I learned to make ball hinges while I was designing a hand for my Servo Robotic Hand project. In this project, I will first make a Ball Hinge and explain how we can use it to make anything hinged with a hands-on on a Bat model that we will import or copy from the gallery. Things We Need Computer Internet Tinkercad account Creating Ball Hinge Use solid box from Basic Shape menu and change its dimensions to Length = 15mm, Width= 15mm and Heignt= 10mm. Use hole box(transparent), change its dimensions to Length = 5mm, Width= 15mm and Heignt= 20mm. Place this box into the solid box(Pic Align them so that the sold box forms a "C" shape after grouping both of them. Group both the boxes by selecting both the boxes and group them(Ctrl + G). Now drag a sold sphere to the workplane. From Shape Menu change it to Hole and its Steps to 24(this will give it a smooth surface). The diameter of this sphere will be 9mm(or L=9, W=9, H=9). Align this hole sphere in the sold C shaped box and gr...