Base Chassis for Office Chairs
The base chassis is the core supporting component of an office chair, directly affecting comfort and safety during use. It comes in various types with a wide price range, and installation must follow standardized procedures.
I. Main Types of Base Chassis
Tray-Type Chassis
- Aluminum Alloy Tray: Primarily made of aluminum alloy, it is lightweight and corrosion-resistant, suitable for scenarios requiring frequent height adjustments, with prices typically ranging from ยฅ25.0 to ยฅ47.0.
- Rotating and Lifting Chassis: Integrates rotation and lifting functions, enabling height adjustment through a gas spring or mechanical structure, suitable for users of different heights, with a price range of ยฅ30.0 to ยฅ45.0.
- Butterfly Tray with Handle: Designed with a butterfly-shaped structure and equipped with an operating handle, facilitating single-handed adjustment of the tilt angle, suitable for scenarios requiring reclining for rest, with prices around ยฅ18.0 to ยฅ35.0.
Footrest-Type Base
- Electroplated Five-Star Footrest: Features a five-claw star-shaped design, with electroplating enhancing surface hardness and wear resistance, offering strong load-bearing capacity, with prices ranging from ยฅ30.0 to ยฅ53.2.
- Thickened Swivel Chair Components: Enhances structural stability through thickened steel or engineering plastics, suitable for heavier users, with relatively lower prices around ยฅ13.16 to ยฅ28.0.
II. Factors Influencing Price Differences
The price of a base chassis is significantly influenced by material, functionality, and design complexity. For example, aluminum alloy trays are generally more expensive than plastic trays due to higher material costs; rotating and lifting chassis are pricier than basic fixed chassis due to the integration of gas springs or mechanical structures; electroplated footrests are more expensive than ordinary painted footrests due to process complexity.
III. Installation Specifications and Precautions
- Installation Position: The chassis must be fixed to the center of the underside of the seat plate to ensure even force distribution and prevent chair wobbling or damage due to misalignment.
- Fixing Method: Use the provided screws (usually M6 or M8 size) to pass through the reserved holes in the chassis and seat plate, tighten with an electric screwdriver or manual wrench, with a recommended torque of 5-8Nยทm to prevent loosening or over-tightening.
- Function Testing: After installation, check whether the rotation, lifting, or tilting functions work properly, ensuring no gas spring leakage, no mechanical jamming, and no gaps between the chassis and seat plate.
IV. Purchase Recommendations
Choose the appropriate type based on usage scenarios and budget: For office settings, prioritize rotating and lifting chassis with electroplated five-star footrests for a balance of adjustability and durability; for home use, consider butterfly trays with handles and thickened components to balance cost and comfort. Ensure compatibility between components and chair models before purchase to avoid installation failures due to size mismatches.
