High Speed Gearbox Project

[Major payne]

Hello everyone,

So I am building a high speed Version 2 gearbox to sell. I have an Echo 1 shell that I reinforced the front of, and a ported cylinder with an aluminum cylinder head, I am going to go with a CNC'd aluminum ported piston head, I have and element piston body with the 3 first teeth removed (I am short stroking the gearbox) and I will be doing the same to a 16:1 or 13:1 high speed gear set. I will also add a ball bearing spring guide and piston head. I am going to put a MOSFET on it with 6mm bushings and run it off an 11.1 2000 mAh lipo. I am building this to sell (airsoft is my only income right now) and I am hoping to achieve 30 bps or higher on this gearbox....and it should be no problem what so ever. For the spring I am shortening a M120 spring so I should be looking at around 330 fps (perfect for an indoor arena) and I have not decided whether to wire it to the rear or the front.



-Garrett

928-899-5944

[spazz]

just a few recomendations here:
6-7mm bearings are a no go, they dont have balls large enough to work properly.
go with bushings instead, you wont lose that much rps and will still hit your goal. just make sure they are quality bushings.
for high speed set ups lose the bearing on the piston head and make sure to correct the aoe, mabey even swiss cheese the piston to help reduce the weight and speed up return times. also with a high speed set-up go with a pom piston head and not the aluminium one. high speed builds benifit from useing the lightest piston assemblys possable.
i dont recomend cuttin the spring, do yourself a favor and buy the right spring for the job and short stroke the gears down to the fps that you want it to shoot.

i have the gears, piston head and spring guide you need.

[Major payne]

Cool thanks for the input, I have plenty of bushings for the job heheh that saves me some $ What are the makes and specs on the items you have?

[Major payne]

So I was thinking, because its high ROF and the anti reversal spring takes a beating, what if I were to add two springs to the latch to provide more tension and a bit longer life on the anti reversal spring system?

[SLINKEY]

i agree with spazz for once haha, Loose the aluminum piston head,  and replace it with a polycarbonate type. like a g&p explosive which is by far the lightest piston head on the market. and the bearing bushings. get some quality steel bushings, the bearings will fail on you quick with all the dust and crap in the air when you play.

if it was me, i would use a 130 spring and do a 6 to 8 tooth short stroke.
with a 130 spring its around 15 fps per tooth when you have really good compression in the piston/cylinder.
i would also recommend a SHS blue high speed piston with full metal teeth. and then use a dremmel to make the ports on the piston walls a little larger to reduce the weight even more. and a magnum type motor, or even a high speed motor would make it really fast.
iv hit over 50 bbps with that setup. then i just went all out and put a 10:1 DSG in my gun haha


honestly iv never had an issue with any reversal latches. i highly doubt ull need to add more on it. just make sure the axles pivot clean in there.

[ThatGuy]

I wouldn't use the "explosive" piston heads lol I've had a few blow up.

The core piston heads  that Spazz has look really good but haven't tested them out.

I get 42rps and 400fps with 14:1 and a good motor  with out short stroking.
More food for thought  lol

[Major payne]

Cool Beans! Thanks for the input, I appreciate it!

[XavierMace]

One note nobody has touched yet.....

You say you are doing this to sell it.  You do realize you aren't going to make your money back, right?  Upgrading a gearbox just to sell it is pointless.

[Major payne]

One note nobody has touched yet.....

You say you are doing this to sell it.  You do realize you aren't going to make your money back, right?  Upgrading a gearbox just to sell it is pointless.

I am not doing it for the money at this point, I am just building up a quality mechbox to get my work out and hopefully get more tech work I have built up enough inventory of parts over the last 6 months that the mechbox should cost me almost nothing, so although being done as a form of advertisement it will bring in profit