Assemble your Vinsetto Linen Mid Back Office Chair with Tilt Function, and Padded Armrests (Light Grey) using this comprehensive step-by-step, verified components list, and care instructions.
The Vinsetto Linen Office Chair is designed for both comfort and productivity. Featuring a supportive mid-back profile, ergonomic tilt and height adjustment, and breathable linen upholstery, it delivers long-lasting comfort for work or study. The heavy-duty metal base and smooth-rolling casters ensure stability and easy mobility on any surface.
Parts and Hardware List
| Label | Part Name | Quantity | Description |
| A | Backrest | 1 | The main upright back support of the chair. |
| B | Seat Cushion | 1 | The padded seat section you sit on. |
| C (R/L) | Armrests (Right & Left) | 1 set | A pair of right and left armrests. |
| D | Mechanism Plate | 1 | The under-seat control unit for height and tilt adjustment. |
| E | Gas Lift Cylinder | 1 | The adjustable piston for raising or lowering the seat height. |
| F | Chair Base | 1 | The five-legged star base that holds the casters. |
| G | Casters (Wheels) | 5 | Wheels that attach to the chair base for mobility. |
| H | Gas Lift Cover | 1 | Plastic sleeve that covers the gas lift for a clean look. |
Hardware List
| Label | Hardware | Quantity | Description |
| I | M6×20 Screws (+1 spare) | 6 + 1 | Short screws used for fixing components such as armrests. |
| J | M6×30 Screws (+1 spare) | 2 + 1 | Medium screws used for connecting the seat or mechanism. |
| K | M6×40 Screws (+1 spare) | 6 + 1 | Longer screws for securing the backrest or key load points. |
| L | Allen Key | 1 | Hex key tool used to tighten all M6 screws. |
Before You Begin
- Read all instructions carefully before assembly.
- Recommended assembly time: Approximately 30 minutes.
- Recommended personnel: One person.
- Assemble on a flat, soft surface to prevent scratches.
- Verify that all components are included and undamaged.
- Keep all small parts away from children during assembly.
- Do not fully tighten screws until all parts are aligned.
- This product is intended for indoor office or home use only.
Assembly Instructions
When you are going to assemble your Vinsetto Linen Mid Back Office Chair with Tilt Function (SKU: 921-540LG) please follow these instructions carefully.
Step 1 – Assemble the Chair Base (F, G, E & H)
- Insert all five castors (G) into the holes located at the ends of the 5-star base (F).
- Push each castor firmly until it clicks securely into place.
- Turn the base upright and check that all castors roll smoothly and are evenly fitted.
- Insert the gas lift (E) vertically into the center opening of the base.
- Slide the gas lift cover (H) over the gas lift, ensuring the wider end rests on the base and the narrow end faces upward.
- Confirm the gas lift sits straight and stable before proceeding to the next step.
Step 2 – Attach the Backrest (A) to the Seat Cushion (B)
- Place the seat cushion (B) upside down on a flat, clean surface with the front edge facing forward.
- Position the backrest (A) upright behind the seat, ensuring the “FRONT” label on the backrest faces the correct direction.
- Align the mounting brackets on the lower part of the backrest with the pre-drilled holes on the seat cushion.
- Insert the long screws (K) through the bracket holes into the seat base.
- Tighten all screws evenly using the Allen key (L), but avoid over-tightening to prevent thread damage.
- Confirm that the backrest (A) is firmly attached and sits flush with the seat cushion (B).
Step 3 – Attach the Tilt Mechanism (D) to the Seat Cushion (B)
- Keep the seat cushion (B) upside down on a flat surface with the front edge facing forward.
- Position the tilt mechanism (D) beneath the seat, ensuring the “FRONT” marking on the mechanism faces the same direction as the seat front.
- Align the mounting holes on the tilt mechanism with the pre-drilled holes under the seat cushion.
- Insert the long screws (K) through the holes in the mechanism and into the threaded inserts in the seat base.
- Tighten each screw evenly using the Allen key (L), making sure the mechanism sits flat and secure.
