Uploaded January 2026 | Updated September 2026, 2 weeks ago
In my previous video, I tested 3D printed open-end wrenches, and many of you asked the same question:
👉 What about the other side — the box-end?
So in this video, I test 3D printed box-end wrenches using the same test method and directly compare the results with the open-end designs from the previous video.
I also tested several new polycarbonate (PC) filaments in open-end form, based on your requests in the comments.
I originally expected the box-end wrench to be much weaker — especially when copying traditional metal designs — but the results turned out very differently than I thought.
At the end of the video, I also try something new:
instead of copying a metal wrench, I experiment with a box-end design optimized specifically for 3D printing to see how much strength can be gained this way.
🔗 Previous video – 3D Printed Open-End Wrench Test:
youtu.be/b2a1h-bc2Zw
☕ Support the channel
If you like these kinds of material and strength tests and want to support my work, you can do so here:
👉 Patreon: patreon.com/mytechfun
👉 Buy Me a Coffee: buymeacoffee.com/mytechfun
Thank you — it really helps keep these tests going!
STL from the video: printables.com/model/1440810-wrench-set-8mm-19mm
⏱ Chapters
0:00 About previous video (open-end wrench)
2:55 Polycarbonate (open-end)
3:30 Box-end wrench testing
6:56 All results
7:20 Stronger box-end design
8:38 Final thoughts
#3DPrinting #3DPrintedTools #BoxEndWrench #OpenEndWrench #PolycarbonateFilament #PCFilament #StrengthTest #MechanicalTesting #ToolTesting #Engineering #MyTechFun
In my previous video, I tested 3D printed open-end wrenches, and many of you asked the same question:
👉 What about the other side — the box-end?
So in this video, I test 3D printed box-end wrenches using the same test method and directly compare the results with the open-end designs from the previous video.
I also tested several new polycarbonate (PC) filaments in open-end form, based on your requests in the comments.
I originally expected the box-end wrench to be much weaker — especially when copying traditional metal designs — but the results turned out very differently than I thought.
At the end of the video, I also try something new:
instead of copying a metal wrench, I experiment with a box-end design optimized specifically for 3D printing to see how much strength can be gained this way.
🔗 Previous video – 3D Printed Open-End Wrench Test:
youtu.be/b2a1h-bc2Zw
☕ Support the channel
If you like these kinds of material and strength tests and want to support my work, you can do so here:
👉 Patreon: patreon.com/mytechfun
👉 Buy Me a Coffee: buymeacoffee.com/mytechfun
Thank you — it really helps keep these tests going!
STL from the video: printables.com/model/1440810-wrench-set-8mm-19mm
⏱ Chapters
0:00 About previous video (open-end wrench)
2:55 Polycarbonate (open-end)
3:30 Box-end wrench testing
6:56 All results
7:20 Stronger box-end design
8:38 Final thoughts
#3DPrinting #3DPrintedTools #BoxEndWrench #OpenEndWrench #PolycarbonateFilament #PCFilament #StrengthTest #MechanicalTesting #ToolTesting #Engineering #MyTechFun
