Neu Motors and dust
 

I got a question for any Neu owners out there. How many of you are using some kind of dust cover on your motor? Is it really necessary? I assume the holes are for cooling, and the motor has roots in the aircraft world where dust isn't as much of an issue. Does covering the holes cut down on cooling but keep abrasive dirt out of the motor? Is it better to leave the holes open for cooling and just blow the dust out on a regular basis? If left uncovered dirt will probably cause more bearing wear, but would this be partially offset by the additional cooling? Anyone try foam filters to cover the holes? Most brushed motors have open endbells and some even have holes/slots cut in the can for cooling.

Do you have one of these on?
http://www.rc-monster.com/proddetail...EUcover&cat=20

RC_KAOS, yes I have the RC-Monster dust cap. I was just wondering why Neu would put so many cooling holes in the motor can.

the difference in temp between having the holes covered and uncovered would be minimal. One of the great design features of brushless motors is that the windings are mechanically connected to the aluminum can, which disipates heat quite effectively. If you are running in dust protect your investment, cover those holes.

I made my own foam cover. I cut a thick chunk of foam and hollowed part out, cut slots for the motor wires and zap strap it to the motor can. I used a little oil on the foam too to grab the dirt. I just cleaned the motor last night and seems to work good as there was little crud in the motor.

Hey guys thanks for the replies. I will use the cover to keep the dust/dirt out of the motor.

And if you want to protect it even more, get the aluminum front plate. Not only does it keep the dust out, but prevents screws from hitting the coils if screwed in too far. Plus, it helps if you happen to strip out the threads or break a screw.

BrianG, I saw that front plate and I thought it would be perfect for my mechanical brake setup. The plate would act as a spacer to move the motor back to clear the brake rotors.

Yup, I guess it does that too. Such a small part, yet so versatile! :smile:

I use the rc-monster rear cover. I just put some duct tape or electrical tape over the front holes. The rc-monster aluminum plate doesn't fit the new Neu motors now. I believe the new batch of motors only has a .75 shaft. I originally had a 1515 1y and the aluminum plate worked perfectly. I believe that shaft was 1 inch. However, I switched to the 1512 and the shaft is shorter and it won't work with the aluminum plate because it won't leave enough room for the pinion to grab.

What about if you flip the pinion around??

Nope, still too short with the aluminum plate.

So i see you can get Neu motors with fans mounted to them:

http://www.amainhobbies.com/product_...ducts_id/14428

These look awesome and if Neu is installing these, dust can't be a HUGE problem(???)...

The Bigmaxximums also have fans on them, has anyone with a BM ever had troubles with dust getting in the motor?

thanks
jordan

hi

the question is if those fans on the NEU blow directly into the motor or just blow over the can. the plettenberg fans only create a blow over the finned can. the can itself is closed.

the NEU are still aircraft motors. i don't get it that they have not yet designed new motors with closed cans as obviously they are efficient enough to run cool without all those holes. its the same sad thing with those new kontronik kira motors or the new lenher versions with fans. they are just too open for real offroad applications and blow directly into the motor.

http://62.2.107.106/~beat/images/22-...dirty_(23).jpg
http://62.2.107.106/~beat/images/24-...imaxx_(19).jpg

the fins on the pletti are gone but you can imagine where they were....before the little stone got in there. but imagine what would have happened if the fan blew that stone into the motor can itself......

bye
rhylsadar

The problem I find with vented motors is small metalic bits of rocks end up stuck to the magnets. This probably isn't as big a problem in a brushless motor as the magnets spin and all the crud will get thrown off. Still can cause problems though. The vented and fan motors are designed to be used in non dusty environments. RC cars is not one of them.

That is a sweet design on the big maximums. I didn't know about that.

i didn't know the BM's were like that either :surprised:, that is a SWEET design!!

thanks for the pics rhylsadar

I tend to agree that the holes are left overs from the aircraft/heli motor design and was for addtional cooling. For offroad use the holes seem to be a liability, allowing dirt/rocks/metal particles into the can which would be bad.

Me personally, I use the RCM dust cover for the rear, and made my own out of thin aluminum for the front as my shaft was too short. But, I don;t see a probelm with the holes at all. And the cooling differences in covering them up is very minimal IMO. To me, the holes are no problem at all.

Cooling the inside of the motor is a little pointless since the coils are attached to the can. Maybe cooling the magnet helps?

As others have said, the BM fans blow air on the outside, so it's not an issue. I can see fans on the Neus helping more if the fin orientation was lateral, not perpendicular to the can, but regardless, they really don't need fans IMO.

Just take a piece of thin aluminum sheet and make a cover. It doesn't have to be thick to keep dirt out, but it should be thermally conductive so you can use the motor mount as a secondary heatsink...

As I did. :) Heh

Just got my RC-Monster Neu dust cover and I was wondering what is the best way to attach it to the motor? Some kind of glue? Pressed on (will it stay on)?

As an example, the few nitro motors in planes and helis I have seen did not run air filters. See how long a nitro motor in a car runs without an air filter.

Just found out that the fans on the Neu motors direct air over the motor case, like the BM. Rather than forcing air into the motor itself.

Check out this: http://www.readyheli.com/Neu_Motor_1...f-fslash-h.htm

jordan

Just press it on :) I have yet to have mine fall off or anything. Did not need any adhesive

Mine doesn't press on easily, unless I put it in a vice. The little screws are preventing it from going on. I could trim the inside of the cover but then I'm worried it won't stay on.

http://i160.photobucket.com/albums/t...x/CIMG0494.jpg

I have never seen a Neu 1515 series motor with those screws holding the endbell in place.Did you buy the motor new? or used?

I ordered it from Mike last week and I got it today. I didn't think those screws were normal, I've been looking at other Neu posts and haven't seen any screws. The shaft came with a flat spot in it also. Are the screws necessary?

I just recently recieved a Neu 1512/2D/F and a 1515/1Y/F and they both had flats and the screws. Must be a design change on newer motors.

Well I got it on my Dremeling it where all the screws are and I cracked it, but it would have went on if I Dremel'd it more. That's ok, I used a little plastidip to seal the crack, it'll do.

http://i160.photobucket.com/albums/t...x/CIMG0497.jpg

Maybe the screws are for the external cooling fan. I see the Bigmaxximum and maxximum have screws in a similar position to those to attach the fan.

The boxes for the Neu motors have dates on them.May I ask what the dates are on those boxes of those Neu motors?The production dates on my motor is 2-18-08.:rules:

Mine said 03/12/08 on the pretty little box.

I sent my NEU 1521 in for service and it came back with the screws. They are to hold the end bell in more securely.


Shon

ok, that expalins why I was having trouble putting the dust cover on. The older Neu motors did not have the screws, so the cover just slipped on. The new motors have screws which the cover was not designed for, so it is a tight squeeze to get them to fit.

Phatmonk, the dates on the boxes (Neu motors) are 03/19/08 for the 1512/2D/F and 03/12/08 for the 1515/1Y/F.

So is there going to be a new rear dust cover?

We just tried something that worked great. An outwears pre filter for a savage filter fits over the neu perfectly. sure it hangs out a bit but it provides good dust and water protection. I am picking one up today from the lhs for mine after we did that my my bud's e revo

That's awesome..

Do you think you could post pics after you add one to yours? Thanks!

Any chance you can post up a pic and do you know the size of it?