What diameter clearance do you have? you could get quite creative with bolting some hex hubs together with standoffs.
possibly take a tube with a close enough inner diameter and shoot two pins through it to retain the shafts?
The VersaPlanetary 1/2" hex output also has a 1/4-20 hole in the end, you could possibly tap the end of the other piece of hex shaft, take a short piece of threaded rod, twist the two together then take a 1/2" Hex shaft collar on the outside to overlap the two which would transfer the torque.
You can always throw away the shaft that came with the gearbox and make you own longer shaft out of some hex stock. We have done this a few times with planetary gearboxes. It will probably involve turning one end round, adding a snap ring groove, and milling some flats. This is very doable with a manual mill and lathe.
It’s not a money issue we have extremely limited space. I know your mobile cart solution and if we even had a closet I would do that but we don’t. We also don’t have anyone who knows how to use a lathe or a mill (outside of my extremely limited experience).
Wow. The table’s about the area of two-and-a-half FIRST totes put end-to-end, and holds most of our hardware in addition to the machines (which I’m certain someone would help you learn how to use!) I can’t imagine even trying to build a robot without enough space to store something like that.
I hadn’t bothered to look at the inner workings of the VersaPlanetary until now. That is quite a spline. Since we a) never use planetaries for high torque applications and b) like to customize the output shaft I don’t see us investing in these any time soon.
So as a follow up to my original suggestion, first buy a Banebots P60 and then DIY the output shaft.
We have to clean up every night (except Fridays), too. That’s one of the things that makes the cart so nice… EVERYTHING has to be taken out (from our closet on the second floor) and brought down to the tech shop (in the sub-first floor, 1.5 stories down), and EVERYTHING has to be put back. The cart goes everywhere with us: to off-season events, to regionals, to and from our work space…
You should reconsider. In industry, planetary gearboxes are the go to gear boxes for high torque applications. The versaplanetary’s load carrying capability is only limited by the aluminum hex shafts ultimate strength. It is stronger than its spur gear counterparts.
It has larger output bearings and a 28 tooth 0.5 module spline that has incredible load carrying capability.