Office Chair Screws and Wheels

Key information about office chair screws and wheels is as follows:

Office Chair Screws

The assembly of an office chair typically requires the cooperation of various types of screws. Common types include 7 coarse screws and 6 short screws (fine screws). Coarse screws are generally used to connect load-bearing structures such as the chair seat with the chair legs and backrest, requiring high strength. Short screws (fine screws) are mostly used to fix non-load-bearing components such as armrests and adjustment devices.
Currently, the specific sizes of hexagon socket screws (such as M4, M5, etc.) are not explicitly mentioned in publicly available information. However, hexagon socket screws, with their flat heads and smooth surfaces after installation, are often used in scenarios where screws need to be hidden or space needs to be minimized (such as the connection between the chair back and the chair seat). If you need to determine the size, it is recommended to obtain it through the following methods:

1. Consult the product manual: Regular manufacturers will mark the screw specifications and installation positions.
2. Measure existing screws: Use a vernier caliper to measure the thread diameter (e.g., M5 indicates a nominal diameter of 5mm) and length.
3. Contact after-sales service: Provide the chair model or pictures to obtain official accessory information.

Office Chair Wheels

Wheels are the core components for the mobility of an office chair, and their selection requires comprehensive consideration of size, material, and function:

• Size: Common specifications range from 1.4 inches to 3 inches (1 inch ≈ 2.54 cm), with larger sizes offering greater load-bearing capacity. For example, 1.5-inch wheels are suitable for light-duty office chairs, while 3-inch wheels can bear over 200 kg and are suitable for industrial or heavy-duty scenarios.
• Material:
  • Plastic wheels: Low cost but poor wear resistance, and prone to scratching floors.
  • Nylon wheels: High strength and better wear resistance than plastic, suitable for carpeted environments.
  • Polyurethane wheels: Quiet, with good shock absorption and strong floor protection, making them a common choice for homes and offices.
• Function:
  • Swivel wheels: Can rotate 360°, offering high flexibility.
  • Fixed wheels: Only move forward and backward, providing strong stability, often used in scenarios requiring a fixed direction.
  • Brake wheels: Equipped with a locking function, suitable for scenarios requiring temporary fixation (such as medical chairs).

Purchase recommendations: If you need to replace the wheels, first confirm the size and axle hole diameter (such as 11mm or 12mm) of the original wheels, and then select the material and function according to the usage environment. For example, for wooden floor environments, it is recommended to choose polyurethane quiet wheels, and for carpeted environments, nylon swivel wheels can be selected.