Office Chair Mechanism

Office Chair Mechanisms Explained

The way in which different chair mechanisms work is often the source of much confusion. We have tried to simplify this information using small line drawings which are explained below:

	Fixed back mechanism The seat will go up and down, the back rest will go up and down and in and out, but you can’t change the angle of the back rest.
	Permanent contact mechanism The seat will go up and down, the back rest will go up and down and in and out, and you can fix the angle of the back rest or leave it free floating – in permanent contact with your back!
	Asynchro mechanism The seat will go up and down, the back rest will usually go up and down, you can fix or free float the back rest and fix or free float the angle of the seat – independently of the back rest. This lets you find the perfect position to use a computer – even tilting forwards!
	Lock-tilt mechanism A single lever lets you adjust the seat height up and down and lock or unlock the tilt of the chair. These mechanisms can either be locked in an upright position or left to free float with the user. They all have a torsion control knob to adjust to body weight.
	Synchro mechanism The seat will go up and down and you can fix or free float the angle of the seat and back rest together – usually in a ratio of 2:1, so for every one degree the seat tilts, the back rest tilts two degrees. The easy way to find a comfortable position! You can even adjust the torsion control knob to match your body weight. (All of our synchro mechanisms have an ‘anti-shock’ facility which means you aren’t thrown forward when the mechanism is unlocked – reassuring to know if you are drinking coffee at the time!)
	Multi lock mechanism The multi lock mechanism is similar to the lock-tilt mechanism but allows you to lock the chair in any one of five positions and can be fitted to the Mombasa Manager, Monaco fabric and leather, Grand Slam fabric and leather and Small Slam Gas fabric and leather.

	Knee tilt mechanism A twin-lever mechanism, the right lever allows you to adjust the seat height up and down and the left lever can be used either to lock the chair in any one of five positions or to tilt with the user. The pivot point is found towards the front of the seat so that your feet remain on the floor when tilting backwards. A torsion-control knob can be adjusted to user body weight and a non-return facility prevents the user from being thrown forward when the mechanism is unlocked.
	Stackable chair This model of chair is designed to be safely stacked on itself to a maximum of the number shown.

Online Shop System