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chairpartsonline

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

  • Based on 1,173 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Tuesday, Apr 21
Order within 19 hours and 49 minutes
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Features

  • Hardware repair kit for office chair gas lift cylinders
  • Contains: 1 Rubber Bumper, 1 Silver Washer, 2 Black Washers, 1 White Bearing Pack, 1 Retaining Clip
  • Attachment hardware for lower area of office chair gas lift pneumatic cylinder
  • These parts fit the large majority of standard gas lift cylinders in office chairs - Most but not all
  • Note: Gas lift piston in picture is for visual purposes only and is not included. Only the hardware kit is included.

Description

Useful for replacing or repairing worn out or missing attachment hardware on an office chair gas lift cylinder. Attaches the gas lift piston cylinder to the larger black or chrome support column that fits into the 5 leg chair base. Instructions for correct assembly included It is critical that this hardware set is installed in the correct order for proper & safe usage. Functional note: If your cylinder is sinking while sitting in the chair, the entire gas cylinder must be replaced as an internal seal has worn out. Parts note: Gas lift piston in picture is for visual purposes only and is not included. Only the hardware kit is included.

Brand: chairpartsonline


Color: Metal


Material: Rubber


Size: 7 inches x 4 inches x 0 inches


Item Weight: 0.04 Pounds


Brand Name: chairpartsonline


Recommended Uses For Product: Indoor


Room Type: Office


Age Range Description: Adult


Included Components: 1 Rubber Bumper, 1 Silver Washer, 2 Black Washers, 1 White Bearing Pack, 1 Retaining Clip


Surface Recommendation: Hard Floor


Indoor Outdoor Usage: Indoor


Model Number: S4451-K


UPC: 735201994666


Manufacturer: chairpartsonline


Unit Count: 1.0 Count


Additional Features: Fits Most Standard Gas Lift Cylinders


Furniture Base Movement: Swivel


Reclining Position Count: Not Obtainable


Tilting: No


Is Customizable?: No


Is Foldable: No


Color: Metal


Style Name: Modern


Pattern: Solid


Finish Types: Chrome


Shape: Cylindrical


Arm Style: Armless


Furniture Finish: Chrome


Leg Style: Straight Leg


Size: 7 inches x 4 inches x 0 inches


Item Weight: 0.04 Pounds


Item Depth: 7 inches


Item Dimensions: 4 x 7 inches


Material Type: Rubber


Frame Material Type: Metal


Product Care Instructions: Wipe Clean


Seat Material: Rubber


Fill Material: Rubber


Required Assembly: Yes


Maximum Weight Recommendation: 300 Pounds


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Apr 21

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • All you need & sturdy parts
Nice replacement parts, easy to follow instructions. Worked great.
Reviewed in the United States on January 6, 2026 by Marcy
    • PERFECT!!
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!!! ... show more
Reviewed in the United States on January 15, 2025 by Thrilled2Pieces
    • Fixes the DxRacer "Clicking" Issue
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. ... show more
Reviewed in the United States on May 17, 2017 by Bruno
    • simple fix for expensive chair
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.
Reviewed in the United States on February 28, 2024 by Erin Lind
    • Good product
I have been using my restored broken chair for a few months now, and the repair kit has held up just fine! It saved me plenty of money since I was able to repair an otherwise very good chair!
Reviewed in the United States on February 12, 2026 by Long Time Customer
    • Fantastic product!
This item is amazing. It's cheap, of good quality, fits an Aeron chair perfectly, works very well, and is easy to install. Buying this can save you over a hundred dollars over hiring a technician.
Reviewed in the United States on April 7, 2026 by Disgruntled
    • Another Easy Fix Found Via Google, Worked Great!
I googled when the shock shot through the bottom of my Aeron, because at first I thought it was end of the line for my chair. Found replacement shocks, but as far as I could tell, the shock seemed fine, just it wasn't being contained in the 'sleeve'. Finally found this kit and ordered it. Got here fast, pretty easy instructions, except no instructions for actually removing the shock, but that's ok, I figure it's a somewhat generic kit. Five-ball bearing matched the one already inside, perhaps my chair was fixed before? Somebody thought the OEM bearing was a six-ball affair. I used an online video detailing how to replace the whole shock, and since mine seemed pretty tightly installed, I ended up scarring part of it with my pipe wrench before I realized there was no reason to remove the whole thing, just get the base off, which I had to use some severe rubber malletting to do. I think some of the broken rubber pieces had gotten well jammed in there, but it eventually came off. Here's the video too though: [...] Also, clean things up very well before installing the kit. When I got done, my chair sank properly using the side handle but would not rise. I reopened it, cleaned out the 'naughty bits', and it now works fine! Thanks for a $12 fix (including shipping at the time) for a $500 chair! ... show more
Reviewed in the United States on April 12, 2014 by Blaine DeLancey
    • No more creaks & pops from my office 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! ... show more
Reviewed in the United States on November 28, 2025 by R. Helzer

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