Office Chair Sliding Base

Problems with the sliding base of an office chair can be resolved through targeted repairs or component replacement. Common causes and handling methods are as follows:

I. Loose Connection Between the Pneumatic Rod and the Base

If the connection between the pneumatic rod and the five-star foot becomes loose, it can cause the base to slide or wobble. Inspection Method: Turn the chair upside down and observe whether there is any rotational clearance in the hexagonal fixing screw at the center of the five-star foot. Repair Steps:

1. Use a wrench of the corresponding size (usually 8mm or 10mm) to fully loosen the screw counterclockwise;
2. Realign the connection holes between the pneumatic rod and the base to ensure they are vertically aligned;
3. Tighten the screw clockwise until there is no wobbling. If the screw threads are worn (e.g., stripped), replace it with a locking screw with a rubber washer to enhance friction and prevent secondary loosening.

II. Aging and Failure of the Pneumatic Rod

After prolonged use, wear on the internal seals of the pneumatic rod can lead to a decline in its self-locking function, resulting in the inability of the seat to bear weight steadily or a gradual sinking. Simple Inspection Method: Continuously press the lifting lever 10 times and then immediately leave the seat. If the seat sinks more than 5 centimeters on its own within 5 seconds, the pneumatic rod needs to be replaced. Replacement Precautions:

1. Size Matching: Measure the diameter of the fixing hole on the seat (common sizes are 50mm or 38mm) and purchase a pneumatic rod of the same size;
2. Functional Upgrade: Prioritize models with hydraulic buffering devices, which can reduce lifting impact and extend service life;
3. Installation Safety: When replacing, use professional tools to fix the bottom of the pneumatic rod to prevent high-pressure gas from spraying out and causing injury. It is recommended to have the replacement carried out by a professional.

III. Daily Maintenance Suggestions for the Base

1. Caster Cleaning: Spray a silicone-based lubricant on the caster axles every month to reduce friction. If the casters are made of nylon, use a toothbrush dipped in soapy water to clean the hair and dust in the wheel grooves to prevent jamming;
2. Crack Repair: If cracks are found in the plastic components of the base, immediately fill and reinforce them with AB structural adhesive, focusing on the edges of load-bearing areas to prevent the cracks from expanding and causing breakage;
3. Load Limit: Avoid overloading (usually, the maximum load capacity of an office chair is 100-120kg). Overloading can accelerate wear at the connection between the pneumatic rod and the base.

Tip: If the base sliding problem is accompanied by abnormal noise or lifting jamming, it may be due to air leakage inside the pneumatic rod or damage to the caster bearings, requiring further inspection or contacting after-sales service for repair.