Quick detach SecretLab Chair armrest brackets

Have you ever been discouraged to sim race or play guitar on your SecretLab chair when you realized you will have to take out 6 long bolts to detach the armrests, and then bolt them back up once you're done? I know that I have.

Be discouraged no more with this mod!

This addition to your SecretLab chair does not degrade it's design in any way, and adds a quality of life feature.

With this mod, for each armrest you are only going to need to loosen 5 grub screws - takes about 15 seconds total. 

I use this mod on a 2020 SecretLab Titan - it should probably work on any SecretLab Chair as long as it's armrests' metal plates have the same width as the ones in the previous chairs, and if the holes for bolting them up are in the exact same place. (I will be leaving a step file in case there are differences - you may even adjust the files to fit different office chairs! Feel free to post a remix)

As for the strength of the brackets - I mean, unless you are going to be sitting on the armrests, then there should be no issue - I as a 70kg guy can do dips on them, and they do not even bend, so you should have no issues (as long as you print with provided settings). 

Hardware required for a single armrest:

• Button head M8x20mm bolts - x3
• M8x8mm Grub Screws - x5
• M8 Nuts - x5

You need button head bolts for bolting up the brackets to the chair, as they provide the necessary clearance for the armrest plate to fit in the bracket hole. There's a chance that low head bolts could also work - haven't tried though.

Settings:

• 6 walls should be enough - You don't need to go full walls, but the more you put the sturdier the brackets will be
• 50-60% infill - You don't want hollow space inside the parts, but above 60% you get diminishing results

You can of course adjust these settings to your liking, but keep in mind that the brackets need to be quite strong, and compromising their strength to get a shorter print time is a bad idea. I used PETG, but I suppose PLA can also work - no idea about ABS, but I suppose you'd need to account for shrinkage.  

Printing orientation:

Assembly:

The brackets offset the armrests down by about 10mm, if that's an issue for you - I have provided 3D printable offsets that you can put inside the armrest's assembly (see picture) - it will put the armrest higher - you are going to need longer M6 bolts to reach the armrest's threads though if you decide to use that mod. 

My armrest plates are ~57mm wide and ~5.8mm thick. If it turns out that your plates are very different to that (to the point of not fitting in the “LessTightFit” version or being too lose in the “TightFit” version) please let me know - I will provide STLs that will fit your version (you can also do that yourself with the STEP file but it'd be great to have the files available to the public in this repo)

There are two versions of the brackets in the files section - TightFit and LessTightFit.
I myself use the tight fit version - but that's only because I don't want to waste filament on printing the less tight ones, as I created the less tight version once I had the tight fitting brackets printed already. 
The hole in the tight version is 57.2mm wide, and 6.62mm high, while the looser one has an additional 0.4mm of wiggle room in the width and 0.2mm in height
Due to a difference in printer tolerances (or even the armrest plate tolerances) the tight fit version might be looser (or tighter) for you than it is for me - but in my case one of the brackets is almost impossible to take out, and probably is going to need grease applied to it to be able to slide out. If you want to avoid that I strongly advise you to print the less tight fit version, the armrest is not going to wiggle once the grub screws are tightened anyways, and you will save yourself the hassle of taking out a stuck armrest.

UPDATE: Someone asked me if they can use thumb screws instead of grub screws for easier access - yes, absolutely, and I have no idea why I didn't think of that myself. The model doesn't even need changing. Swap grub screws for thumb screws and you are good. Your thumb screws have to be M8x12mm at minimum, but you can use longer bolts and it will not be an issue, as 12mm thumb screws are not easy to find, at least where I live. 

UPDATE 10.07.2025: After 6 months, one bracket broke after I put my whole weight on it by accident - in short, more infill, but 6 months of pretty much 8 hours of daily use - I say it's strong as hell!