These files are provided for PERSONAL USE ONLY
The BBHAMMER is a a compact 3D printed repeating crossbow ballester for 12mm, 15mm and 17.2mm (0.68cal ) balls with a quick exchangeable magazine .
The crossbow can be powered by bow arms or rubber bands and equipped with different attachments, foregrips and shoulder stocks.
Differnt materials for the balls can be used like wood, plastic or steel.
Bow arms with up to 130lbs have been successfully tested with recommended filament (PLA+) and print settings.
The design is optimized for a 300mm x 300mm print bed.
Building instructions are included.
Hardware needed for the build is shown in Images.
The assembly is easy but requires some mechanical understanding and accuracy!
Some videos I found of Martin Scherzer who already built the BBHAMMER.
Thanks for sharing this!
https://www.youtube.com/shorts/UDzgXQleHJ0
https://www.youtube.com/shorts/74RnIOtoteg
https://www.youtube.com/shorts/PrbDhwjYKCs
Important notes -> read this before start ing!
- Before start ing, making and using this device, make sure it is legal for your age and in your area / country!
- I do not assume any liability for damages or injuries of any kind - use at your own risk!
- I am not responsible for the consequences of building, possession and using this device!
- The arch or rubber used is at the discretion of the builder and will have a significant impact on power and can affect the legal issibility of the construction!
- The material for balls used is at the discretion of the builder and will have a significant impact on power and can affect the legal issibility of the construction!
YOU build it,YOU use it and YOU own it on YOUR own risk and responsibility!
and
- Always keep it under lock when not in use and don’t leave it unattended when it is in use!
- Keep it away from children and people who will not handle it responsibly!
- Protect yourself by wearing safety goggles and protective clothing!
- Do not shoot or aim at animals or people!
- Use an archery mat or backstop to avoid ricochets or other damage!
- The reliability of this build depends on your own building skills and the quality of the printed parts you created!
- Shoot only in designated and secured areas - never in public or unauthorized areas!
These files are provided for PERSONAL USE ONLY. It is prohibited to share or redistribute these files or any derivatives / remixes, or to use them for commercial purposes, including selling the printed models.
2024/01/08 - Update 1.2
Added building option for 17.2mm balls (0.68cal)
2023/10/25 - Update 1.1
Added building option for 12mm balls
FAQs
Here a couple of regular questions, I answered in my previous designs:
Q: Will there be a version for small printbeds?
A: No - simply difficult due to the given structure of the design
Q: Will you publish the construction data or single step files?
A: No
Q: Do you sell printed models?
A: No - I'm just a designer having fun in deg new things
Q: Can I use this model for commercial use?
A: No - I designed this for fun and for the 3d community
Q: What can I do to improve accuracy?
A: Described in the building instructions
Q: Are there building instructions included
A: Yes
Q: What is needed to build this one?
A: Hardware kit is shown in images of this design
Q: Where to buy balls, bow arms, screws, springs etc.?
A: Amazon, eBay etc. - pls take a look yourself - there are so many dealers...
Q: Problem with Cults or how to buy?
A: Please Cults directly - I'm just the Designer...
Q: What ist the max dimension of the bow arm and what bow arm do you recommend?
A1: The max cross section dimension for a bow is 12mm width x 22mm height - max tested bow arm 130lbs
A2: Any bow arm witch fits to the max dimensions and max tested lbs
Q: What filament to use?
A: I personally prefer SUNULU PLA+ - cheap, easy to print and good for mechanical constructions
Q: Will you other ball sizes in the future?
A: Will see - maybe in the next updates...
Q: Why use rubber around the bow arm?
A: It's to fix the bow and to absurb the energy
