With me, it’s because the big bearing can move a little bit in the fan ‘house’, in the same way the bearing can move in Trampa superstar wheels. They are not pressfit.
Update. I only have this little play, when the brass/pulley is not mountet.
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So basically you don’t want the shaft to have any space so slip backwards?
So then you’d place a washer on either the motor mount or the motor in that photos case and then press the pulley against it making sure there is a little tension on the shaft so that the shaft wouldn’t go out through the back right?
But If you have a circlip on then you don’t have to worry about that right?
It’s not the shaft only, the can moves as well
In any case you need the brass tube first and then washers if needed.
It’s always easier with pictures…
Normally motors have some washers and then a circlip on the shaft which holds the motor together.
The SK8 motor has no circlip, as you can see the motor bearing is 6mm inside
If you want to make a groove for a circlip or add washers you need the brass tube first.
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And the bearing dosn’t get a lot of dirt…
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Is the sensor ok this waterproof or do I need to waterproof it?
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did you ever find the answer to this i cant seem to get the answer myself
Damn. I have been installing my hobbyking motor wrong for the past 3 months. I need to find the little tube. Where can I find a replacement tube?
Trampa have them. Its the same they use on their motors.
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Thanks for the link. But shipping for EU is not worth it. I will DIY one. Maybe from the wheel bearing spacer.
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Good luck finding a rod with ID=8mm and OD= 9mm. The original is exactly 9.07mm OD. The info about OD=10mm on Trampa’s page is wrong.
The SK8 has no circlip that’s why a spacer between motor bearing and pulley/gear is necessary. The space between motor plate and motor bearing is 6mm (inside the 10mm hole of the motor with 8mm shaft). That’s why the tube must be smaller than 10mm outside.
6.5mm brass tube from Trampa
Slided on the shaft, only 0.5mm sticks out now
Needs more washers to fill the gap
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Thank you for the measurements. I will try my best. I was wondering why my motor move about 1 cm or 2 when I push on the pulley side way. Maybe I can email hobbyking and ask for replacement parts.
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The original brass tube from HK is 17mm long but would only makes sense if you use HK motor mount and pulleys. What’s your mount?
I am using mounts by boardnamics. It’s about 6mm thick.
Then 17mm is way too long anyway and you would have to cut it. Personally I prefer the shorter brass tube and adding washers. The shipping for small parts from Trampa is not that expensive (I think a bit less than 10€) and they have all types of washers in different thickness, too.
$12 is not that bad. But I can not justify paying $11 shipping for a $1.2 item. I should be able to find some tubs or sand the side of wheel bearing spacers to 9mm wide and bore of 8mm. It’s DIY here.
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Hi , i coming to have the sk8 149kv . I use this with 10s batterry and focbox . Normally we can use this at 3500w . But mine , are hot after only 2km (90°c motor, outside 30°c) . And that with only 60a motor for 1380w (in ackmaniac app) My config app is normal , motor max/min 60 , battery max 60 , min 16 . And the brake are very soft . Do you know what’s problems ??!! I have 2 motors and it’s same for the two . I have motor mount carbon of trampa , and the screw are original . If you have any idea thx …
You may have very tight belt tension