Office Chair Base Movement
Office chair base movement issues are usually caused by loose connections of the gas lift rod, aging or failure of the gas lift rod, or damage to the caster/base components, and can be resolved by tightening accessories, replacing components, or performing cleaning and maintenance.
Loose Connection Between the Gas Lift Rod and the Base
If the base movement manifests as slight wobbling, it is necessary to first check the connection between the gas lift rod and the five-star base. Long-term use may cause the hexagonal fixing screws to loosen, which is evident from the presence of rotational clearance between the screws and the connection points. Solution: Turn the chair upside down, use an 8mm or 10mm wrench to fully loosen the screws counterclockwise, realign them, and then tighten them clockwise until there is no clearance. If the screw threads are severely worn (e.g., the threads are flattened or stripped), replace them with anti-loosening screws with rubber gaskets. These screws significantly enhance connection stability by increasing friction and preventing repeated loosening.
Aging or Failure of the Gas Lift Rod
Wear on the gas lift rod's seal ring is a common cause of base movement, resulting in abnormal lifting function or the seat slowly descending on its own. Detection Method: After continuously pressing the lifting rod 10 times, immediately leave the seat. If the seat descends more than 5 centimeters within 30 seconds, it indicates that the gas lift rod's self-locking function has deteriorated, and a new component is required. Purchase Considerations: The new gas lift rod must match the seat's fixing hole size (commonly 50mm or 38mm). It is recommended to choose a model with a hydraulic buffer, as this type of gas lift rod reduces impact through internal oil circuit design and extends service life.
Stuck Casters or Cracked Plastic Base
Stuck caster axles can cause the base to move with resistance or produce abnormal noises, while a cracked plastic base may lead to structural looseness. Maintenance Recommendations: Spray silicone-based lubricant on the caster axles monthly to remove entangled hair and dust. For nylon caster sets, use a toothbrush dipped in soapy water to clean the dirt in the wheel grooves. If cracks are found in the plastic components of the base, immediately fill and reinforce them with AB structural adhesive. Ensure that the adhesive covers the entire crack and extends to the surrounding area to prevent the crack from spreading to load-bearing structures. Note: If the crack has spread to the center axle of the five-star base or the connection point of the gas lift rod, the entire base must be replaced.
In daily use, avoiding violent lifting or frequent dragging of the chair can reduce component wear. Regularly checking the tightness of the screws and the flexibility of the caster rotation is key to preventing base movement.
