E-Freeboard Freebord Open source Electric Caster


Here is a mock up of the JMK Ride wheel with a 36T HTD5M pulley


Still working on the main parts of this single motor E-Caster. I like the simplicity of the design right now.

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I’m wondering what people think of this method of attaching these pieces.
It should assemble right of the CNC without much or any finishing.

That base part they are attached to still need optimization.


Closer to a working model.

List of all the hardware you see

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Think the 4- means the 4x 5mm holes
utot-lazy-susan-2
The drawing itself appears to have 4mm holes, I realized as well I have to buy the stupid thing then I can work from there.


I was looking at this realizing the bolt could interfere with the wheel, and that the the part could be smaller.

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Oh forgot to say i got a simple design for a 30T HTD5M bolt on pulley done. Need to pick out bolts and nuts for it to usr then put them in the design. It will have a support bearing need to figure that out too.


The module base has been smallified


Got a new idea for the battery clearance problem.

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The current model can actually fit a 6355 motor.


I’ll test it with the 5065 motor I have now and try to pick up a larger motor that would fit.
well I do have some TB6355 I could use possibly.

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Very nice, love your cad modelling !
I would suggest making another design for the arm that link the wheel to thee board, with another part going more upright to make it sturdier
Like a very flat y (it’s hard to describe with word :sweat_smile: )

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Not sure exactly what you mean, as for strength a lot of the strength comes from the bolts+spacers that are not in the model yet.

I’m trying the design all the parts using the same 1/4" material, and single side CNC operation. This limits the parts that I can design, so lots of ideas is very helpful!!!


This is the best I can do quickly :joy:
It won’t cause problems to manufacture, I fear it will bend if you don’t reinforce it like this

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Ah I was guessing you might not realize it it supposed to have suspension!

I just started messing around with springs in CAD…

Tempted to use something like this:


https://www.aliexpress.com/item/4000056955069.html
https://www.aliexpress.com/item/4000218323821.html

Perhaps I could solve it like this


with a much larger spring
hmm i should use those bolts actually

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I can get you all of the fasteners for $5 total + shipping. Happy to do it, I have one of thee I just got in and can see that it will need work soon.

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Lol I was going to ask you for help on where to buy that stuff. The shoulder bolts were tough to find, china only makes 8mm ones in 100mm and I needed 110mm at least.
If you can find me 120mm long ones I could fit 6374 :yum:

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I will check with supply next week when I get back to work, Im pretty sure i can come up with some options.

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Interested in that stress testing… Hope they share it.

Yes i would like an extra deck for my wall.
for my wall yes.

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This is the main dimension I need. Guessing it’s like 105mm


Close enoguh

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Haha I actually just found someone with the same idea!





Center electric caster on a freeboard

Leiftech/summerboard version too:

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Oh it asked him and it is a custom slip ring and not taken from a leiftech

Looks very nice ? You sure you wanna go with the spring ?
If yes you should count more than 105mm unloaded for it to be close to freebord’s dimensions once on it

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