Ultimate MTB Fork Top Cap Socket for 1/2" Drive

This is a socket tool designed for MTB suspension fork top caps (RockShox, Fox, etc.). The default 24 mm size fits a RockShox Judy (I will add profiles with other dimensions on request). It's been in my toolbox for several years now.

Recommended Print Settings

• Orientation: 1/2" drive side down on the build plate
• Walls: minimum 5
• Infill: minimum 50% Cubic or Gyroid
• Top/Bottom: minimum 2 mm
• Seam Position: random (to avoid creating a structural weak point)
• Supports: no (sacrificial layer)
• Material: PLA (Solid), PETG/ASA (Heavy Duty)

⚠️ CRITICAL: SNUG FIT!

3D print material is softer than your fork's top cap. To prevent displacement of the print material under torque, the fit must be perfectly snug! If there is any play, the socket will definitely fail. So before printing the full tool, do the following:

1. Test Print: Lower the model in your slicer so only the first 2 – 3 mm of the hex socket is above the build plate.
2. Verify: The fit of the test ring must be perfectly tight with zero play.
3. Adjust: If needed fine-tune the model by scaling it uniformly in the slicer.

 ❗AFTER THE PRINT❗

To enable printing without supports, this model features a built-in sacrificial layer just after the drive hole. This layer must be punctured (preferably with a drill bit or simply a screwdriver) before the socket can be used with a 1/2" ratchet drive.

Engineering & Geometry

The geometry of this model is not to be pretty but purely functional. The walls are at specific angles to maximize layer adhesion and distribute torque stress across them.

🚨 IMPORTANT LIMITATION 🚨

Please note that this is a 3D-printed plastic tool. Do not expect this socket to withstand torque exceeding 25 Nm! Applying excessive force beyond this limit will most likely result in tool failure.