Office Chair Scratching Floor
The issue of an office chair scratching the floor may be caused by problems with the gas lift, base, or casters, and requires targeted troubleshooting and resolution.
Gas Lift Issues
Improper adjustment or aging of the gas lift is a common cause. If the seat height is set too high or too low, the exposed part of the metal rod may directly rub against the floor, especially when it remains at the extreme height for an extended period. Aging gas lifts may exhibit issues such as seal failure, internal air pressure leakage, or valve sticking, leading to abnormal seat height reduction and the base edge touching the floor. Solutions: Immediately adjust the seat height to the middle position and observe whether the scratching phenomenon disappears. If adjustment is ineffective, check the bottom of the gas lift for wear and add a nylon gasket for cushioning. If the gas lift is severely aged (e.g., leaking air or sinking), replace it with a new one that meets safety standards.
Base Deformation
The base may tilt and touch the floor due to impact deformation or material degradation. Low-cost chairs often use thin steel or low-quality plastic bases, which are prone to twisting and deformation under long-term weight, causing one side of the base to press down on the floor. Loose screws at the connections can also exacerbate base tilting. Solutions: Use an Allen wrench to check and tighten all screws on the base to ensure a secure connection. If the base is severely deformed (e.g., visibly bent), replace it with a double-layer steel base that meets BIFMA certification, which offers better load-bearing capacity and deformation resistance. Avoid sitting in a tilted position on one side during daily use to reduce uneven stress on the base.
Caster Issues
Loose casters or materials unsuitable for the floor surface can indirectly cause scratching. Loose casters can change the chair's support points, forcing the gas lift to bear greater pressure and accelerate sinking. If the casters are entangled with hair or threads, rolling resistance may cause the base to touch the floor. Hard plastic wheels (e.g., PP/PU hard wheels) rolling on wooden or tiled floors for an extended period may scratch the surface due to trapped sand particles. Solutions: Regularly clean the caster axles to remove entangled debris. If the casters are loose, adjust or replace the fixing screws. Replace hard plastic wheels with soft PU wheels (polyurethane-coated wheels), whose outer soft material reduces friction with the floor and lowers the risk of scratching. Lay carpets or floor mats at the points where the casters contact the floor for additional cushioning.
Prevention Tips: Regularly inspect the condition of all components of the office chair and avoid rough use. Choose products that have passed safety certifications, prioritizing steel bases and soft casters. For wooden or tiled floors, consider using carpets to extend the chair's lifespan and protect the floor surface.
