Keda KA20-26M

[teslahed]

Does anyone have much experience with these motors?



I've had good success with them running 8 and 9 inch props on 3 cells.

After running them for a few months some have developed rattles. Looking at them the e-clip has become bent out of shape. They come with spares but I'm finding it quite difficult to replace them as they seem very stiff and difficult to get on.

Has anyone else successfully replaced the e-clips on these motors and if so do you have any advice?

[Gaza07]

I don't have any of those motors but I do have some of the keda thumrun motors and would think the circlips are similar if not the same, the weird thing is I was doing a bit of work on one of my quads, and the bell housing just pulled of it took quite a bit of force but the circlip was gone, I wonder if it flew like that 

I got one of the spares they supply and managed to ruin t by over stretching it, and really struggled to get one on, There must be a special tool for fitting them but I bet you cant buy one, I think it must be along the lines of a tube that fits over the motor shaft and is tapered the other end to allow it to be loaded with circlips, which would slide over the shaft when the tube is over the end of it, if any one knows how its done if is there is a tool, I would be very interested in getting one 

[teslahed]

My best bet might be to visit the local model shop and see if they have any generic e-clips of the right size. Most e-clips are easier to get on than the KEDA ones (at least that i've tried).

[Gaza07]

Are they called e-clips I though they were circlips as they look the same as the larger ones with 2 holes in that you use the circlip pliers with 

[teslahed]

I thought they were called eclips but google tells me that they are called 'circlips'.

I found this;

http://www.giantshark.co.uk/forum/viewtopic.php?f=8&t=8326

It seems other people have had the same issue as me and have just replaced them with new ones.

[Gaza07]

Well if you Google e-clip it comes up with the clips we use  and here's a picture of a tool that is supposed to do them the duratex eclip tool

[attach=1]

[Gaza07]

I found a couple of video's the one with the tale is a good idea as they shoot off any where

http://youtu.be/5TBKBEmyQiY

http://youtu.be/wn4zuDDUlHQ

[teslahed]

I've just got back from the local hobby store - massively overpriced but they did have the Eclips / circlips that i needed (the model shop called them e-clips).

I'll take some pictures later but they look a lot stronger than the ones that came with the Keda 20-26Ms to start with - so much so that I'm replacing all the old clips with new ones. The couple I've fixed so far are rock solid now.

The e-clips I've ended up with are quite large and chunky - they only just fit but on the plus side i can fit them without anything more than a small flat head screw driver.

[teslahed]

The spindly looking eclips are the ones that came with the motors and the chunky ones are the new replacements. Just looking at them it seems fairly obvious the new ones are going to hold up better - the old ones bent very easily when i was removing them. Considering the quality of the motors the clips that came with them are a bit poor.

[Gaza07]

I agree the keda clips are rubbish my thumruns have the same flimsy ones as yours, just out of interest you can get some clips from rctimer $1.00 for 10 here http://www.rctimer.com/index.php?gOo=goods_details.dwt&goodsid=192&productname=

[attachimg=1]

[pheasant_plucker]

Look on ebay.
http://www.ebay.co.uk/itm/E-RETAINER-CLIPS-METRIC-3-2MM-DIN-6799-QTY-250-/180495236112?pt=LH_DefaultDomain_3&hash=item2a065abc10

Gerry

[teslahed]

That is very cheap, although the rctimer ones look a bit easier to install with a flat head screw driver (because they have the flattened side opposite the open side).

I ended up paying £1.90 for 10 at the local hobby shop just so i could get my quadcopter fixed today.

[MadMax]

The keda ones do look crap, what size is the clip for a 3.17mm shaft ? I see on the link to ebay they are for 3.2mm but wont these be a bit sloppy as the shaft is 3.17mm with a groove, so the actual diameter is less than 3.17mm or are the clips sized by the out side diameter of the shaft ?

[teslahed]

That's a good question. At the moment they seem a lot better than they were before but if they start rattling again I will look into sourcing some that are definitely exactly 3.17. The ones i found at the model shop seem to fit fine but where actually unlabelled so could be any size.

[Gaza07]

I would think they are sold to suit the shaft size as the groove is very shallow if it wasn't it would probably make the shaft weak at that point, Im guessing the 3.2mm linked to above are the correct size although I also like the look of the rctimer ones 

[teslahed]

Well after all that effort I've definitely improved things but a couple of my motors still have very slight rattles.

The only thing i can think is that the motor axle isn't pushed all the way through (or pushed too far) so that there is a tiny gap between where the eclip sits and the edge it rests up against. Tomorrow I'll try and find the right sized allen key so that i can loosen and re-tighten the axle in exactly the right spot.

Has anyone else encountered issues like this with any of their KEDA motors?

Edit - got a quick video of a testflight earlier today, in the garden;

Quick test flight in the garden

[Gaza07]

Nice you should have put some washing on the line you could of dried it with your quad 
I have had the grub screws come loose on my keda motors after a heavy landing or crash, I always use a bit of blue thread lock on them to stop them coming loose due to vibration in flight 

[MadMax]

Nice video it got me thinking that a group of flyers could set up a course with different heights of ropes and have a race to the end with some ropes being fly over and some being fly under, or a limbo comp see who could fly under the lowest