I designed a full-size 3D-printable baseball bat. I used an M8 threaded rod inside to make it stronger, and it worked 🤩. I’ve already tested it with some 3D-printed TPU balls, and I think it will also work with tennis balls. With the hardware inside, the bat weighs around 900 grams and feels solid in the hands.

Time for printing: ~12h 30m

Material usage(PLA): ~730g

Checkout the tests and assembly:

Components:

• Baseball bat parts
• Pin connectors

• Threaded M8 rod  - 830mm 

  

• Simple M8 nut

• Wingnut M8(You can also use simple nut if you have keys to screw it)

  

• M8 Washer