3D-Printed Click Pen

Requirements:

• Spring: 4-5mm diameter, 20mm±1mm length
• One drop of lubricant (mandatory)
• Standard G2 refill (compatible brands: PARKER, SCHNEIDER, SEMIRAMIS; 98mm length)
• Not compatible with PILOT refills (110mm length)

Print Specifications:

• Support-free printing
• Layer height ≤0.12mm
• Variable layer height recommended for speed/accuracy balance
• Provided 3MF file:
  • Print time: ≤2 hours
  • Material usage: ~16g

Assembly:

• Tool-free assembly
• Post-assembly lubrication required
• 1-minute break-in process (specific method in tutorial)

Test Validation:

• Printers: A1mini & H2D
• Materials: PLA/PETG (Basics/silk/matte verified)
• Optimal material: PLA Basics

Update: Added a new print configuration: Reduced thread clearance in barrel.

After retesting the original configuration, both PLA and PETG perform acceptably. However, some users report excessive thread looseness causing functional failure – an issue I've been unable to replicate. To address this, the updated configuration:

• Increases thread pitch diameter
• Decreases mating thread clearance

Tutorial:
Video Guide: (Break-in method at video end)

Step-by-Step:

1. Internal Structure Diagram

   

2. Internal Component Photo

   

3. Apply Lubricant: Small amount on blue surface (arrow-indicated)

   

4. Break-in Method:
   • Press and rapidly release button
   • Utilize spring recoil to eject button

   • Repeat 10 times

     

5. Functional Test

   

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The strength of 3D-printed knives cannot be guaranteed and they are suitable only for light-duty tasks, such as cutting paper or opening Amazon packages. Unless otherwise specified, all of my knife designs are intended for light-duty use only.

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