Common Knowledge of Office Chair Casters You Need to Know
Time：Aug 14,2025
Office chair casters, as a core component of the support system, directly affect the user experience. Common casters on the market are divided into two categories: flat and embedded. The former is directly fixed to the bottom of the chair legs with screws, while the latter is embedded inside the chair legs through buckles. Nylon casters are suitable for hard floors, rubber casters are more friendly to wooden floors, and PU material has both quietness and wear resistance. The diameter of the casters is usually between 5-7 cm. The larger the diameter, the easier it is to push, but the stability is relatively reduced. Casters with brake function are divided into two mechanisms: overall locking and single-wheel locking. The overall locking fixes all casters simultaneously through the bottom dial, which is suitable for design positions that require long-term fixed positions; single-wheel locking only controls the rotation of a certain caster, which is more common in medical care seats. Industrial-grade casters can bear a weight of up to 150 kg, while ordinary office chair casters have a standard load-bearing capacity of 80-120 kg. Overload use can easily cause deformation of the ball bearings and cause abnormal noise. When installing casters, pay attention to distinguish the forward and reverse thread directions. Counterclockwise rotation is mostly the disassembly direction. It is recommended to apply silicone-based grease to reduce friction when using new casters for the first time. Avoid using cooking oil to avoid adsorbing dust and forming sludge. In composite flooring environments, priority should be given to soft TPE casters. Products with a hardness of 60-70 degrees can protect the floor and ensure smoothness. Casters with anti-static function are common in laboratory scenarios, and the surface resistance value needs to be controlled within the range of 10^6 - 10^9.9Ω. Ball bearings and needle bearings directly affect the service life. The former is suitable for daily office use, while the latter is more pressure-resistant. Regularly check the wear of the ball grooves, and replace them in time when there are obvious depressions or rolling jams. Special-shaped casters such as star-shaped and claw-shaped designs mainly enhance grip and are suitable for use in sloping environments, but are more difficult to clean. When encountering casters that do not rotate smoothly, they can be disassembled and cleaned with WD-40 rust remover to remove the hair fibers entangled inside the bearings. Silent casters are not completely silent. International standards require the rolling noise to be less than 30 decibels. During the test, pushing the seat at a distance of 3 meters without interfering with normal conversation is considered qualified. Some high-end casters use a double-row ball design, which increases the load-bearing capacity by more than 30% compared to the single-row structure. If you encounter floor scratches, do not replace the casters immediately. First check whether there are gravel and other hard objects mixed in the wheel surface. Cleaning the wheel grooves with a soft brush can often solve the problem. When purchasing, pay attention to the thickness of the caster bracket. Steel plates above 1.5 mm are more durable. Quick-release casters are easy to install, but their stability is slightly inferior to screw-fixed casters. Quick-release models can be given priority for conference chairs that are frequently moved. Some brands provide a stepped design, and the mesh structure can effectively block thread lint from entering the bearing. Casters in many places use treads with alternating deep and shallow patterns, which can be used on both carpets and hard floors, but the rolling resistance is about 15% greater than that of dedicated casters. It is recommended to deep clean every quarter for the maintenance cycle, and use cotton swabs dipped in alcohol to wipe the center of the shaft. For seats that are not used for a long time, the casters can be removed and stored upside down to avoid deformation of the rubber material due to one-sided pressure. Be sure to replace the casters as a whole set. Mixing new and old casters can easily cause uneven force and accelerate damage. If the caster bracket is deformed, forced use may scratch the floor. The bracket should be corrected with a rubber hammer or replaced with a new bracket in time. Special environments require targeted selection and matching. Anti-corrosion casters are mostly made of 304 stainless steel and are suitable for chemical laboratories; high-temperature resistant casters use special rubber and can work continuously in an 80℃ environment. Finally, remind consumers that casters below 20 yuan are mostly made of recycled plastic, and their load-bearing capacity and durability are difficult to guarantee. It is recommended to choose regular products that have passed quality certification for office places.
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