Office Chair Wheel Brake

Answers to questions about office chair wheel brakes are as follows:

I. Vulnerable Components and Maintenance

1. Brake pad fixing screws: Frequent movement of the office chair can easily cause the screws to loosen or be lost, leading to brake failure. It is recommended to regularly check the tightness of the screws. If any are missing, replace them with screws of the same specification in a timely manner and avoid using inferior substitutes.
2. Brake friction pads: These come into direct contact with the ground, and the wear rate is significantly affected by the ground material. Hard floors (such as tiles and concrete) cause faster wear. When the thickness is reduced to half, new pads need to be replaced. When replacing, clean up any residue to ensure a tight fit between the new pad and the brake mechanism.
3. Bearings: Dust accumulation or insufficient lubrication can cause abnormal noises (such as a 'squeaking' sound). Regularly clean the bearings and add silicone-based grease. Avoid using oily lubricants (which easily attract dust). If the bearings are severely worn, they need to be replaced as a whole.
4. Return springs: After long-term use, the elasticity decreases, resulting in the inability to automatically return to position after braking. Replace with springs of the same specification. Pay attention to the direction during installation to ensure that the spring can smoothly return to position after compression.

II. Selection of Brake Wheel Types

1. Wheels with brake locking function: They usually have a diameter of 60 millimeters and are equipped with a silent sleeve and a soft PU outer layer. They are suitable for solid wood floors (reducing scratches). The operation is simple (pull down to lock and pull up to unlock). The combination of 5 wheels provides high stability, making them suitable for scenarios that require frequent movement and fixation.
2. Gravity wheels: They increase the lateral resistance through an internal mechanism. More force is required for movement, but the noise is relatively low. They are suitable for scenarios with high requirements for silence and low movement frequency (such as conference rooms and libraries).

III. Price Reference and Purchase Recommendations

1. Economical options:
   • 2-inch PU silent wheels (50mm with brake): ¥2.5 per piece, suitable for light office chairs.
   • 1-inch load-bearing PP universal wheels: ¥1.43 per piece, suitable for small stools or lightweight furniture.
2. Mid-to-high-end options:
   • 3-inch nylon wheels with brake: ¥3.3 per piece, with stronger load-bearing capacity, suitable for heavy office chairs.
   • Gravity self-locking universal wheels: ¥3.0 per piece, combining silence and automatic locking functions. When making a purchase, note: Select the wheel type according to the weight of the chair, the ground material, and the frequency of use. Give priority to products with brake functions and wear-resistant materials (such as PU and nylon).

IV. Usage Precautions

1. Avoid long-term use on uneven ground to reduce abnormal wear of components.
2. Regularly clean the wheels and the brake mechanism to prevent dust or debris from getting stuck.
3. Avoid sudden braking or violent dragging when moving the chair to extend the service life of the components.