How to break an AEG

[Syn]

Originally Posted by Killbucket

Pics coming. The mechbox was in amazingly good condition. A set of bushings and a piston is all it needs to run again. I took pictures of the autopsy, I will post them later today.

I did this because so many noobs (self included) hook bigger batteries to airguns in hopes of better performance. All it does is make the motor run faster.
The OA93 pistol had a stock mechbox in it for construction purposes. I have a hot-rodded one going together for it, so I thought why not show how well the "metal gearbox" in the current crop of MPEG's hold up.

I have lots of parts on hand (I have over 30 personal guns, in addition to building the 1919's, M2's, Stingers, and running a Chinese M14 clone parts business), So chewing a piston for the sake of illustration was good math.

I have to hand it to the cloners...a minute and a half of continuous operation at nearly double the stock voltage (12.89volts on my old Beckman meter) is impressive alone. The fact that it can be fixed with $30 in parts shows how far we've come.

Sorry if I sounded too judgemental. Thanks-->Autopsy photos ftw. Bushings and piston only ?
SHite I thought it was going to look like
http://img406.imageshack.us/img406/1...oheavenou3.jpg

[Killbucket]

Ouch is right!

[arman]

thanks killbucket...you should fix the gun for when the zombie's come!!!

[Killbucket]

http://www.youtube.com/watch?v=omXaCN5gq1o

[Killbucket]

Here's pics of the total damage. Not much to fix here, note the piston teeth tearing away. On a cheap piston from two years ago, the last one or two teeth would have torn off, taking a portion of the piston skirt. Here, we just have the tips of the gears coming apart. Much better composites in use.
Then the bushing on the gear. Considering the abject ABUSE I gave this poor, feckless gearbox, this is amazing. You can see how much wear there is by the deflection caused when I pinch one side of the assembly. Again, a part from 24 months ago would have welded to the shaft when it stopped, or had a gigantic hole in the middle.
If you think about it, I didn't complete my test, as the gun WAS still "operating" at the stop. I imagine some noobs would continue to run the gun, because the change in sound could have been missed as the parts wore over months instead of moments. If the gun was returned to use in this condition, it would function until the last few teeth wore off the piston.
The gear appears to be pitted, but that's piston teeth bits stuck to it.

[DSFD506]

Originally Posted by Syn

SHite I thought it was going to look like
http://img406.imageshack.us/img406/1...oheavenou3.jpg

That's the exact thing that happened to my Guarder reinforced box except it was only one side that was broke. Thought maybe some JB Weld would hold up but that was a no go.

[Mooseburrito10]

Originally Posted by DSFD506

That's the exact thing that happened to my Guarder reinforced box except it was only one side that was broke. Thought maybe some JB Weld would hold up but that was a no go.

I was about to get one of the guarder reinforced GB sets. Were you running it at excessive power levels or anything of that nature?

[DSFD506]

Originally Posted by Mooseburrito10

I was about to get one of the guarder reinforced GB sets. Were you running it at excessive power levels or anything of that nature?

It was only shooting around 380fps and was installed by a gun doc. I think it was Illusion that told me he has always had trouble with Guarder GB's. I have Guarder internals and love them so I hope it was just a bad box.