**3D printing bicycle handles**
The old bicycle handles became sticky (some kind of silicone rubber?) so I had to replace them. I could bought them, but then I would miss the opportunity to learn some more FreeCad.
Here is the final result: one pair of smooth and one pair of rigged handles printed with orange TPU:
There is 1 main part (for the smooth handle) or 11 main parts (for the rigged handle):
- one tall hollow cylinder
- 10 rigs
Steps:
- Open FreeCad, Select ‘Part Design‘ workbench, New Body
- Create new additive cylinder (d=30.4mm, h=115mm)
- Create new hole on the top side of the cylinder (d=22.3mm, depth=11mm, drill point=angled)
- Select bottom edge and top edge of the cylinder, create fillets for smooth edges
- Select inner side of the hole, create chamfer (to easy slip the hole on the metallic handle)
- Create new body (for rigs)
- Create new additive torus (the first rig), transform, move it to the correct position
- Go to Part workbench, scale the first rig on the z-axis (factor 2)
- Copy-paste the first rig 9x and evenly distribute it along the handle (transform, move on the z-axis)
- Select all, Union (in Part workbench)
- Select the newly created Fusion, export as .stl
12. Import .stl to Ultimaker Cura Slicer
13. 3D print settings:
- Material: Generic TPU 95A
- Layer height: normal
- Temperature: 228C
- Bed: 60C
- Fan: 5%
- Speed: 60mm/s
- Arc welder on
- No supports, brims
Send to Octoprint, wait 2 hrs, take timelapse meanwhile, done. Here’s the timelapse of the smaller, smooth handle:
Tags: #3dprinting #tpu #functional
https://blog.rozman.info/3d-printing-bicycle-handles/
Con 
I dettagli: 
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