I am removing this model from MakerWorld because of Bambu Lab's anti-consumer business practices. It can now be found on Printables, and any future updates will not be posted here on MakerWorld. https://www.printables.com/model/1167555-bolt-pen The same print profile will be uploaded there so you should be able to download it and open it in Bambu Studio or Orca Slicer with no issues. I strongly recommend using the profile from Printables as it will always be the most up to date version of it. Any profiles available here on MakerWorld are not my own and may not include the correct print settings or be up to date. I apologise for any inconveniences this may cause.
Clip Update Out Now!
New deep carry pocket clip option for all models
Features:
Smooth and elegant bolt-action design.
3 models:
Standard which uses a Pilot G2 or similar refill (140mm total length)
Mini which uses a Parker-style refill. (127mm total length)
Micro which uses a G2 Mini refill. (110mm total length)
Stylish spiral-shaped grip.
Deep carry pocket clip option.
4 different options for how far the tip of the refill sticks out of the pen (the amount varies depending on the refill used):
#2: 2.5-3mm
#3: 3.5-4mm
#4: 4.5-5mm
#5: 5.5-6mm
Easy to print with minimal supports needed.
No glue required: only a refill and spring.
Simple assembly process with minimal parts.
All parts except for the pen body are interchangeable between models.
Filament:
I used Polymaker's Polylite Clear PETG for the pens in the cover image and Polyterra Matte PLA for the pens in the other photos. While it looks great, I found the matte filament too fragile near the bolt area, due to poor layer adhesion. I would instead recommend PETG as it proved to be much stronger and more durable in testing. Regular PLA may also work well but I have not been able to test this.
Print Settings:
0.15mm layer height
3 walls
0.4mm nozzle (may benefit from 0.2mm)
Tree supports
Arachne wall generator
Auto brim
Assembly:
The assembly process is identical for all models. You’ll need the correct refill for the model your using, along with a spring. You will need the correct spring for the model your using too. If you printed one that specified a G2 spring, make sure you have a G2 spring. If not, any spring with around a 4mm diameter should work. Note that spring length affects tension; if the tension is too high, use a shorter spring or cut one down.
During assembly, you’ll also need something long and slim, like a pencil, to help align the parts.
Note that the bolt mechanism should become smoother with use.
Change log:
Clip Update (28/1/25)
New deep carry pocket clip option for all models.
Micro Update (1/1/25)
New Micro pen size which fits a G2 mini refill.
Redesigned cap thread for easier, support free printing of the end cap.
Changes to parts of the description that were incorrect or no longer applied due to the update.
Note that the print profile and .stl files from previous versions are still available should you need them.
Spring Fix V2 (16/12/24)
The last spring fix failed to resolve the issue where the Pilot G2 spring wouldn't fit in the pen. This should now be resolved. I have added a 3rd plate to the print profile which includes the standard sized pen, that now fits the G2 spring (plate 3). For any other spring you should still use the non-G2 spring version (plate 1). Note that the mini sized pen (plate 2) will fit any spring including the G2 spring.
Spring Fix (20/11/24)
changed diameter of spring area from 4.9 mm to 5.1 mm to accommodate pilot g2 spring (Standard Pen).
change spring area length from 6 mm to 6.5 mm to accommodate slightly longer springs (Standard & Mini Pen).
SC3DPrints
