.......but those measurement could be slightly different on his "built" M53 "if" he welded the nose-piece on slightly set back (or forward).....and then which MG42 Barrel-Bearing he uses.
We have to watch out for which "MG42" Barrel-Bearing is used as there are at least two different lengths of these.....not counting the MG3 and M53.
I am guessing that even though the 7.62x51mm/.308 has a different "pulse" when firing vs. standard 8x57mm......the Germans went for the slightly longer (possibly a mid-length by your photo) Barrel-Bearing vs. the two earlier MG42 Barrel-Bearing lengths....for better reliability when using their updated Flash-Hider that has the Booster-Cup/"Nozzle" machined into the rear of it for operation (?).
There are some vaitables that can be worked into his system......and then some slight modification to some parts to inhance operation of his specific welded-parts- M53 (dependant on caliber he wants to fire), but parts will have to be noted and switched bach-and-forth much like differnt caliber-barrels.....Booster-Cup/"Nozzles".........possibly Barrel-Bearing lengths, etc.. Basically, we are trying to assist in "adjusting"/problem-solving a new/non-working non-standard system..........if I am getting the picture/information correctly (?).
Der-Adler..........what is the measured length of that MG3 Barrel-Bearing in inch-measurement (?).
....and possibly length from rear of receiver barrel-stop (under rear-sight) to the front most portion of the receiver on your SA42 (?)....again, in inches please.
Regards, RichardS
US Army, Retired
Blanksguy2001@outlook.com
tula 308 problems.
Re: tula 308 problems.
I did use the m53 Recouperator. It seems fine I can compress it all the way and it’s smooth. The gun will pass the pogo test.
The bolt assembly is made up of m53 parts but has an mg3 bolt head. Before I used the mg3 bolt head it had the m53 bolt head but did not seem to make any difference. For this test I only used the mg3 bolt head.
The parts that work best for me seem to be the mg3 nozzle witch is 10mm and the 1.85” bearing. It also runs just as good with the m53 nozzle and 10mm booster.
I found the guy helping me got some video. https://www.youtube.com/watch?v=EDTHvUBrY5s this is running 8mm ammo with the 11.5 booster in the m53 nozzle with the 1.85" bearing. It was done with a cell phone so the audio is not that good for figuring RPM but I think it was close to 1050. I also found some of my video that did work. I will get it on youtube in a few. I was able to get the RPM out of it. It looks like using 7.62x51 and a 10mm booster mg3 or m53 I get about 915 RPM with the 1.85 bearing and about 1050 with the 1.93 bearing.
I also got the 13/8mm using the 1.85" bearing.
The bolt assembly is made up of m53 parts but has an mg3 bolt head. Before I used the mg3 bolt head it had the m53 bolt head but did not seem to make any difference. For this test I only used the mg3 bolt head.
The parts that work best for me seem to be the mg3 nozzle witch is 10mm and the 1.85” bearing. It also runs just as good with the m53 nozzle and 10mm booster.
I found the guy helping me got some video. https://www.youtube.com/watch?v=EDTHvUBrY5s this is running 8mm ammo with the 11.5 booster in the m53 nozzle with the 1.85" bearing. It was done with a cell phone so the audio is not that good for figuring RPM but I think it was close to 1050. I also found some of my video that did work. I will get it on youtube in a few. I was able to get the RPM out of it. It looks like using 7.62x51 and a 10mm booster mg3 or m53 I get about 915 RPM with the 1.85 bearing and about 1050 with the 1.93 bearing.
I also got the 13/8mm using the 1.85" bearing.
Thomas Jefferson put it best: "When governments fear the people, there is liberty. When the people fear the government, there is tyranny.”
Re: tula 308 problems.
here is what little video I got. https://www.youtube.com/watch?v=OmWTofvvNdI
Next time I will try to do a better job on the video.
Next time I will try to do a better job on the video.
Thomas Jefferson put it best: "When governments fear the people, there is liberty. When the people fear the government, there is tyranny.”
Re: tula 308 problems.
As far as the overall length. This receiver was once a semi auto build by wise-lite. The thing did not work . So my receiver is about an inch longer than it should be. What I did is I made a spacer about an inch long that goes behind the recoil spring and the buffer was extended by wise-lite when it was a semi auto. This must seem like a red flag but with the parts extended to make up for it, it does not seem like it would matter. I have the back of an MG3 that I plan to weld in bringing it to the correct length.
