Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by sketchism » May 26 2019 5:09pm

you shouldn't need to pad it at all they should pull tight around your hub

do you have a photo?
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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by Chopcat » May 27 2019 11:15pm

Will do Sketch.
Thanks.
Tc

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by sn0wchyld » Jun 07 2019 9:50pm

hey sketch, is this you on ebay, or at least one of your resellers?
https://www.ebay.com.au/usr/customcarbi ... 7675.l2559
just rather give my money to the actual creator rather than some copycat.

also would be interested in a 'shorter' version of the hubsinks with shorter fins. understandably would reduce the effectiveness but would be good to have an option for a more subtle look.

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by sketchism » Jun 07 2019 11:34pm

Hey mate yep that's my tooling company i have them up there as well as http://www.hubsink.com - ebay does take a bigger fee but it seems sometimes people find it there before the website

the only way to do that would be to go around with a coping saw and trim them down, i have done it once before to fit them in a custom build its achievable in an afternoon

sn0wchyld wrote:
Jun 07 2019 9:50pm
hey sketch, is this you on ebay, or at least one of your resellers?
https://www.ebay.com.au/usr/customcarbi ... 7675.l2559
just rather give my money to the actual creator rather than some copycat.

also would be interested in a 'shorter' version of the hubsinks with shorter fins. understandably would reduce the effectiveness but would be good to have an option for a more subtle look.
Don't overheat your ebike hub motor - www.hubsink.com (beta testing still open)
https://hubsink.com HubSink - Hub Motor Heatsinks

https://australiandroneco.com Australian Drone Co - Aerial Videography

Nothing is fool proof to a sufficiently talented fool, trust me we'll find a way :idea:

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by ridethelightning » Jun 27 2019 7:35am

just thought id post this for anyone who is super dedicated to keping their hub cool :mrgreen:

i carefully buffed the paint of my qs 205 before adding the hubsinks. i noticed when i did so that the qs paint was actually really thick! after i removed the paint i polished it with fine sandpaper, going down through the grades until i could see my face.

i then did the same thing to the undersides of the hubsinks, removing the aluminium oxide anodising, till i had mirror aluminium surface.

of course,i have nothing to compare it to but im sure it makes a huge difference.
the sinks have worked a treat! i love watching the temps dropping by the second when i ease off the throttle or stop. before i installed them, it was like 30 times slower to cool off.
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qs heat email.JPG

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by SlowCo » Jun 27 2019 9:02am

ridethelightning wrote:
Jun 27 2019 7:35am
just thought id post this for anyone who is super dedicated to keping their hub cool :mrgreen:
Is there ferrofluid in your hub motor?

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by amberwolf » Jun 27 2019 10:02pm

ridethelightning wrote:
Jun 27 2019 7:35am
i then did the same thing to the undersides of the hubsinks, removing the aluminium oxide anodising, till i had mirror aluminium surface.
FWIW, unless you use an antioxidizing compound (some type of heatsink compound, for instance) on those surfaces, they're going to reoxidize fairly quickly. (also, the surfaces are almost never completely flat to each other, so the airgaps between them won't conduct heat nearly as well as the heatsink compounds will--even the basic plain old titanium oxide white paste is better than air. ;) ).

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by ridethelightning » Jun 27 2019 11:47pm

SlowCo wrote:
Jun 27 2019 9:02am
ridethelightning wrote:
Jun 27 2019 7:35am
just thought id post this for anyone who is super dedicated to keping their hub cool :mrgreen:
Is there ferrofluid in your hub motor?
yes, ~10ml

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by ridethelightning » Jun 27 2019 11:52pm

amberwolf wrote:
Jun 27 2019 10:02pm
ridethelightning wrote:
Jun 27 2019 7:35am
i then did the same thing to the undersides of the hubsinks, removing the aluminium oxide anodising, till i had mirror aluminium surface.
FWIW, unless you use an antioxidizing compound (some type of heatsink compound, for instance) on those surfaces, they're going to reoxidize fairly quickly. (also, the surfaces are almost never completely flat to each other, so the airgaps between them won't conduct heat nearly as well as the heatsink compounds will--even the basic plain old titanium oxide white paste is better than air. ;) ).
I used white or grey heat sink compound in a syringe.
i spread it thin and evenly,(made sure no grit in it :wink: ) clamped the sinks on and watched any excess slowly oose out the sides.
then i wiped off the excess and gave it a touch up spray with black,carefully around the edges, where the shiny steel was showing slightly. i avoided getting any paint on the sinks themselves much.

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by sketchism » Jun 29 2019 8:00pm

haha absolutely awesome, i did similar but not as thorough to mine, and it was crazy how thick that paint was, almost a fill mm or more i would say, they really lay it on there!

if you are chasing ultimate thermal coupling this would certainly give you one less thing between the hub and the sink!


ridethelightning wrote:
Jun 27 2019 7:35am
just thought id post this for anyone who is super dedicated to keping their hub cool :mrgreen:

i carefully buffed the paint of my qs 205 before adding the hubsinks.
the sinks have worked a treat! i love watching the temps dropping by the second when i ease off the throttle or stop. before i installed them, it was like 30 times slower to cool off.
Don't overheat your ebike hub motor - www.hubsink.com (beta testing still open)
https://hubsink.com HubSink - Hub Motor Heatsinks

https://australiandroneco.com Australian Drone Co - Aerial Videography

Nothing is fool proof to a sufficiently talented fool, trust me we'll find a way :idea:

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by 999zip999 » Jun 29 2019 11:49pm

Is there puff in testing ? Results.

