MingYi.office Heavy Duty Gas Cylinder Replacement for Herman Miller Classic Aeron Chair, Class 4 TUV

This China aftermarket gas cylinder for Aeron was EASY to install, fit perfectly and worked immediately upon installation. I DID have an extremely difficult time removing the original HM cylinder from the chair. It had been there for decades. The online videos made the removal look way easier than it was. It took a number of overnight WD-40 soaking, the biggest heaviest pipe wrench I could get and a LOT of aggression in numerous sessions to incrementally move that old cylinder a few millimeters at a time. When it finally came out, the new one slipped in like a charm, what a surprise, it was a good quality purchase. The chair being an original HM Aeron would cost close to $1K to replace...and was a Great Incentive to put up with the hassle.

It's been almost a year and my very expensive chair is still working as good as new. I work from home so every single day I'm at my desk for 8-12 hours. This has stood the test of time. I watched videos as to how to remove the older parts (that was hard part), and this installed perfectly. My desk is higher than normal and I got a model that extends further and I am so happy I did. This is definitely worth every penny, especially since I don't have to spend $800-1200 for a new chair!

25 year old Herman Miller Aeron chair that's done right be me all this time finally gave up the ghost a few days ago, the cylinder extended to its full height in its dying gasp and wouldn't go down and when I sat down on it I wobbled around disconcertingly. Being uneducated about the cylinder replacement I tried to force it down until it ended up all the way down and wouldn't go back up, laugh. I watched the replacement videos and thrilled to the prospect of using my large pipe wrench for the second time. New one arrived and boy the reviews and testimonials about removing old crusted cylinders was really spot on in my case. It took WD-40 and multiple angle attempts, I think I finally did it by pulling the wrench towards me like I was rowing! Once that was done, and knocking out the old cylinder from the legs with a hammer it was an easy peasy replacement. Note, remember to take off the protective tip on the new cylinder so you expose the green part. I had to adjust the set screw as others have w/ a 5/32 hex wrench, I didn't have to take off the seat I just popped the shroud off and wrenched it from the back. Now I'm back in business with my old war-horse. Will it be another 25 years? We'll see. Recommended. (j4.)

The cylinder doesn't drop down into the base as far as the original, so it does sit a little high. I would say it's still usable for 5'10" and above. Also agree that the original is difficult to remove, so consider using some WD-40 and letting it sit for a bit before attempting the pipe wrench, which you absolutely will need. There are no threads, so you can turn the cylinder either direction. After you drop this product into the chair's base you will want to be sure you have taken off the black plastic cap, which should reveal the green tip that goes into the bottom of the seat. Once together, if the chair goes up and down without moving the lever, you will need to loosen the set screw which will require an allen key. For this you need to remove the plastic cover under the seat. One half turn was enough for me.

Works great and did not need to purchase directly from Herman Miller Manufacture.

This was a perfect fit to fix my broken Herman Miller Aeron size B office chair.

its simple enough to install and utilize however in 3 months the piston is useless. It sinks no matter what height is set.

Use the biggest pipe wrench you have to remove it from the chair base. To remove from the wheeled portion, just tap out with a hammer. I've bought 3 of these with no problem.

I am updating this as I had left a scathing review. After about three weeks it seemed like it was collapsing when someone say in it. Ends up I had to tweak the height adjuster screw just a bit out and it is all good again. Right now would buy again

On arrival this gas cylinder looked excellent. Well packaged and arrived quickly. Instructions were almost non-existent - "go find a YouTube video...." - and no mention of the tools you would need (a pipe wrench and a solid, non-damaging mallet). However, I overcame these obstacles quite easily and managed to get it swapped over. My original chair gas cylinder for my Herman Miller Classic Aeron Chair has lasted from 2004 until 2023 and took a bit of effort to remove, but I got it removed and replaced it with this and made the necessary adjustments so it worked perfectly - hooray! After just 2 days I noticed the chair felt a little wobbly from side to side and front to back. Everytime I move in the chair it feels more unstable. The photo shows where the top part of the wider section of the cylinder seems to be coming away from the main section, and this is what is causing the wobbling. The video shows the actual extent of the problem, with the top part rocking from side to side, and this is getting worse every day and I'm sure will eventually break away completely. I'll be returning this and buying something else.

سعر مميز وانصح فيه

Perfect fit for aeron classic

Muy buen pistón. Quedó perfecto en la silla, sube y baja sin problema. Se mantiene a la altura, prácticamente como si la silla estuviera nueva. La verdad es que reviví una super silla. La instalación requiere mucha fuerza para quitar el pistón original, sobre todo si es que tiene muchos años como en mi silla que tenía más de 15 años con el pistón original. Colocar el pistón es bien fácil y solo bastaría ajustar el nivel del botón para habilitar la palanca para subir y bajar. Nada que no puedas hacer, hay videos en YouTube que te guían para hacer el cambio