Ball Joint Arm BJ2010 system

Description

This arm is the central component of the BJ2010 system.

This system goal is to allow you to fix in the desired position and orientation any object compatible with this system.

The arm terminations have a simple squared shape with a hole for M4 bolts that allows to mount things at each end of the arm.

Other models part of the system

Additional hardware required
 

A few bolts are required to assemble the arm:

1 x 20 mm m4 bolt (hex head type) for the clamp adjustment 

2 x  20mm m4 bolt (socket head cap type), one for each spherical  arm termination 

3 x m4 hex nuts 
 

BJ2010 meaning

Some explanation is needed on the system naming since it will help makers to design
components for it.
BJ stands for ball joint
20 refers to the sphere diameter in mm
And 10 is the dimension  of the side of the square termination that allows different components to be assembled together. 
 

The arm was also designed to be assembled with m4 bolts.

For the moment consider this system as experimental because I've just released it and there are not yet many compatible accessories. 

limitations and (potential) improvements

I've only printed this arm in PLA and tested with small loads.

The current version (v2) is not capable to hold heavy object because the grip on the ball cannot provide enough friction. 
I have some ideas that I still have to test on how to improve the grip:
 

• use the finger tips of a pair of latex gloves to wrap the ball 
• redesign the clamp or the ball to have one or more oring inserts 
• wrap the balls in teflon tape

Please feel free to provide feedback and to design accessories for this system