Screw Installation for Office Chairs

The operating steps and precautions for screw installation during the assembly of a Deli office chair are as follows:

I. Screw Installation for the Seat Base

When installing the seat base, first insert the screws into the pre-drilled holes in the base, then place the seat surface and secure it. A total of 8 screws are required for the base. During installation, strictly align with the direction indicated by the arrows on the components to ensure the screws are properly aligned with the holes. If the screws are not fully inserted or are misaligned, the seat surface may be unstable, leading to wobbling or abnormal noises during subsequent use.

II. Screw Installation for the Backrest

Two key screws are required for backrest installation. The steps are as follows:

1. Initially secure the backrest to the chair back frame and adjust the backrest angle to a comfortable position by gently bending it;
2. Use a screwdriver to tighten the two screws, securing the connection between the backrest and the frame.
   Note: Avoid applying excessive force when adjusting the angle to prevent deformation of the screw holes. After tightening the screws, double-check that the backrest is secure and free from looseness.

III. Compatibility of Screws with Components

Pay special attention to the compatibility of screws with chair components during installation:

1. Wheel Replacement: If replacing the wheels, ensure that the shape (e.g., round, square) and size of the wheel axles perfectly match the socket holes. Incompatible axles may cause installation difficulties or wheel detachment, affecting the chair's mobility stability.
2. Screw Type: Deli office chairs typically use hex socket screws to secure components, but specific sizes (e.g., M4, M5) should be referenced from the product manual. Mismatched screw sizes may result in poor fixation or damage to the component threads.

IV. Screw Specifications

The specific dimensions of the hex socket screws used in Deli office chairs are not explicitly mentioned in publicly available information, except that multiple screws are used to secure the components. For precise dimensions (e.g., length, diameter), the following measures are recommended:

1. Consult the installation manual included with the product, which usually specifies screw sizes and installation order;
2. Contact Deli's official customer service or manufacturer and provide the chair model for technical support;
3. If screws are lost, take the old screws to a hardware store for comparison and purchase to ensure consistent specifications.

Summary: When assembling a Deli office chair, follow the steps for screw installation, paying particular attention to the direction of the 8 screws on the base, the angle adjustment of the two backrest screws, and the compatibility of the wheels with the screws. If specific size information is lacking, prioritize consulting the manual or contacting the manufacturer to avoid installation failures or safety hazards due to mismatched screws.