another to hunt down after today....dangit.
I would think that the pin was a formality then? I have heard you never want to try pull a pinned barrel. I am pretty sure the DB is going to be an infrequent shooter/wall hanger/discussion piece. It has a beautiful stock I refinished for her...considering her innards, she is a pretty gun now...just the other day a buddy said if he was going to steal any of them, that would be the one. I just laughed and laughed....
Do I need to post up that /0130\ receiver that freaking blew apart on someone?
:o
Was the cause determined?
and um....yes? Please?
Quote from: Loose}{Cannon on November 26, 2017, 03:39:30 PM
I need to know if you have a PINNED barreled chinese sks and if it has corresponding numbers stamped on the front left of the receiver AND on the left side of the barrel just front of the receiver.
Please report your findings and post pics if possible.
this?
(http://preview.ibb.co/cPqvNc/20180228_111442.jpg) (http://ibb.co/krNmTH)
Is it also on the receiver?
Quote from: Loose}{Cannon on February 28, 2018, 03:18:37 PM
Is it also on the receiver?
the "k" is the only stamp on that part of reciever
Quote from: SkooterTrash on February 28, 2018, 04:03:39 PM
Quote from: Loose}{Cannon on February 28, 2018, 03:18:37 PM
Is it also on the receiver?
the "k" is the only stamp on that part of reciever
This tells me the '0' on the barrel is not related to any indexing etc.... unless we find they marked barrels only to indicate a diameter range or something on the pinned barrels. All good data...
Thanks for the post SkooterTrash!
Quote from: Loose}{Cannon on February 28, 2018, 04:48:54 PM
Quote from: SkooterTrash on February 28, 2018, 04:03:39 PM
Quote from: Loose}{Cannon on February 28, 2018, 03:18:37 PM
Is it also on the receiver?
the "k" is the only stamp on that part of reciever
This tells me the '0' on the barrel is not related to any indexing etc.... unless we find they marked barrels only to indicate a diameter range or something on the pinned barrels. All good data...
Thanks for the post SkooterTrash!
No problem.