Thomas Jefferson put it best: "When governments fear the people, there is liberty. When the people fear the government, there is tyranny.”
Re: tula 308 problems.
The MG3 bearing pictured measures at 49.7mm or 1.96"Blanksguy wrote: Der-Adler..........what is the measured length of that MG3 Barrel-Bearing in inch-measurement (?).
....and possibly length from rear of receiver barrel-stop (under rear-sight) to the front most portion of the receiver on your SA42 (?)....again, in inches please.
The current build I'm working on using a M53 Yugo shroud and MG3 bushing measures at 19.5" or 495.3mm from the rear of the stop under the sight to the very end of the bushing (using a tape measure), with it being set to the 8 and 13mm specs I mentioned.
I also measured my Wiselite M53 from the rear of the stop to the front end as well and it is 19.25" (1/4" shorter). This gun runs good, but I've had a problem with getting burrs on the ends of the bushing slots from the bearing slamming into it...this explains it being that its short.
Re: tula 308 problems.
This is fantastic info. I will try to measure tonight when I get home.
Thomas Jefferson put it best: "When governments fear the people, there is liberty. When the people fear the government, there is tyranny.”
Re: tula 308 problems.
I get 19.5" from the rear of the stop under the sight to the very end of the bushing (using a tape measure) too. Today I re-measured everything. Looks like my bearing is 47.67mm or 1.877” it will stick out the bushing 13.19mm to 13.37mm and sink in 7.32mm to 7.61mm depending on what point along the bearing I measure from.
This seams like its really close.
The other thing I did is I took my Recuperator out and pushed it on a bathroom scale until it bottomed out. Than I backed off until I could barely see and feel it start to return. I would say 95% compressed and the scale read 30 to 32 lbs. I don’t know if that’s worth anything.
This seams like its really close.
The other thing I did is I took my Recuperator out and pushed it on a bathroom scale until it bottomed out. Than I backed off until I could barely see and feel it start to return. I would say 95% compressed and the scale read 30 to 32 lbs. I don’t know if that’s worth anything.
Thomas Jefferson put it best: "When governments fear the people, there is liberty. When the people fear the government, there is tyranny.”
Just got done looking over H. Dv. 181/7. Looks like I have been doing the pogo test wrong. I have always done it with the bolt forward. Looks like I should be doing it with the bolt to the rear. In this case my gun fails the pogo test. I have a m53 parts kit on the way so we will see how the spring is in it.
Sent from my SCH-I545 using Tapatalk
Sent from my SCH-I545 using Tapatalk
Thomas Jefferson put it best: "When governments fear the people, there is liberty. When the people fear the government, there is tyranny.”
Re: tula 308 problems.
mt4x4,
Why don't you just purchase new recouperator-springs and install them (?).
Sounds cheaper that the possibility of receiving worn/weak recouperator-springs with the used M53 Parts-Kit........(?).
Regards, RichardS
US Army, Retired
Blanksguy2001@outlook.com
Why don't you just purchase new recouperator-springs and install them (?).
Sounds cheaper that the possibility of receiving worn/weak recouperator-springs with the used M53 Parts-Kit........(?).
Regards, RichardS
US Army, Retired
Blanksguy2001@outlook.com
Re: tula 308 problems.
I got the kit because I'm building a second one. Is there a good source for the springs? I have no problem rebuilding both of them.
Thomas Jefferson put it best: "When governments fear the people, there is liberty. When the people fear the government, there is tyranny.”
Re: tula 308 problems.
I got my kit yesterday. What I difference the Recuperator has made. I have not shot it yet but it does the pogo test (with the bolt back like it should be) much better.
As a side note my kit from apex was in really good shape. The front half of the gun has the cam section intact. I think I will just need to clean it up and cut it square.
As a side note my kit from apex was in really good shape. The front half of the gun has the cam section intact. I think I will just need to clean it up and cut it square.
Thomas Jefferson put it best: "When governments fear the people, there is liberty. When the people fear the government, there is tyranny.”
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42rocker
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Re: tula 308 problems.
Always remember to leave as much of the cam section as possible.
Good Luck.
Later 42rocker
Good Luck.
Later 42rocker