Originally Posted by T^2 (Post 1493494)

You're gonna have a hell of a time taking those CIMs off without disassembling the entire gearbox.

Standoffs do not need to be 1/2". You have too many of them, in any case; the ones on the far right and left are completely unnecessary.

Originally Posted by Ari423 (Post 1493495)

From what I can see, the two screws holding in the CIMs are accessible from the outside. One screw looks to be the top standoff screw, and there is a hole (in line with top and bottom standoffs, below CIM output shaft) to unscrew the other screw. Then it should be as simple as popping off the CIM gear and sliding it out of the enclosure. I could be wrong, but I imagine this was SerpentEagle's intent when designing it.

This is a nice, compact gearbox. How much does it weigh? Also, did you think about the abundance of possible pinch points where someone could get a finger stuck? I imagine it shouldn't be that hard to cover with some clear plastic (which will also help keep out scruff) but maybe you have a better idea.

Originally Posted by hectorcastillo (Post 1493499)

The design looks really cool! One thing that I thought of is you could add two or three #8 tapped holes in a circle around the front bearing and use some button head screws to hold your bearing in place instead of a retaining ring.

Originally Posted by Richard Wallace (Post 1493507)

My team has been retaining things on hex shafts by means of 1/4-20 button head cap screws and standard washers at each end. Thunderhex shaft stock makes this method very easy, because its center hole is just right for the tap. We often drive the shaft using a 1/2 inch speed wrench while holding the tap stationary. Of course this method requires us to cut shafts very close the proper length to hold whatever components are riding on them -- we use a scribe to mark them and a small lathe to face them for that.

Originally Posted by asid61 (Post 1493516)

The way your standoffs are supported, they're almost cantilevered off the main body of the gearbox for the left and right ones. You are also using 6 standoffs versus the traditional 4, any particular reason for that? Removing the leftmost and rightmost standoffs would simplify it a little.
I think you have 2-4 too many pockets, but proper build season planning can offset the machine time in the case of a drive gearbox.

Originally Posted by SerpentEagle (Post 1493549)

I plan to mount this in an unorthodox way. The bottom two standoff bolts are combined as mounting bolts an the bottom CIM mounting holes on the front plate is tapped to seve as another set of mounting holes. Good idea or a dreadful mistake?

Originally Posted by Bryce Paputa (Post 1493557)

This is very similar to what we did this year, and we had an issue or two where the small bolt loosened, fell out and got stuck in the chain. I would recommend making that bolt go all the way through the gearbox with a standoff so that even if it loosens up it won't be able to fall out, but that might make it harder to assemble.

Originally Posted by ARI423 (Post 1463495)

From what I can see, the two screws holding in the CIMs are accessible from the outside. One screw looks to be the top standoff screw, and there is a hole (in line with top and bottom standoffs, below CIM output shaft) to unscrew the other screw. Then it should be as simple as popping off the CIM gear and sliding it out of the enclosure. I could be wrong, but I imagine this was SerpentEagle's intent when designing it.

Originally Posted by SerpentEagle (Post 1493558)

Would loctite solve this problem? But yeah I could probably just run the bolt all the way through to the CIM.

Originally Posted by Chak (Post 1493559)

Wouldn't that ruin the accessibility of the CIM in the original design?
So Loctite would be the better choice.

Originally Posted by BenGuy (Post 1493697)

Just so you know Shashank - Superb is making this - I would have to spend the entire build season on the mill to make this... :D :D But a cool looking design for sure!

Originally Posted by SerpentEagle (Post 1494464)

Aw man! Looks like I'm gonna have to find someone else up for the challenge lol. Thanks.