This is one of the most common questions we received over the years and it’s no wonder because many users assume that the chair should be totally silent for forever.
Having a little sound is natural and inevitable from the metal to metal contact or as the plastic frame flex. Some parts of the chair could really create noise easily, like the seat or pivot links, the plastic covers for the gearbox, etc. Lubricant can only reduce some friction and noise from contact abrasion, not totally. If it’s a rather new chair, the lubrication may be setting in, and noise will usually get lesser as the lubrication spread. If it’s an old chair, get some silicone grease(Not WD40 or similar!) and apply at the joints. The old application could be wearing off or gunked up with plenty of dust. Different model, age or version of the chair may have a different condition, it’s hard to pinpoint one common part or expect all to sound the same. Of course, it also depends on other matters like the user’s weight. Also, the chair being used in a quiet and enclosed room may make the sound more noticeable than in an open area.
Some parts of the chair are designed to be loose, so the chair can have its full finesse for its ergonomic features. These loose parts may inevitably create some noise as they knock or rub against the contacts. Since those are part of the design, nothing could be done. The wheels can also produce unnecessary noise. This can come from the stem that connects the casters to the chair, the internal rotary component or the surface of the wheels. For the stem, the new design from the German hard floor casters should reduce noise by a lot with its modified design, but not totally. If dirt or dust gets caught in the wheel, then friction is likely to increase along with noise. Last is for hard floor casters, it has a polyethene coating that promotes adhesion to the floor. In some cases, it can get too tacky with certain flooring and creates some noise. Or it can happen when strong cleaning agent gets in contact and somehow deteriorate the surface’s condition.
There’s really nothing a technician can do to make it absolutely or forever silent. Noise normally comes from parts that move. It’s hard to be totally silent with so many moving parts to get its ergonomic features and that’s probably the reason why noise is not covered in the warranty. Despite that, in almost all cases we have seen over a decade, we have not seen any functional failure, we suggest users not to overthink of the little noise that may appear.