Replacement Hardware Repair Kit for Office Chair Gas Lift Cylinder - Includes Clip, washers, & Bearing - S4451-K

Nice replacement parts, easy to follow instructions. Worked great.

This item was a literal lifesaver. Took about 8 minutes to easily install on my Herman Miller Aeron Chair which I thought would need to be replaced entirely, but nope! Quick fix!

Saved me a whole lot of pain and expense. Easy to install with clear and simple instructions. Properly solved my bearing-based issue where my hydraulic cylinder was shooting into the floor.

after a decade OEM bearing exploded. this replacement was pretty easy and gets my chair functional again. if it doesn't last will replace whole piston next time.

I bought a chair off of Marketplace because I liked the retro cover on it, not because it "sat well." Been trouble since I got it home. I've already done work on cleaning it and reattaching the upholstery. It's probably 15 years old. So, the other day, a pile of what looked like greasy graphite appeared below it--under closer inspection, there were assorted ballbearings in the pile. What fresh hell...? A few YouTube videos helped me identify the problem and what I needed to fix it. The gas cylinder seemed to be fine but the uppy/downy lever never did work. I have a height I want--I would not be a person who takes it up and down figuring that out. Anyway, I was so glad to see this kit available--the delivery time was longer than I'd hoped for, but as it turned out, it came two days earlier than the earliest delivery time. Easy installation--however, it appeared that uppy/downy thing was letting it sit too low. Another Amazon find remedied that and now I am queen of the world! Thank you!!!

I have a newer DxRacer Classic series (which was their top of the line model when I bought it last year.) It produced a horrible clicking noise whenever I leaned back or sat down or move around in any kind of way. All within the 1st month of owning it. I contacted the authorized seller and they sent me a brand new reclining and gas cylinders unit (like 200 bucks in parts) and this pretty much fixed the entire issue. I didn't think about it again until last month about 1 year later... the dread clicking came back. I probably could have sent away for another gas cylinders replacement, but I knew this time around the clicking is caused by broken ball bearing washer (since this is widespread knowledge around the net now). My chair is extra big model so the gas cylinders is heavy duty (not normal size) this hardware repair kit is universal size so it fits both normal and heavy duty gas cylinders. When I popped the pin off my chair and remove the base from the shaft, loose ball bearings spilled out onto the floor. The rubber stopper washer was completely shredded. The only thing that survived was the 2 washers that sat on the top and bottom of the plastic washer bearing. I knew immediately the net was correct. This was the issue for the clicks. A couple of tips I can give you on installation. Have a long wooden dowel or some other long blunt object to pick out the bearings and junk stuck at the bottom of the wheel base cuff. I had bearings stuck in the grease and particulate matter everywhere along the bottom. I cleaned all that out with the dowel (just wiped the dowel off in a paper towel at each step) until everything looked silvery and clean at the bottom. Another tip is make sure you have bearing grease before you do this installation. It does not come with the kit. You do not want to put these bearings in without bearing grease all over the washers and bearing washer or you will just break it sooner. Keep in mind bearing grease is different from bearing oil (grease is what you need for this task). The repair was done within 10 minutes (would have been less if I didn't have to pick out loose bearings from the wheel base collar.) No there are no clicks or pops. The chair rotates around as flawlessly as it did when it was new. I likely will have to do this again in 1 year, but at least now I know how to fix my chair for 10 bucks. I hope this helps. Also, there does not seem to be any issue with that washer bearing being 10mm smaller in this gas cylinder than the bigger heavy duty one that came with the DxRacer chair.

This kit completely eliminated the noises my 5-year-old office chair had developed over the years. It's actually an upgrade, as upon disassembly I discovered the chair's original cylinder only had a plastic bushing and single metal washer rather than a thrust ball bearing sandwiched between two washers like this kit provides. Nonetheless, this kit fit perfectly and I'm 100% thrilled with the result!

If you need the washers, this is not the kit for you. I purchased this kit only for the clip that goes on the very bottom of the assembly and it is great. I read the previous comments that the washers are thicker than the OEM parts for the Herman Miller Aeron and for individuals looking to replace those parts, I can confirm that if you install everything included in this kit, you will not be able to fit the clip on the end; however, if you only need a couple pieces such as the rubber ring, ball bearings and/or clip, just use the OEM washers that you already have and everything will fit nicely. If you need those parts and need to replace the washers as well, there may be a trip to the hardware store in your future, but this is still a good buy for you. If all you need is the washers and nothing else, this is not the kit for youl; besides, you can get the parts you need faster and cheaper at a local hardware store.