New Pneumatic Gas Cylinder for Herman Miller Aeron Chair #1B08VM, Chair Lifting Accessories, Black.

This cylinder was a perfect replacement for my Aeron-C chair which developed a death wobble that finally got to be too much. Installation was easy using an 18 inch pipe wrench and 20 oz framing hammer. Did not need to use an extension on the wrench but did need to bear down to get it to break free from the seat. Removal from the base was easy enough, just a few good whacks with the hammer and the old cylinder dropped right out.I feel this replacement is good quality and should last based on the weight of the new cylinder, time will tell. I chose this one based on reviews for aeron chairs and not on price. No more wobble.

The OEM cylinder on my Aeron had finally reached its end of life. While it never failed outright, the sag - about an inch and a half - was becoming bothersome. After some shopping it came down to this vendor and another. This one cost a little more (and didn't include tools) but the reviews seemed to have a higher level of customer satisfaction. reviewers warned that it could be tough to remove the old cylinder, especially from older chairs. Mine's over 15 years old - I think you know where this is going. My son and I had the chair on its arms, upside down on a table - we alternated holding the chair and working the wrench. I began with some good penetrating oil. Channellocks (mine are two feet long!) wouldn't twist the post loose. Even with vise-grips holding the Channellock handles tight, all it did was gouge up the post. A foot-long pipe wrench didn't do it either. What did the trick was a standard-size crowbar extending from the post, parallel to the pipe wrench handle, secured to the pipe wrench handle with a chain-wrench. In other words, it took some SERIOUS torque to break that thing loose! On to the base. We started with a rubber mallet. Ineffective. Next, a two-pound hand sledge. Ineffective. What worked was a six-pound sledge with the base supported on a heavy workbench, a towel protecting the finish on the base, the cylinder protruding through a hole in the bench. One good shot with the sledge was all it took. Overall, getting that thing out was quite a bit of effort. The replacement cylinder was a perfect fit and required no adjustment whatsoever. The old sag is 100% gone and all is right with the world. Side story: I've had this chair serviced under warranty a couple of times over the years. (Herman-Miller's warranty is awesome!) Each time they sent a little old guy to my home, his little tool box and parts in hand. It would have made good YouTube fodder to see a little old guy struggle with this cylinder swap! Or maybe there's a secret trick I don't know about. Okay, so here's the simple wrap-up. If your Aeron needs a cylinder, this is the one you want. Forego the cheaper one that comes with 'tools' - there's no way they would have done the job, at least not for me. And I figure a less expensive part that includes extra stuff, well, costs have to be cut somewhere. And read the reviews. I don't know about you, but after all the effort it took to get my old cylinder out the last thing I want is a replacement that might not fit.

With the right tools and after reading these reviews, that install was a breeze! I had heard the war stories of having to fight with a pipe wrench to get the old cylinder unseated from the assembly, however, the approach with the 18mm deep socket and 2 lb hammer had it out in 3 swings.I have an Aeron classic from '06 so naturally I thought I'd be fighting against 17 years of stubbornness to get it out of that assembly. Fortunately it came right out with a few, well placed swings from above that cylinder head. Honestly I'm not sure why all the YouTube install videos still push the pipewrench narrative but in my opinion, the punch out method seems to be the most effective technique by a long shot. Much to my delight it was quite therapeutic as well.As for the new cylinder, Im 6' 3" and 205 lbs. It's a pretty stout resistance which I was delighted to find after sinking about 4 inches every time I sat down on the old one. This thing is solid and highly recommended to give any high mileage Aeron out there a much needed face-lift.Just wanna give a shout out to everyone in these reviews that gave a detailed breakdown of the disassembly because it 100% saved me a full day of heartache and head scratching!

My 1997 Aeron B Classic gas cylinder needed replacement. At first, thought I would need a new chair. After some research, realized that a total cylinder swap out was needed. Definitely worth going that route vs. trying to fix original cylinder with bearing/washer kit replacement kit. Its a fairly easy repair with the right tools. As others mentioned, remove the 5 spoke base. I hammered the bottom end of cylinder from the underside vs trying to mallet tap it out topside on the spoke base, idea not mar or scratch the base. Removing the top end of cylinder from the chair is a little trickier. I removed the mesh seat base which is pretty easy -- 4 screws -- and remove the plastic cover. From there set chair on workbench and used a socket to drive cylinder out from the top. Used a little Liquid Wrench before doing this. The alternate way for the top side cylinder removal is try to get a pipe wrench on the bottom side of the cylinder underneath chair and twist it out. Advantage is not having to remove the mesh seat base. But for my chair, this required so much torque to loosen that it wouldn't work. So as others have mentioned, going at it from the top side was the way to go. After a few hard blows with a ball peen hammer it came out. The new part itself is very stable, fit perfect on both ends, and actually raises the chair up a bit higher than the original. Wish I would have done this years ago!