what is shimming?

[rugia]

now i know i should know this and i think whatever shimming is it must be very importent so i need some more experianced ppl to explain to me what it is and how to do it/fix it if its wrong

[Tripps]

Don't worry! A bunch of us didn't know about this the first time!!!

Shimming is the act of adding shims (go figure ;D ) to your gear-box to eliminate "play" between bushings. It is also to get the most out of the gears meshing properly (the whole distribution of force or some crap....)

Now, for the "MAGIC OF SHIMMING!!!!!!!" (Tripps waves hands and wiggles fingers). A good shim job is most helpful thing you can do to your gear-box. If you shim it to tight, your ROF will drop like the Hindenburg. To loose and you can break gear teeth, sling a bushing (also referred to as "the gun eating itself") and many more bad things. Here's a guide I learned from...it got purdy pictures.

www.858airsoft.com/upgrades/shim.html

#1 TIP: BE PATIENT! It takes me about 2-3 hours for the perfect shim job, but it is worth it. The benefits are WELL worth the effort.

[rugia]

ummm and what do the bushing do???


and what is "slop"

[electricblu]

side to side movement

[prometheus]

great link tripps! most have a hell of a time shimming a GB. this makes it simple and easy.

[Tripps]

The bushings align the gears inside the gearbox.

[franco1120]

Everyone I've talked to out at the field or online talk about shimming like its some esoteric artform that is nigh impossible for people to do themselves and it scares a lot of people off from even attempting or looking into how to do it