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844 / 844F

This synchro mechanism derived from the 834 model adds the slider function to the 3-position seat adjustment system.Also available on FREE FLOAT version.


    Tilt: 21°
    Automatic stop search
    5 locking positions using a button
    Safety antishock system
    Tilt: 9°
    Work position: 0°
    Additional forward adjustment of the seat angle in 3 positions: 0°, 2.5°, 5° (844 version).
    Free float seat angle lockable in two positions: 0°, 5° (844F FREE FLOAT version)
    Seat slider with return spring with a 60 mm seat stroke and 5 locking positions using a button
    Distance between seat holes: 153×200 mm
    Distance between back-bars connection holes: 3 holes 40×40 mm, 4 holes 25×40 mm
    145 mm forward pivot point
    Different main springs are available to fit different users size
    Slider button on the left
    Seat slider button on the slider plate
    Plastic seat slider





    • EN1335-3:2000 par. 7
    • ANSI-BIFMA X5.1 - 2002/5
    • ANSI-BIFMA X5.1 - 2002/11
    • ANSI-BIFMA X5.1 - 2002/16


  1. Turn the lever for chair height adjustment
  2. Push the button once to lock the swing
  3. Push the button once again to release the swing
  4. Turn the handwheel to adjust swing intensity
  5. Push the button inside to release the seat slider
  6. Release the button to lock the seat in the first available position
  7. Turn the lever to adjust seat tilt up to 0°, 2,5°, 5°
    (844 version) Turn the lever for seat free swinging mode (844F FREE FLOAT version)

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