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by Chopcat » Jul 01 2019 6:42am

Chopcat wrote:
May 27 2019 11:15pm
Will do Sketch.
Thanks.
Tc
sorry its taken so long. mind you i am not getting more than 40C on the motor.
Not great pics however when all joined up together they move to the depth of the recess on the hub. 5mm?
_6210079.jpg
_6210072.jpg
_6210069.jpg

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by whereswally606 » Jul 01 2019 7:16am

I really like the brake boss position alas not possible on my full suspension rear triangle but I love how tucked out of the way that is. what frame is this. Sorry for the OT.
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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by Chopcat » Jul 02 2019 1:26am

Specialized tricross. There are more pics in the build threads.
viewtopic.php?f=6&t=100917

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by pwd » Jul 09 2019 9:56am

I want to move my Hubsink set over to a new motor. Is it necessary to remove the thermal grease from the hubsinks before attaching to the new motor? I have also ordered a few tubes of this to re-apply if necessary.

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by osa57 » Aug 15 2019 3:24pm

Hi,
I have a Falco hub motor, with internal width between flanges of 13mm (see picture)
Would this be enough to install the HubSink?
Thanks!

https://drive.google.com/file/d/1azY5SJ ... sp=sharing

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by hias9 » Aug 20 2019 5:57pm

Did anyone compare cooling performance of dual row hubsinks to single row hubsinks on motors like mxus 3k and qs205?
It would be nice to know if there is a significant boost in cooling performance.

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by silence » Aug 21 2019 5:45pm

hias9 wrote:
Aug 20 2019 5:57pm
Did anyone compare cooling performance of dual row hubsinks to single row hubsinks on motors like mxus 3k and qs205?
It would be nice to know if there is a significant boost in cooling performance.
viewtopic.php?f=2&t=48753&start=1302

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by hias9 » Aug 22 2019 10:53pm

Thanks. They also mention that 2 15mm rings would be more efficient than a single 30mm ring.
On all pictures with dual rings, the fins were lined up in a straight line.

Wouldn't it be more efficient to line them up like this or would that be worse?

Image

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by sn0wchyld » Aug 23 2019 12:30am

hias9 wrote:
Aug 22 2019 10:53pm
Thanks. They also mention that 2 15mm rings would be more efficient than a single 30mm ring.
On all pictures with dual rings, the fins were lined up in a straight line.

Wouldn't it be more efficient to line them up like this or would that be worse?

Image
By this point I think you'd be splitting hairs as to which is best - however I suspect staggered would be slightly better - slightly more surface area, and should create slightly more turbulent air. But i think you'd struggle to tell the difference even in laboratory conditions, and you'd probably get greater variance just by applying too much/too little thermal paste...

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by hias9 » Aug 30 2019 2:15pm

Is it better to grind off the black coating from the motor where the hubsinks will sit or does it not make a difference?

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by sn0wchyld » Sep 09 2019 11:47pm

hias9 wrote:
Aug 30 2019 2:15pm
Is it better to grind off the black coating from the motor where the hubsinks will sit or does it not make a difference?
Same story, ( you'll see no notable difference) but im less sure of it.... the paint is wafer thin, so even if it was a good insulator (its probably not) it wouldn't be thick enough to have a big impact. Given its probably an ok thermal conductor, then the difference wouldn't' be worth the trouble IMHO, particularly put next to getting rust on your motor, and potential (but unlikely even if riding through salty water) galvanic corrosion issues.

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by rockstar195 » Sep 12 2019 7:35pm

Has anybody have luck running the hub sinks ONLY, with NO FF or Statorade?

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by sn0wchyld » Sep 12 2019 7:46pm

rockstar195 wrote:
Sep 12 2019 7:35pm
Has anybody have luck running the hub sinks ONLY, with NO FF or Statorade?
difference will be marginal at best - the biggest issue is the air gap between the heat source (stator windings) and the 'cool' motor casing. You can easily get your windings/stator over 150C while your outer casing is still barely above ambient, as air is a pretty good insulator. Ebikes.ca did some pretty comprehensive testing, and the ranking of effectiveness goes:

Statoraid + hubsinks
Statoraid
and a long way behind
Hubsinks
unmodified hub.

Basically there's no point in improving the heat dissipation of a heat sink (the outer shell with our without hubsinks) that isn't thermally coupled to the source of heat (your stator). That coupling is the job of the statoraid, or other alternatives people have tried by filling motors with oil etc.

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Re: Ebike Hub Motor overheating cooling solution - HUBSINK OFFICIAL THREAD

Post by sketchism » Sep 24 2019 6:43pm

Ive had a few enquiries for one-off versions of the hubsinks for non standard motors and now i have my CNC back up and running ill do a small-run of billet Hubsinks

the main enquiry i have is for the QS273, but i have been given 4 or 5 different curcumfrences of the magnet ring, i would be hesitant to send them out without testing them on a motor first

if anyone with a QS 273 is interested in a BETA set of hubsinks for it, measure the magnet ring as accurately as possible (with a few different methods to avoid a tehnique error perhaps) and let me know and i'll design and CNC a few sets up for testing
Don't overheat your ebike hub motor - www.hubsink.com (beta testing still open)
https://hubsink.com HubSink - Hub Motor Heatsinks

https://australiandroneco.com Australian Drone Co - Aerial Videography

Nothing is fool proof to a sufficiently talented fool, trust me we'll find a way :idea:

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