Disassembling a 2312 motor

[J Dot]

Not true,
I replaced all mine with boca bearings. Getting the bell off the armature is the hard part! I built a jig above, using a piece of aluminum and a screw ( also using 4 motor screws, ) to remove the bell, then using a different screw ( just smaller than center hole of bearing ( and a hammer ) I angled screw through top bearing hole and wedged it against bottom bearing ( gave her a couple decent taps, ) out it came ( then ) using a dowel larger than center bearing hole, I tapped out top bearing!
The bearings are different sizes ( top / bottom )

Top is 4x12x4mm
Boca: ( Smr-604 series )

Bottom is 4x8x4mm
Boca: ( Smr-684 series )

Several models in each series from $10 each to $60 each

But those are the sizes, you might find some generics to fit, but I don't trust them, boca is local, and this should prove my point

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So I only use top of the line stuff on my crafts! Would hate to lose $1200 because of a $10 bearing!

But it can be done!

J Dot


You'll need to use your old bearings to tap in new ones ( as not to damage race with hammer ) just stack old bearing on new bearing ( like a tower ) and tap against old bearing to press new one into slot, works great!

 

[Gimpster]

Thank you for the detailed response! I'm going to go ahead and get some ordered and get to work on it. That gives me a lot of confidence to proceed.

I'm a Floridian by birth (last city I lived in was Boca Raton actually), so I'll put the money back in my old stomping grounds

 

[J Dot]

Lol
I used these

Hope this helps.

J Dot

 

[Gimpster]

Yes that helps a lot, because I was googling what exact model #'s I should buy. There are a zillion different options and it gets confusing.

 

[J Dot]

Yes
Those are better than the lesser ones, but not as good as the really expensive ones
But they are a HUGE improvement over stock! And the best deal for the buck! Trust me it took me 3 hours of writing down numbers, sizes, what the difference is between the $8 bearing, and the $10 bearing ect!

Just order those, you'll be HAPPY!

J Dot

 

[Tsm895]

That was pretty simple. Nice Job!

 

[Tsm895]

What web site did you buy them off of? Im not in florida (Texas)and I have no hobby shop that really sells any drone stuff unless I drive to Dallas. (1.5 - 2hrs+ away)Yes it sucks living in a small town but I never want to live in the city. Just like to visit and then go home! Lol. But I like the idea of repairing the motors!!

 

[J Dot]

Boca Bearing Company :: Ceramic Bearing Specialists

Use numbers above, to order ( boca is putting together a kit for the 2312 motors, not sure if avail yet?
But my numbers are good! Best for the buck!

J Dot

 

[Gimpster]

So, tonight I designed a little jig and printed it on my 3D Printer, hoping I could get the *black* DJI E310 2312's apart. I knew these motors were a little different than the silver ones you guys had pictures (mounting base specifically).

My jig worked great.... except that the stator detached itself from the base... shaft, bearings and all. That whole thing is just press fit into the base. At this point, I realized this motor is pretty jacked now and I was glad I had a spare to put on my quad. You can get these motors for ~$25/pair shipped.

I then put like a 8mm socket on the prop side and popped it a couple times with a center punch + *3* pound sledge and didn't even budge.

So, in the case of these motors, it seems like a press might be required. Unless someone has a better idea.

Attached pictures of this fiasco.

 

[J Dot]

WHOA!
That is Freaky scary! Only that little pressed In sleeve hold on your whole motor! Why 4 screws? They do nothing! Oh man, I'll NEVER use those motors, after seeing that! Another wonderful DJI CRAPPY DESIGN!

TRUELY
Scary design!

Hope you find a better way my friend!
But I would not risk my bird with those! The motor can come off the base, where nor the screws or e clip can save it. I'd look into other motors that DO NOT SEPERATE AT BASE PLATE!

Just my 2 cents!

J Dot

 

[Gimpster]

I totally agree with you! When I was pressing (just barely mind you!) and saw the whole sleeve coming out I was like ...what a joke design. In fact, now that its pressed apart, I think the bearings are fine and the impact from a crash 2-3 weeks ago dislodged the sleeve in the base and took it off center. Either way, this motor will never fly again.

Thankfully, these are used on my ~$75 invested 3D printed quad, not my P3A So I'll keep using them until they croak and replace them with something else.

 

[Gimpster]

Also, if anyone else wanted to 3d print my little jig, here are the files attached. I attached the SketchUp and the STL. Basically you just use a 4mm bolt with a nut (you put it on the underside in the recess) and out she comes!

 

[J Dot]

Gimpster,
I don't have a 3D printer, but if you could make me one, I'd gladly pay you for your time, material, and ship!
Let me know. Very cool by the way, unlike my very CRUDE version, but IT WORKS, lol. I really do not take them motors apart MUCH, usually I just replace them all together, but occasionally I'll get a single bad bearing, and I'll just replace the bearings ( depending my mood ) and yours would be a great tool to have, for those rare occasions! I'd even get 2 off you ( as I have a buddy ( local pal ) who I think would love one, as he borrows my RC chassis gig I built ( old RC-10 frame ) a LOT! ) Lol

Take care, shoot me a pm, let me know! A+ looks nice, great job!

J Dot