Breaking spur gear teeth problem.

Discussion in 'Gun Building, Modifications & Repairs' started by airsoftplayer14, Dec 24, 2012.

  1. airsoftplayer14

    airsoftplayer14 New Member

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    So I'm building a jg g3 with a m130 spring, with full metal tooth piston, a high torque gear set, ball bearing spring guide, and a SHS high torque motor. So my problem is that I have never fired a bb out of this gun because ever time I go to fire a bb a spur gear tooth breaks off and locks the gearbox up. How can I fix this problem for good? I also went through 2 spur gears with out firing a shot from this gun.
     
  2. TheAirsoftTech

    TheAirsoftTech New Member

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    I think your main problem is shimming, obviously. If you're breaking teeth off where the spur contacts the bevel you might be to low, this can cause the spur gear to hit the bevel gear's bushing. This is bad, it can cause teeth to break off very quickly. Your bevel may also be to high, this can also break teeth.

    So, buy a new set of gears and some shims.
    Take everything out.
    Clean the shell.
    Now, reshim. (With our help though.)

    Also, did you glue your bushings in?
     
    Last edited: Dec 24, 2012

  3. airsoftplayer14

    airsoftplayer14 New Member

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    No I did not glue the bushings. I have shimmed guns very well in the past, but this one beats me. I also cleaned the shell and every thing.
     
  4. TheAirsoftTech

    TheAirsoftTech New Member

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    It's got to be something wrong with the shimming, breaking JG gears is tough.

    Glue them in next time.
     
  5. airsoftplayer14

    airsoftplayer14 New Member

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    Ok I will and how well made are guarder gears mainly there spur gear?
     
  6. TheAirsoftTech

    TheAirsoftTech New Member

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    Not sure, I'v never used them.
     
  7. Robin-Hood

    Robin-Hood New Member

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    Inverness
    Spur too low, bevel/sector too high.

    Read the proper shimming guide here and shim with better meshing.
     
  8. airsoftplayer14

    airsoftplayer14 New Member

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    Keep the possible solutions coming I'm trying them as I type this.
     
  9. BoogerMc

    BoogerMc Airsoft Jedi Master Supporting Member

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    Akron
    Are you checking your alignment before installing the other parts of the gearbox?

    When I did my research for shimming and such, one of the resources said to put only the gears, with shimming, in and then assemble the two halves of the gearbox, using all the screws. check that the gears free spin correctly and without any slop or misalignment.

    It's an extra step, but its worth it in the end.
     
  10. airsoftplayer14

    airsoftplayer14 New Member

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    That's how I shim my guns.