Hey, I thought I have the same issue with this, but after taking it apart and seeing how it works, I see it is actually not supposed to move that piece where you were focusing your camera back and forth, in fact that piece is entirely disconnected from the mechanism and is only spring loaded. It actually slides up and down the entire support mechanism on the bottom section of the support bracket - causing it to tension up. Check the bottom as you rotate your +/- wheel and make sure it is moving up and down, max up and max down should be about 4-5 inches of movement which causes the entire system to stiffen up for stronger support. I took it apart entirely to verify its functionality. I hope this helps.

I think it is normal because my newly purchased Aeron (received a week ago) is like that also.

Had wondered this myself … 🧐

The sales guy just explained to me that is how it should be.

It's normal. The fact that your able to easily push it back with your finger means your back will have an easier time as if there was no resistance at all

Can you remove that part?

Hi guys! Is there anyone wo has lombar herniatic disc l4/l5 and used this chair? What can you aay about it??

I just bought one and I was wondering the exact same thing, since you've been using the chair for a longer while than me, do you feel the lumbar support works?

per herman miller rep, when you max out the knob, even forcing it slightly tighter will potentially break the mechanism...so if you've done that..there's a chance you've broken it

Normal

This is normal, it should be like this.

Is broken. Return it under the 12 year warranty

It broken