Step 4 – Secure the Backrest (A) to the Tilt Mechanism (D)
- Keep the seat cushion (B) with the attached tilt mechanism (D) upside down on a stable surface.
- Position the backrest (A) upright and align its lower mounting holes with the upper slots of the tilt mechanism.
- Insert two medium screws (J) through the tilt mechanism into the backrest brackets.
- Tighten both screws evenly using the Allen key (L).
- Ensure the backrest (A) is firmly connected to the tilt mechanism (D) and stands straight when upright.
Step 5 – Connect the Seat Assembly to the Chair Base
- Carefully lift the fully assembled seat unit with attached armrests, backrest, and tilt mechanism.
- Align the central opening of the tilt mechanism with the top of the gas lift (E).
- Lower the seat assembly gently onto the gas lift, ensuring the cylinder fits securely into the mechanism socket.
- Press down slightly on the seat to lock the gas lift firmly in place.
- Check that the chair is balanced and stable before use.
- Sit on the chair carefully to confirm the height adjustment and tilt functions are working properly.
Adjustment and Usage
Seat Height Adjustment
- While seated, pull the lever under the seat upward to raise or lower the height.
- Release the lever once the desired height is reached.
Tilt Function
- Pull the lever outward to unlock the tilt function.
- Push it inward to lock the seat in the upright position.
- Adjust tilt tension using the round knob under the seat, turn clockwise to increase resistance, and counterclockwise to reduce it.
Swivel Function
- The chair rotates a full 360° for easy movement and multi-directional access.
Caster Mobility
- Smooth-rolling casters allow effortless movement on hard floors and low-pile carpets.
- Avoid using uneven surfaces to prevent wear on the wheels.
Safety Instructions
- Do not exceed the maximum load capacity of 120 kg (265 lbs).
- Use the chair only for its intended purpose, do not stand or kneel on it.
- Always sit with weight evenly distributed on the seat.
- Avoid tilting the chair excessively backward.
- Check that all screws are tightened before use.
- Keep hands and fingers away from moving parts during height or tilt adjustment.
Maintenance and Care
- Clean the linen upholstery with a soft, dry or slightly damp cloth.
- For stubborn dirt, use mild soapy water and dry immediately.
- Avoid using alcohol, bleach, or harsh chemicals.
- Inspect bolts and screws monthly; tighten if necessary.
- Do not expose yourself to direct sunlight or excessive humidity to prevent fabric fading or corrosion.
- Avoid dragging the chair when moving the lift slightly to protect flooring.
Troubleshooting
| Problem | Possible Cause | Solution |
| Chair height not adjusting | Gas lift not seated correctly | Remove seat and reinstall the gas lift properly |
| Chair tilts too easily | Tilt tension too loose | Turn adjustment knob clockwise to increase resistance |
| Creaking noise during use | Loose bolts | Check and tighten all screws and joints |
| Uneven movement | Damaged or improperly seated castors | Reinsert or replace castors securely |
Ready to Use!
Your Vinsetto Linen Mid Back Office Chair with Tilt Function is now fully assembled and ready to elevate your workspace comfort. You can also download the Vinsetto Office Chair Manual (SKU: 921-540LG) PDF for future reference.
Thank you for choosing Vinsetto, designed for ergonomic comfort, reliable performance, and modern sophistication.
For technical support, replacement parts, or product questions, contact Aosom LLC’s Customer Service and get friendly assistance.
FAQs
1. How do I ensure the gas lift is installed correctly?
Make sure the gas lift is inserted straight into the center of the chair base before attaching the seat assembly. After inserting, ensure the gas lift cover sits correctly and the gas lift is stable. This will ensure smooth height adjustments.
2. Why is my chair tilting too easily?
Check the tilt tension knob under the seat. If it’s too loose, tighten it by turning it clockwise. This will increase resistance and prevent the chair from tilting too easily during use.
3. What should I do if my chair height is not adjusting?
The most common cause is the gas lift not being seated properly. Remove the seat and reinstall the gas lift into the base, ensuring it fits securely. This will restore height adjustment functionality.