Office Chair Installation Dimensions

The core dimensions for office chair installation mainly involve the matching and adjustment of key components such as the gas lift, base, five-star foot, and seat depth. Specific installation points and dimension ranges are as follows:

1. Dimension Matching Between the Gas Lift and Five-Star Foot
The gas lift is the core component for the height adjustment function of an office chair. Its diameter must strictly match the central hole of the five-star foot. During installation, insert the gas lift vertically into the central hole of the five-star foot, ensuring there is no wobbling or gap between them. If the dimensions do not match, it may cause the gas lift to tilt or fail to adjust in height normally, and even pose safety hazards. The diameter of the insertion hole in the five-star foot is usually designed according to the specifications of the gas lift, with a common diameter range of 40-50 millimeters. Refer to the product manual for specific details.

2. Fixed Dimensions Between the Base and Seat
The base is the key mechanism for controlling the height adjustment, rotation, and tilting of the seat. It needs to be fixed to the bottom of the seat with matching screws. The screw holes must align with the pre-drilled installation holes on the seat. Typically, M6 or M8 screws are used, with the torque controlled between 8-10 Newton-meters to avoid over-tightening that could damage the threads or under-tightening that could cause looseness. The thickness of the base is generally 20-30 millimeters, and it must be compatible with the bottom structure of the seat to avoid interference.

3. Connection Dimensions Between the Backrest and Seat
The connection between the backrest and the seat is usually achieved through metal brackets or plastic clips. Ensure that the connection points are aligned and firmly fixed. The hole spacing at the connection must match the backrest bracket, with a common hole spacing range of 100-150 millimeters. If screws are used for fixation, use the same specifications as those for the base and apply thread-locking compound to prevent looseness.

4. Seat Depth Adjustment Range
The seat depth (the distance from the front edge of the seat to the backrest) of an office chair directly affects user comfort. It can usually be flexibly adjusted within a range of 34-54 centimeters. The adjustment mechanism is located at the bottom or side of the seat, enabling stepless adjustment through sliding rails or clips. During installation, ensure that the adjustment mechanism operates smoothly without jamming and is fixed at the initial position (e.g., 34 centimeters), with subsequent adjustments made according to user needs.

Installation Precautions

• It is recommended to install from the bottom up: casters → five-star foot → gas lift → base → seat → backrest, ensuring that each step is firmly fixed before proceeding to the next.
• The gas lift must be inserted vertically to avoid damaging the internal seals due to tilting.
• All screws must be tightened to the specified torque to avoid safety hazards caused by looseness.
• The seat depth adjustment mechanism should be lubricated regularly to ensure smooth long-term use.