Olivo & Groppo Gamma office chair
Gamma office chair by Olivo & Groppo. A chair with a simple style yet characterized by its durability and compact size. It offers excellent value without compromising the essence of the chair or the user's needs. The permanent contact mechanism allows for the tilt and height adjustment of the backrest via a knob. The synchro mechanism is activated by a button, and the backrest, which can be adjusted in height while seated via an up-and-down mechanism, features an anti-shock mechanism.
Dimensions:
-
HIGH BACKREST
cm:
L. 70
L. session 48
P. 70
H. 90/102
H. sitting 42/54
(H. armrest "OPTIONAL" 62)
Optional:
- UNDER-SEAT MECHANISM: Permanent Contact or Synchro
- ARMRESTS: fixed in black polypropylene or height-adjustable in black nylon with black PU top
- BACKREST: high
- BASE: Black Nylon or Polished Aluminum
- WHEELS: Braked, braked and rubberized, "RING" braked and rubberized


Characteristics:
SYNCRO MECHANISM
Backrest internal structure in PP with 20% fiberglass. Rear cover in black PP. Padding in fireproof polyurethane foam cut from a block, density 25 kg/m3, thickness 30 mm. Seat internal structure in beech plywood, thickness 10/11 mm, pressed and heat-curved. Seat cover in black PP. Padding in fireproof polyurethane foam cut from a block, density 40 kg/m3, thickness 40 mm. Fixed armrests in black PP. Adjustable armrests with button operation from 2D to 5D, in PA6 nylon with 30% fiberglass or in polished die-cast aluminum, all with soft PU tops.
a) Permanent contact steel mechanism with protective casing. Backrest adjustable in height, tilt, and depth via a knob. Swivel plate in pressed steel with a 3 mm thick deep-drawn cone, painted with black epoxy powder.
b) Synchro mechanism + two-lever slider in pressed steel, 4 locking positions, 18° backrest tilt, 11° seat tilt, anti-shock safety system for the backrest and spring tension adjustment for calibrating the tilt via a knob. Seat slider with return spring with 70 mm travel and 6-position locking via a lever. Support for height adjustment of the backrest from the seat in steel, 6 mm thick, with up & down mechanism, 75 mm travel and 9 adjustment positions. Fixed armrests in PP, black. 5-star base in PA6 nylon with 30% fiberglass, black, ANSI-BIFMA certified. Ø 50 mm braked nylon casters.
FOR FINISHES SELECT TECHNICAL DATA SHEET
Available upon request: 5-star base in polished aluminum with all types of wheels available for this model, 3D, 4D, 5D adjustable armrests.