I tend to use Ergotron arms for my monitors and pen displays.
Ergotron HX
Ergotron LX
For >=24" pen displays, I use the Ergotron HX. This is a very well designed and rugged arm. I use it with:
Wacom Cintiq Pro 27
Huion Kamvas 24 Pro 4K
Many 32" monitors
For ~22" pen displays I use the Ergotron LX. It's certainly not as rugged as the Ergotron HX, but it has been reliable and has a good range of motion.
The Ergotron HX has less wobble than the Ergotron LX, but still has some wobble.
Using a monitor arm with your pen display comes down to whether your pen display is VESA mountable.
If your pen display is VESA mountable, you can use a VESA compatible monitor arm.
If your pen display is not VESA mountable, there are some options
Smaller pen displays are about the size of a laptop, so you can try an arm designed to hold a laptop.
Here is an example: https://twitter.com/eyekoodraws/status/1596064399109726209
Here's some creative DIY solutions:
Wacom has designed an arm for their Cintiq line called the Wacom Flex arm that is specifically designed for their product. Not that this arm only works with specific Cintiq models.
Brad Colbow - Wacom Flex Arm Review Dec 10, 2018
If you already have a monitor arm you can use the Wacom VESA Mount for Cintiq 24 & 32 with it to mount those specific models.
Huion has a monitor arm which appears to be a rebranded version of a generic monitor arm.
r/Huion - Huion ST500 Desktop Arm Review 2024/05/31
This brand comes up a lot when people mention what arms they use, but I don't have any personal experience with them.
North Bayou F100A
I use this brand a lot.
My notes on Ergotron monitor arms
Ergotron - Install Ergotron LX Monitor Arm 2021/10/01
Ergotron - HX Monitor Arm Adjustments 2020/03/04
Ergotron - Install Ergotron HX Monitor Arm with Heavy-Duty Tilt Pivot or HD Pivot 2021/05/24
link: https://www.amazon.com/VIVO-Adjustable-Counterbalance-Free-Standing-Tabletop/dp/B074P7Y9ZG
I just ordered this in August 2024, so I haven't had time to use it yet. By September, I'll have some initial notes on it.
All monitor arms have some amount of wobble. Some have more and some have less. But NONE of them feel "rock solid"
One thing that will help reduce the wobble is if the bottom of the pen display rests on something like your desk.
If you want to have ZERO wobble you need to use a stand with your pen display.
There's a write up on using tablets that includes a section on a North Bayou arm here: https://www.asianjoyco.com/resources-tutorials/digital-sculpting-tools
