More TPU Shock Absorber Bushings

This time, making some 3D printed TPU shock absorber bushings for a Mazda B2600 4WD pickup.
Rancho shocks used:
Front: RS980:
- Lower straight bushing: 40mm wide, 16mm ID
Rear: RS999202:
- Lower L3 hourglass 40mm wide, 16mm ID
- Upper L3 hourglass, 39mm+4mm spacer or 43mm wide w/ 4mm offset, 20mm ID
This worked out well as I needed to design the LS straight bushing for my center shocks. However, I would need to take those off my truck to press out those bushings, likely destroying them in the process. So this project gave me the option of using the brand new LS bushings to measure and test fit. With the split bushing design, its so much easier to install and remove these, no press or bolt setup needed.
I hadn't worked with the larger L3 hourglass bushings before, so this motivated converting my original Fusion 360 CAD file into OpenSCAD. Originally, I had hard coded all the dimensions into the L1 hourglass CAD file. But this time, I separated everything out into separate dimensions plus additional clearance parameters. It's so much easier to work with the OpenSCAD files because you can see all the parameters in one place. In Fusion 360, you have the user parameters in a separate dialog box that you can't see when working on the drawing.
I used the Zyltech TPU filament:
www.zyltech.co...
Shore hardness: 95A
3D Printer Files:
Original:
- www.thingivers...
New:
- www.thingivers...
- cults3d.com/en...
- www.printables...
I also added the B2600 specific SCAD variable lines in the Thingiverse page, not too hard to figure out.
If you make some of these bushings, post a comment here or on the Thingiverse or Cults3D site what filament you used and how they worked for you.
More to come, making custom metric sleeves for the TPU bushings...
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And as always, thanks for watching

[@The4Crawler]

I've added a link to the updated 3D parts files in the video description. This is all now in OpenSCAD format. This makes them easy to edit and modify as needed. If you do make some of these bushings, post up your results here or in the comment section on Thingiverse or Cults3D.
Expanding the original shock bushing design really was an eye opener. My original design was made with hard coded dimensions, for the most part. Moving that design into 3 different bushing types taught me how to make the design easier to modify. Also, learned how to make the bushings adaptable to compensate for 3D printing tolerances in a clean way. All of these improvements makes it so much easier to modify the OpenSCAD files to produce the desired part off a given printer.
For example, originally, I had the diameter, or actually radius, of the center hole. To that I would add in the clearance number. So a 5/8" hole would convert to a 5/16" (0.3125") radius to which I might add 0.01" to for clearance and end up with 0.3125". All fine and dandy until it's time to make a 3/4" or 16mm dia. hole and then you had to start all over, dividing in half to get the radius and then adding in the clearance.

[@DaStuntChannel]

Hey! I did print a few for mountain bike shock bushings and they seem to creep a bit, they get ovaled over time, is that your experience as well? 95A TPU