Prevents your u-lock from being stolen while you are ridingPrevents your u-lock from being stolen while you are riding

• A mount for u-locks on bikes
• Optimized for rigid FDM printing
• Accounts for bowden tubes at adjustable angles
• Created in OpenSCAD
• All settings adjustable in the GUI using the OpenSCAD customizer
• Provides a lot of settings to fit on your bike and lock

Fork me on Github
Imported from Thingiverse
Version 2.3 of my very first 3D model. I started working on it in 2013 and advanced it ever since then
Images don't represent the latest version of the model (which is more rigid than older versions)

Instructions

What you need

• A bike and a u-lock (well, that's obvious)
• A 3D-Printer (probably you wouldn't be here otherwise)
• 8 equal screws (should be a bit longer than twice the thickness of your print - I recommend 10 - 20 mm)
• 8 equal nuts fitting your screws
• recommended: two small pieces of bike inner tube to prevent the lockholder to slip back and forward on your bike's top tube

How to build it

1. Measuring
   • Measure the diameter of your bike's top tube (or another round tube where you want to mount the lock). In order to use a piece of inner tube to prevent slipping (recommended), add around 2 mm or two times the average wall thickness of the inner tube to that value
   • Measure the diameter of your u-lock. As you will later slide the u-lock through the holder, measure the thickest area of the u-part of the lock and add a little slack.
   • Measure the diameter of your nuts*. Measure the flat size (look here: Wikipedia: Nut, measure A/F)
   • Measure the diameter of your screw's thread
   • Measure cables running above or below the top tube - also try to measure their position (the angle)
2. Download and open customizable_lockholder.scad and open the file in OpenSCAD.
3. Make sure to use the Customizer (Windows//Customizer)
4. Adjust the settings to your measurements and taste
5. Select the part you want to export (to attach a u-lock, you need two Top Parts and Two Bottom Parts or a Complete Lockholder Set
6. Render and export an .stl file and load it in your slicer
7. Print it (you are on your own with this step)
8. To mount the printed parts, use the screws and nuts. The offset between the two lockholders can be determined easiest when you fix one lockholder on your bike and slide the lock through it.

 * if you were laughing at this point, grow up