Office Chair Caster Frame

In the current market, office chair caster frames with steel frames paired with silent omnidirectional wheels are the mainstream design. Prices vary significantly depending on materials and functions, with some high-end models integrated into ergonomic chair support systems.

Mainstream Structure and Materials

The core structure of an office chair caster frame typically consists of two parts: the frame and the wheels. The frame is primarily made of reinforced steel, such as the steel frame used in Sihoo office chairs, which provides stable support and strong resistance to deformation, making it suitable for long-term weight-bearing use. Some low-end products may use plastic frames, but these are less durable and prone to breakage during frequent movement. The wheels, on the other hand, are standardly equipped with silent omnidirectional wheels, which reduce friction noise during movement and enhance steering flexibility through optimized wheel materials (such as PU coating) and bearing design.

Types and Functional Differentiation

There are various types of caster frames on the market, mainly divided into three categories:

1. Basic Insert-rod Type: Such as plastic frame silent wheel sets, which are directly fixed to the chair legs with insert rods. They are easy to install and inexpensive (approximately ¥0.48-¥20), but have limited weight-bearing capacity and are suitable for lightweight office chairs.
2. Spring-loaded Brake Type: Casters with brake functions, such as spring-loaded casters, use a spring mechanism to secure the chair and prevent accidental sliding. They are suitable for scenarios requiring stability, such as conference chairs, and are moderately priced (approximately ¥50-¥100).
3. High-end Threaded-rod Type: Such as Yanxuan 2-inch threaded-rod European and American casters, which use metal threaded rods for connection and are compatible with the adjustment systems of ergonomic chairs. They can be linked with the chair's height and tilt functions and are relatively expensive (approximately ¥100-¥200).

Factors Affecting Price

The price differences in caster frames are primarily determined by materials and functions:

• Materials: Steel frames with PU wheels are more expensive than plastic frames with ordinary wheels. High-end models may use nylon or carbon fiber wheels, further increasing the price.
• Functions: Caster frames with brakes, adjustable height, or integrated into ergonomic systems are significantly more expensive due to increased technical complexity.

Industry Positioning and Standards

According to the classification on the Baidu Aicai platform, caster frames belong to the category of office chair hardware accessories, alongside hinges, handles, and other components, and are standardized accessories. Their design must meet the collaborative support requirements of ergonomic chairs. For example, models like the SumLush Xia Muwu Fit CC, although not directly describing the caster frame structure, emphasize overall chair stability, implying that the casters must match the chair frame, gas lift, and other components to avoid重心偏移 (center-of-gravity shift) or structural looseness due to movement.