Looks like a banana. Twist it… and it becomes a full-size katana.
This is the Nanakatana XL, created after many requests for a longer version. After multiple iterations, both the external form and internal fit have been refined to achieve a satisfying balance between movement, strength, and reliability.
⚙️ Design Highlights
Extended XL Blade (75~80cm) A much longer telescopic blade that feels closer to a real katana.
Twist-to-Open Mechanism (V2 Evolution) The banana stem is rotated to unlock and open the peel cap, continuing the proven mechanism from Nanakatana V2.
Flick-to-Deploy Action Once unlocked, a simple flick allows the blade to slide out smoothly.
New Safety Lock System 🔒 Added based on user feedback. When fully closed, a locking tab prevents the stem from rotating, avoiding accidental deployment (e.g. when clipped on a belt). (Also… this is the Banana King’s sword. The lock is there to prevent excessive aura leakage 👀)
Included Katana Stand 🗡️ Also requested by many users. A dedicated stand is included as a separate print profile, allowing you to optionally print and display the katana.
Reinforced Structure Key components have been strengthened to better handle the longer stroke and repeated use, at the same time most of the infill set to 3-5% to use minimal material for the long sword without scarifies the structure strength.
🖨️ Print Tips
0.2 mm layer height recommended with adaptive layer height enable
Can be printed fully in PLA
For better durability:
Blade segments
Peel gear lever (white parts) → recommended in PETG
⚠️ Important – Dimensional Accuracy
On some printers (especially A-series / H-series), Dynamic Flow Calibration may cause parts to print slightly oversized, leading to tight fits.
👉 Suggested test:
Print peel cap gear and shaft first
If fit is too tight → try disabling Dynamic Flow Calibration
⚠️ Bed Adhesion
Some parts are tall and require strong adhesion:
Clean build plate with water + soap
Ensure first layer is solid before continuing
🧩 Print Setup
Designed to fit within 180mm build plate → Compatible with A1 Mini
Two-color design:
Yellow (outer peel)
White (internal structure)
Katana stand available in a separate print profile
🔧 Assembly
Assembly required.
I saw some comment saying support removal is difficult so I updates the support to look more obvious and easier to remove (20260417)
tear the support to side wat for easy removal and not broken the inner piece.
Do not force parts too much
Ensure proper alignment before pressing in
make sure to follow the instruction labeling for orientation
🧪 Tested & Verified
Successfully tested on:
Bambu Lab A1
Bambu Lab P1S
Bambu Lab H2D
Stable and repeatable when printed with proper settings.
please remember to CLEAN THE BUILD PLATE !!!!!!!!
💥 Experience
Noticeable “click” feedback at full twist position
Smoother deployment compared to previous version
Blade profile refined to feel closer to a real katana
💡 Final Notes
This is not just a bigger version — it’s a response to the community.
More presence. More control. More satisfaction.
💬
Boost MeIf you made one, I’d love to see it 👀 Feel free to share your prints or improvements! And if you enjoy the design, a boost is always appreciated 🙌
If u Like my fruity model, plaese have a look at the orange zone also, the Orange Candy Dispenser
YY the panjang
