Giá đỡ hàn - Tay thứ ba có đế nam châm

This flexible third hand is the perfect extension for the Soldering Station.

The actual arm is made by giufini from his Thingiverse profile. You should definitely take a look at his brilliant designs.

Because I use a metal sheet as the base for the soldering station, I redesigned the foot and inserted a magnet into it.

I used a crocodile clip as the head. The diameter of the end was 5mm. I then simply drilled out a joint, heated the end of the crocodile clip and pushed it in. 

Of course, all heads from giufini's PCB Workstation can also be used.

Print Settings and Assembly:

Parts:

Material: PETG and Ninjaflex TPU
Support: No

I used the BS_Joint_thick_coated.stl from Thingiverse for the arm. I printed this 25 times.

Disc magnet Ø 15.0 x 3.0 mm - can hold up to 2.9 kg

Assembly:

The head of the joint should be covered with shrink tubing. 
Diameter Ø: 9 mm, shrink ratio: 3:1 with glue worked well for me.
Make Magazine has written an article about it.

Simply press the magnet into the base arm.
And then push the TPU_Base_Plate arm into the base. This requires quite a lot of pressure, but it will hold without glue.

pro tip:
If a joint keeps coming loose, you can heat the "clamp part" with a lighter and gently press it together.