Office Chair Screw Repair

Office chair screw repair requires targeted measures based on specific issues. Common situations and handling methods are as follows:

1. Loose chair screws
If screws become loose due to long-term use or vibration, they should be tightened first. Before operation, confirm the screw specifications. Common metric specifications are M4, M5, and M6, with M6 often used at the connection point of the gas lift in ergonomic chairs. The most accurate way to determine the specification is to remove the old screw: Use calipers to measure the outer diameter of the thread (approximately 6mm indicates M6), or directly take the old screw to a hardware store for comparison and purchase. When tightening, use a screwdriver that matches the screw's slot type (such as Phillips or flat-head) to avoid slipping.

2. Repeatedly loosening screws
If screws continue to loosen frequently after being tightened, it indicates that the screw hole or thread is worn, resulting in insufficient friction. In this case, wrap 2-3 turns of Teflon tape (plumber's tape) around the screw thread before screwing it into the hole. The tape fills the thread gaps, increases friction, and prevents loosening while avoiding rust caused by direct metal contact. If the screw hole is made of plastic, you can use nylon cable ties or hot-melt adhesive for filling to enhance the fixing effect.

3. Stripped screws

• Slightly stripped: When the screw slot is not completely worn, place rubber sheets, thin cloth, or tape inside the slot to increase the friction of the screwdriver and try to unscrew it; or apply metal screw adhesive (such as Loctite 243) and let it dry before fixing (note that such adhesives require heating or a special solvent for removal after curing).
• Severely stripped: If the screw head is exposed, use vise grips to clamp the screw shank and rotate it counterclockwise; if the screw head is an internal hexagon and has been stripped, cut a new flat-head slot on the head and use a flat-head screwdriver to unscrew it. The final solution is to replace it with a screw of the same model, ensuring that the length and diameter of the new screw are the same as the original to avoid damaging the screw hole.

4. Broken chair back (related to screw issues)
If the chair back breaks due to a broken or loose screw, first repair the chair back structure (such as welding the metal frame or reinforcing the plastic parts), and then replace the damaged screw. When replacing, check if the screw hole is intact: If the screw hole is enlarged, use self-tapping screws + metal sleeves for repair, or re-tap the hole to match a larger screw size (ensure that the chair back material can withstand the stress of the new size).

Repair precautions: Turn off the gas lift (if any) before operation to avoid accidental chair movement; record the positions of screws when disassembling for easy reassembly; if structural safety is involved (such as gas lift connection), it is recommended to contact professional repair personnel for handling.