What 3D/CAD models do you need? 3D files CAD request thread

I got the caliber trucks from grabcad

Oh boy hereā€™s my first time with CADā€¦

https://cad.onshape.com/documents/57dc5faa8f63301089e780c2/w/e4ad666a439a2e4441e5f325/e/547a59a31b6849bfc7f4bff3

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What is the link to your designs in github? Interested in helping with the design for my first build. Thanks!

Hey,

looks great so far! Some things You might want to extend the part for screwing in the motor mount - currently there is not much room for moving it.

Check this onshape tutorial - it illustrates how to connect different parts (with mechanical movements) - check the last part with the screws, might help for testing the movement of the motor mount :wink:

@mishrasubhransu I will have a look - do you know if the measurements are correct?

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Cool man! Thx for taking the time for the mudguards. Very curious to the result :slight_smile: Have you Found a solution for the wheel with belt and motor?

Thanks Pantologist! hat tip to you sir

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Are there any updates with the snap in pulley designs?

Been a bit busy, will get back soon.

I am in need of some decent drawings of 12t-33t HTD-5M pullies to be used in this project: http://www.electric-skateboard.builders/t/3d-printable-25-sprockets-and-htd-5m-pullies-wheel-driven-and-motor-driver-an-open-source-project/9897

Iā€™ve got a parametric version of an HTD-5M pulley, but I canā€™t get it to render below 34t- itā€™s in the source file linked above, part studio labeled ā€œ36t HTD 5M Pulleyā€, if anyone is fluent in OnShape and would like to trouble shoot it.

I can handle most file types: Parasolid, STEP, IGES, solidworks, etc.

The smallest pulley I can find a decent step file on is 18t.

Could you send me the file? I just started learning OnShape.

I ,actually, created a 32 tooth for the Abecs. I thought I posted it to thingiverse.:confused: Iā€™ll check, and if I havenā€™t, Iā€™ll put it up and post the link.

Hereā€™s the file for 32 tooth http://www.thingiverse.com/thing:1704197

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Iā€™ve created a new document in Onshape with just the parametric pulley and reference data:

https://cad.onshape.com/documents/57e1a9f6040f081151c91a83/w/f5f15f39425822a0326c6157/e/89f2ffb757ad667dc8100dd7

To edit this file, youā€™ll need to make your own copy as with all shared onshape documents.

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Thanks dude!!!

I tried to make a Snap in Kegel Pulley design.

https://cad.onshape.com/documents/57e83e8c88246d10b7c5e7c4/w/f9564c5386d3d609dd9a44eb/e/c129abdef5b0aba8cec341ad

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These look just as they should if you were going to get these injection molded and this would work excellently if you were going to pay the thousands of dollars to get a mold made and get them made out of injected nylon but as a 3D printed piece it wont work. when you get these 3D printed youre going to have the shear stresses in the same plane as the print planes. you WILL snap the prongs/studs on these. I snapped then off by hand then I was making mine and hey came out too big to test the fit on the rest of the wheel. The cavity it goes into are about 5.75mm in diameter so these will be that size or smaller and then 10 of these wont take the strains of a full grown persona trying to accelerate or brake. Looks like to me your design only goes as far down as the outer most edge of the core and not all the way down to the curved face of the core which will make this affect worse since youll have twisting between the pulley over a longer length allowing for more twist and strain on fast accelerations or hard braking. I bring this up again for your safety. Iā€™ve printed like 40 kegel wheels in total (some stock piled back ups but a little less than half of that was fine tuning the fit and Iā€™m telling you from considerable experience if you have someone use this they will more than likely get hurt due to a sudden loss of braking or power.

Please dont take this as discouragement of new ideas and concepts, its not that, Itā€™s just not safe for this particular wheel. The flywheel has much larger areas in the same shear planes and so that is more than likely well suited for this application though I would still recommend using Nylon SLS vs conventional thermoplastics. This concept may very well have worked if the holes in the core were bigger or if the printer materials were much stronger. PLA/ABS/PETG wont work with this. Nylon SLS might just be strong enough if youre using this with dual drive and splitting the load over two wheels or 20 prongs/studs. I think with a single wheel drive youd be pushing the limits here.

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Dang. Thanks for your expert insight. You really did do a lot of research and design.

It might have helped if I actual had a set of Kegels. :stuck_out_tongue:

Back to the drawing board.

If you fillet the base of the prongs, I am sure it would survive with nylon SLS printing (offered by shapeways).

I didnā€™t have a weighing scale around, else I would have given a concrete proof. https://www.youtube.com/watch?v=9qBiZjKlOZ8&feature=youtu.be

Like this?

yes like this, this will limit the amount of bending the studs will experience. However you see how you have a fillet on the inside as well? that isnt needed because the center of the wheel is flat once it gets to the bearing. Between the bearing and the edge of the hub I measured this to be just shy of 8mm so thats what I use on my models. Hope that makes sense. Pics for reference.

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