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Mecanum wheel

by Zaggo, published

Mecanum wheel by Zaggo Apr 18, 2010

Description

[UPDATE 1: Sorry, I just realized, that I accidentally used 80034 ball bearings, not 624 ball bearings for this design. I'm already working on a updated, new, better, nicer and prettier design, using "real 624" ball bearings. I'll publish this new design on thingiverse shortly. For more information on this, see http://pleasantsoftware.com/developer/3d/2010/04/22/the-power-of-reading/.]

[UPDATE 2: The new design is now available: http://www.thingiverse.com/thing:2473 ]

Ok, RustySpoon1121 beat me on this one ( http://www.thingiverse.com/thing:2318 ), but since my design is different (only 8 rollers, centrally mounted) and already finished anyway, I publish it as an alternative approach.

I use 624 80034 ball bearings to mount the 8 rollers on the center wheel.

For more information on the project (and more detailed build instructions), please see my blog post at http://pleasantsoftware.com/developer/3d/2010/04/18/the-power-of-vacuum/

Recent Comments

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Thanks for the reply =) I have actually printed several of the other variation (been meaning to post pictures). But the ABS ones still suffer from a bit of curling when its doing the delicate bearing holder parts. I have printed a few in PLA as well that did not have this problem. I'm pretty anal about how perfect my prints are and I find myself not just settling till its perfect.

In short I'm still looking to combat that curling in the bearing holder area, this design seemed like it would do just that. Nice design tho and I will be using your wheels in a rover that I can control through skype =)
Assembling this design didn't work so good and the construction wasn't very sturdy. Printing the thing in one piece is much more stable, easier and more elegant.

Since the bearing retainers are arranged in a 45
° angle, no support material is needed during printing!
The whole redesign process (and the reasons for the new design) are described in detail in my blog post "The power of reading" (see link in this things description).
Is there a reason you abandoned the removable bearing holders? Was there a mechanical reason? Seems like this would print better than the new one, since there is a lack of good support material.

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License

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Instructions

For one Mecanum wheel, you need to print:

  • 1 center wheel (either a left "Felge-links.stl" or a right "Felge-rechts.stl")
  • 8 holder parts ("Lager.stl")
  • 16 half roller parts ("Rad.stl")
  • In addition to that, you need (for one wheel):
    • 8x M4x60mm bolts (alternatively, 8x M4 threaded rod, each 60mm long)
    • 8x M4 nuts (16x if you use threaded rods instead of bolts)
    • 32x M4 washers
    • 8x 624 80034 ball bearings
    • 1x M3 nut
    • 1x M3 bolt, e.g. 15mm or M3 set screw
    For detailed build instructions, please see http://pleasantsoftware.com/developer/3d/2010/04/18/the-power-of-vacuum/
Is there a reason you abandoned the removable bearing holders? Was there a mechanical reason? Seems like this would print better than the new one, since there is a lack of good support material.
Zaggo - in reply to Rift
Assembling this design didn't work so good and the construction wasn't very sturdy. Printing the thing in one piece is much more stable, easier and more elegant.

Since the bearing retainers are arranged in a 45
° angle, no support material is needed during printing!
The whole redesign process (and the reasons for the new design) are described in detail in my blog post "The power of reading" (see link in this things description).
Rift - in reply to Zaggo
Thanks for the reply =) I have actually printed several of the other variation (been meaning to post pictures). But the ABS ones still suffer from a bit of curling when its doing the delicate bearing holder parts. I have printed a few in PLA as well that did not have this problem. I'm pretty anal about how perfect my prints are and I find myself not just settling till its perfect.

In short I'm still looking to combat that curling in the bearing holder area, this design seemed like it would do just that. Nice design tho and I will be using your wheels in a rover that I can control through skype =)
Hi, I can get a 624 bearing, but can't figure out where you source 80034 from. Can you please post a link?
Sorry, I can't remember where I got them. The number 80034 is written on the side, but I'm not sure if this is a general code or some manufacturer code... These bearings have an ID of 4mm, OD of 16mm and are 5mm thick.

However, I published an updated version of this design in the meantime, using "real" 624 ball bearings. You find this design at thingiverse.com/thing:2473
624 ball bearings are much easier to come by and the updated design is also improved and needs less printed parts.
Mecanum Wheel MK2
by Zaggo
cool! I will check it out -- thank you for the info.
Good use of bearings.
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