Slew Bearing Conic, with Spacers, parametric Design with Fusion 360

by TheGoofy, published

Slew Bearing Conic, with Spacers, parametric Design with Fusion 360 by TheGoofy Jun 13, 2017
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This variation of my other Slew-Bearing has spacer-elements between the rolls. Rolls have a conic shape.

The Fusion 360 model has parameters for the spacer size, and the gap between roll and spacer. In particular the control over that gap helps to tune the design for a perfect distribution of the rolls across the track. The outer trace is horizontally split into two halves.

My earlier design has the problem, that it is difficult to control the gap between roll and track, and the gap between two neighbouring rolls, because it's only a single parameter. Another problem is the control over the bearing diameter, which depends on the number of rolls and their diameter.

The STL-files attached to this project is a bearing with 12 rolls (8 mm diameter at the center), and 2 mm spacers. The spacers are split in an lower and an upper part for better 3d-printability. Their shape is identical - nevertheless I've exported them separately.

Related video (tutorial with cylinder rolls): https://youtu.be/5o4Fj8OxkB8

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0.15 mm layer works as well

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I believe that the .stl with 24 spacers is wrong, half of them should be mirrored.

I wonder if it is possible to apply an herringbone gear pattern to the connical rollers and the track/rings. If done right it seems that almost all the action would be rolling with minimal sliding and one wouldn't need spacers at all with the gear-rollers automatically staying in place. Of course they would have to be set in place correctly at the start. As long as the system didn't slip a cog it would seem to run smoothly, perhaps better than this setup or its ancestor. Of course it could not be made quite so small as these can, considering how wicked-complex of a design it would be. :-)

Good idea! That should be doable. The gear teeth wouldn't even need to be as high, because there is no torque. A pressure angle of 45° or higher might be even better to absorb the forces on the bearing.

Nice project and good accompanying video

amazing design

image #6 is the best part in the entire thing

awesome FDM optimzed model again! and your videos are also very well made und informative!
du wirst noch zum FDM superstar mit all den super Konstruktionen die du schon geshared hast, vielen Dank dafür und beste Grüße aus Tirol in die Schweiz :)

Great tutorial. Thanks.

Your tutorials are excellent. Can you offer any advice on getting more skilled with Fusion 360? I have been using it for a long time and it seems that a lot of features are well hidden. For example how to produce the engineering-looking CAD drawing (image 6)?

That's "inspect / section analysis", "inspect / component color cycling", and a sketch ...

Nice ! i was thinking about having a spacer for it ! Maybe you can also link them together with a ring connecting them, like the real ball bearings have.

i don´t know if was because the extrusion multiplier but te gap in the earlier desing its almost perfect.