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11. A vast improvement over original chair part

    Posted by Swamp Master in Florida on 14th May 2021

    As a large and heavy guy, most air-cylinder type chair adjusters fail in a very short time. I wish chair manufacturers offered a simple mechanical adjustment instead, but, like the computer industry, manufacturers seem to think 'new tech bells an whistles' will sell better. Anyway, I replaced the defunct original cylinder with the threaded chair lift cylinder and all is working much more to my liking, and will probably last far longer (already longer than the original air cylinder - too soon for full appreciation yet). Six stars for improvement, 4 stars cause I will wait for final analysis - so five (5) stars at this time.

12. Great Replacement Cylinder

    Posted by Adam on 22nd Jan 2021

    I bought this to part to replace a gas cylinder. It is more difficult and time-consuming to adjust than a gas cylinder, but it is a great replacement cylinder for a chair that rarely needs to be adjusted.

13. Quality Product

    Posted by Tommy R Crews on 12th Jan 2021

    It is a quality product, I am just sorry in did not fit my application.

14. Innovative Product

    Posted by RP Kurlak on 26th Sep 2020

    A very well done mechanical (jack screw) replacement for a gas cylinder. Product appears sturdy and made with quality. Because I am 6'7" tall I am using this replacement at its maximum extension. Seems to be holding up fine. Time will tell, but so far so good.

15. Great replacement for failing gas lift cylinders

    Posted by Brian Meifert on 24th Aug 2020

    Replaced the failing gas lift cylinder in my office chair with this screw lift instead. Works great and no more sinking and raising the chair several times a day. Wish I had found this sooner.

16. Great replacement for large persons

    Posted by Willy Mackey on 25th Jul 2020

    I changed to the screw type instead of cylinder due to no cylinders holding up. Works great no more hitting the floor .

17. Why aren’t theses on chairs in the first place?

    Posted by Doc on 11th Dec 2019

    After going through several pistons in ten years, I finally found this. The screw action of the spindle is more reliable and secure. No more sinking chair. I will be replacing all of my chair pistons in the house with these.

18. Chair Spindle Lift Cylinder- Threaded - 4.5" Travel - S3999-5 work as advertised.

    Posted by Unknown on 21st Sep 2019

    although radius of both ends of this product is a fraction smaller than the chair I am installing the product on, it works.

19. Finallly, A Workable Solution

    Posted by BenW on 5th Feb 2019

    Searched high and low for a screw-based chair cylinder and this one was the perfect fit, perfect solution

20. Great Product

    Posted by Unknown on 25th Mar 2018

    Great Product

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