Electrode holders for ground glass joints
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A collection of adapters for holding (standard) electrochemical electrodes in ground glass joints.
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Model information
- Source
- Printables
- Category
- Chemistry & Biology
- License
- Creative Commons — Public Domain
A collection of adapters for holding (standard) electrochemical electrodes in ground glass joints. A common use for this would be to hold electrodes for lab scale H2 production or for potentiostat electrochemical measurements inside a multi headed flask with ground glass joints.
There is a few different models for different sized glass joints: 14/20, 19/26, 24/29, and 34/35. If you require other dimensions it's a quick change in the openscad code, use the following table as a reference:
| Designation | Top diameter [mm] | Bottom diameter [mm] | Height [mm] |
| 7/16 | 7.5 | 5.9 | 16 |
| 10/19 | 10 | 8.1 | 19 |
| 12/21 | 12.5 | 10.4 | 21 |
| 14/23 | 14.5 | 12.2 | 23 |
| 19/26 | 18.8 | 16.2 | 26 |
| 24/29 | 24 | 21.1 | 29 |
| 29/32 | 29.2 | 26 | 32 |
| 34/35 | 34.5 | 31 | 35 |
| 40/38 | 40 | 36.2 | 38 |
| 45/40 | 45 | 41 | 40 |
| 50/42 | 50 | 45.8 | 42 |
| 55/44 | 55 | 50.6 | 44 |
| 60/46 | 60 | 55.4 | 46 |
There are 3 major types available in this set:
-regular ones with a single hole trough the middle, this ones work for most standard electrodes and electrode holder, due to printing tolerances it is recommended that the hole is about 0.4mm larger in diameter than the actual size of the electrode (so say a diameter of 6.4mm for a 6mm electrode)
-threaded ones have an internal thread. This is sometimes useful for reference electrodes. The ones currently available in our lab have the (somewhat unusual) G 1/8 thread, so the code and models are adapted for those. You can easily change to a different thread by changing the parameters of the ScrewHole function (https://github.com/rcolyer/threads-scad)
-split are especially useful when dealing with electrodes that have a varying diameter. They work by being pulled straight apart from the centre. Sliding them up and down can brake the object due to its conical shape.
Due to it's high resistance to caustic chemicals and UV light I recommend you print this objects using ASA filament. Some SLA materials would likely work even better but have not yet been tested.
For printing the regular and split objects normal Prusa settings work fine:
- 0.4mm nozzle
- 0.2mm layer height (SPEED)
- 5 layers top and bottom
- 3 perimeters
- 25% infill
- I used brim, but it might not be necessary
The threaded ones need smaller height (0.1mm if possible) and work best with a 0.25mm nozzle but a 0.4 will also work in a pinch.
- 0.25mm nozzle
- 0.1mm layer height
- 10 layers top and bottom
- 5 perimeters
- 25% infill