Off season special project (Gearbox)
 

So this is our new gearbox about to be machined. It's for a special project we're doing. I wanted to ask if it looks okay and not suspicious about whether it will fail.
Specs:
-4 Cims
-9:1 GR
-Dual Output Shaft
-14lbs


https://fbcdn-sphotos-h-a.akamaihd.n...0dd1044e156ef4
https://fbcdn-sphotos-h-a.akamaihd.n...0515df7ad57636

Re: Off season special project (Gearbox)
 

Plate and gear materials? That's probably got more to do with whether it'll fail than anything else combined...

Re: Off season special project (Gearbox)
 

It's AL 7075 for gears, AL 6061 for plates and shafts. besides the cims the rest is all 316 stainless steel.

Re: Off season special project (Gearbox)
 

Looks really good!
From just looking at it, I don't think it would fail. It's hard to get a good view of the plate design because they're dark black, but it seems like the center part with the three center bearings isn't too well connected to the outside parts. Check out picture of 254's gearbox plate design for some inspiration if you'd like.

Re: Off season special project (Gearbox)
 

https://fbcdn-sphotos-h-a.akamaihd.n...61a7c5e8c4251c
Here's the plate view

Re: Off season special project (Gearbox)
 

6061 shafts? Make them 7075 at least, or some kind of medium carbon steel if you can.

Re: Off season special project (Gearbox)
 

For .500" hex shafts that aren't cantilevered in gearboxes, 6061 is likely strong enough.

That said, vex pro sells .500 hex shaft that is a great fit for their products at a pretty reasonable price.

Re: Off season special project (Gearbox)
 

Hmm this thing is supposed to last atleast 3 years. So yeah might change shafts to 7075 then.