Seat height adjustment

All our swivel chairs can be adjusted in seat height via a gas piston. It is tested and guaranteed for use by people weighing up to 150kg. It adjusts the height of the seat so that your thighs are parallel to the floor when you sit. This allows many of us to place our feet on the floor ensuring good circulation in the legs. If you find that a comfortable posture results in your feet not touching the ground then you should consider the use of a footrest for much if not all of the day.

Back height adjustment

The backrest can be altered in height to provide support to your lumbar region, ie lower back. This will help you to maintain a good posture and avoid back pain. On most of our chairs, the backrest can be raised and lowered by way of a ratchet. The user simply reaches behind them and lifts the backrest up one ratchet notch at a time. On our entry level chairs, the backrest can be adjusted in height by unscrewing a handwheel to allow the backrest to be manually raised or lowered.

Permanent Contact Backrest (PCB)

This entry level mechanism has a seat which is fixed in tilt and a backrest which is spring-loaded to move backwards and forwards in angle with the user. By raising the mechanism’s lever, you can alter the angle and then lower the lever to lock the backrest in any position from upright to fully reclined. Ideally, the lever should be left up for the backrest to follow the movements of your back.

Synchro Tilt

The seat is geared to tilt as the backrest changes in angle. This allows you to lean over your work with your body being fully supported at 90 degrees without your body becoming cramped thereby restricting your breathing and circulation and, consequently, reducing your concentration. The seat and backrest can be locked or, by raising a single lever, it is geared to move in a ratio of 2 to 1 to recline the backrest at a faster rate than the seat to open up the body angle to promote a reclined posture, a relaxed wellbeing and improved blood flow.

Dual Control / Independent Seat & Back

This type of chair offers all the benefits of the above synchronous mechanism but the tilting seat & reclining back have a separate lever control so they can be set in different positions independently of each other. The user can choose to lock or free float the chair’s movement to find an angle which best suits their activity. This chair tends to be chosen by users needing slightly more personalised adjustment than that offered by the synchronous version.

Knee Tilt

On executive chairs, conference room chairs and meeting room chairs it is usual for the seat and backrest to be fixed in angle with the facility on executive seating and certain conference chairs of a tilting action so you can recline in the chair. A knee tilt action is a variation of a tilting action in that it reclines from a front pivotal point instead of a mid-point. The benefits are improved comfort and overcoming the problem of your feet being lifted off the floor as normally associated with normal tilting chairs.

Sliding Seat

The mechanism allows the seat to slide backwards or forwards by 50mm to 60mm depending on the model thus altering the depth in relation to the backrest to accommodate varying lengths of thighs. Both the tall and short will benefit from being able to alter the depth of their seat. A useful guide is to ensure that the clearance between the edge of the seat and the backs of your legs should be at least three finger widths to minimise pressure behind your knees. The option is offered on most of our operator chairs.

Adjustable Lumbar Support

An optional cushion within the back of the chair can be inflated and deflated by means of a valve in a rubber bulb to offer additional lumbar support to the user. It helps to encourage a better posture and sufferers of back ache will gain benefit from altering the amount of lumbar support during the course of their working day.

Tension Control

This is either a knob on the underside of the seat or a turning handle to the side of the chair which allows the user to personalise the tension of the recline mechanism according to their individual weight or preference, thus increasing or decreasing the effort required to recline back and forth.

Anti-Kickback

Many of the mechanisms include a safety release mechanism which stops the chair backrest from springing forward as it is unlocked from a fixed position.