So whats the deal? does the gear asembly fit or not ? I am thinking of getting one of these 1/2 cases but not if the gears dont fit right. 17 mm are strong enough wheels i wouldnt woort about breaking them.

Sounds like a familiar issue- the bearing hole in the half-case isnt deep enough for the input shaft, so the bearing crushes against the gear when its all screwed together.

Fixable if you have a vertical mill and endmill bit, otherwise it needs specialist attention or returning to FLM for rectifying.

Rather annoying really as my stock plastic halfcase is rather ropey, but I wont replace it with an FLM item if its going to give me headaches, and I aint spending $100 on a full metal tranny from somewhere else just to get the half that I want.

Couldn't you just use a 1mm thinner bearing in the problem bearing hole?

Right. I think. Couldn't I use a dremel?

CLICK HERE to see what size the bearing is said to be and what it looks like. It is a 5X11 bearing so would this work? CLICK A 5X10

EDIT I guess it has to be 4X11?? And what is a flanged bearing?

Thanks,
Zack

It has a lip or flange on one side of the bearing. See pics in the link"

http://www.qbcbearings.com/RFQ/CoverPg/BallBearing.htm

Thanks Mark.

What about these? CLICK check the ones in post 185 as well.

I'm cutting some off the remaining input gear (2nd), should help, right?

The number in a bearing you need to be smaller is the width (thickness), not the diameter numbers...bearings are sized like this: IDxODxW, and the ones you listed just have their ID (inside diameter) and OD (outside diameter) listed.

So, whatever the width of the problem bearing, just get one 1mm smaller...if the stock bearing is 5x11x5, get a 5x11x4. The hole in the transmission case where the bearing goes needs to be deeper, not larger in diameter.

^^Yep.

Any mod to the tranny case needs to be done with abit more precision than a dremel can manage... :whistle:

You need a CNC mill to really get it done right... go to your local machinist...

you wouldn't really use a cnc to do clean up work like this. a mill, yes. CNC is computer numerically controlled- you wouldn't write a program for a CNC for one cut on a mill. There are CNC plasma cutters, water jets, mills and other things, CNC is just how they're controlled.

I imagine with my good carbide bit on my dremel I could add 1mm to a bearing hole. It would be easy to screw it up, but I'd try it.

Or you could just use the plastic half case...

Yeah that is what got a chunk knocked out of the MMM! Remember!? I think it finally did in the old fan aswell. I must have this new mounting configuration for the airflow and for the uniqueness and weight distrubution. Remember the MMM is now under the motor. The motor endbell didn't like the hit either but it took it for sure. The whole plastic case was FLEXING when landing jumps

As per my emails with FLM after they told me that it will work after me warning them that very few actually do in the real world, I'm sure they'd be obliged to fix it for me.

As long as you use an end-mill bit, because a drill bit won't work...and you better have a hand that is as steady as a robot, because you are making the hole deeper, not larger, and if you aren't robot steady you will mess up the diameter of the hole.