1. Introduction
Thank you for choosing the HYLONE Armless Drafting Chair. This manual provides essential information for the safe assembly, proper operation, and effective maintenance of your new chair. Please read all instructions carefully before use to ensure optimal performance and longevity of the product.

Figure 1: HYLONE Armless Drafting Chair (Black)
2. Safety Information
- Ensure the chair is used on a stable, level surface to prevent tipping.
- Verify the maximum weight recommendation of 280 pounds is not exceeded.
- Follow all instructions for adjusting chair height and other mechanisms carefully.
- Keep hands and fingers clear of moving parts during adjustment.
- Do not stand on the chair.
- Regularly inspect all bolts and connections to ensure they are tight.
3. Package Contents
Before beginning assembly, please ensure all parts listed below are present and undamaged. If any parts are missing or damaged, please contact customer support.

Figure 2: All components included in the package.
- Back Cushion (1)
- Seat Cushion (1)
- Gas Lift (1)
- Foot Ring (1)
- Seat Plate (1)
- Star Base (1)
- Casters (5)
- Bolts & Washers (various sizes)
- Wrench (1)
4. Setup and Assembly
Assembly is straightforward and typically takes 10-15 minutes. It is recommended to assemble the chair on a carpet or soft surface to prevent scratching.
- Attach the Seat Plate: Secure the seat plate to the underside of the seat cushion using the provided bolts (M6*20mm) and washers (M6*15mm). Ensure all bolts are tightened securely with the included wrench.
- Install the Back Cushion: Attach the back cushion to the seat plate using the longer bolts (M6*35mm and M6*40mm) and washers (M6*18mm). Tighten firmly.
- Insert the Gas Lift: Place the gas lift into the center hole of the star base.
- Attach the Foot Ring: Slide the foot ring over the gas lift and secure it at your desired height using the adjustment knob.
- Install Casters: Insert the five casters into the holes at the end of each leg of the star base until they click into place.
- Connect Seat to Base: Carefully place the assembled seat onto the gas lift, ensuring it is properly seated.
Assembly and Function Video Guide
Video 1: Detailed assembly instructions and demonstration of chair functions.
5. Operating Instructions
5.1. Seat Height Adjustment
To adjust the seat height, pull the lever located under the right side of the seat upwards. While standing, the seat will rise. To lower the seat, pull the lever upwards while seated. Release the lever at your desired height.

Figure 3: Chair height adjustment for various desk types.
5.2. Tilt Function and Tension Adjustment
The chair features a tilt mechanism allowing the backrest to recline. To activate the tilt, pull the same lever used for height adjustment outwards. To lock the chair in an upright position, push the lever inwards. The tilt tension can be adjusted by rotating the round knob located under the seat, allowing you to control the resistance when reclining.
5.3. Foot Ring Adjustment
The foot ring provides support for your feet, especially at higher seat settings. To adjust its height, loosen the knob on the foot ring, slide it to your preferred position, and then tighten the knob securely to fix it in place.

Figure 4: Detail of the adjustable foot ring.
6. Maintenance
- Cleaning: Wipe clean with a damp cloth. Avoid harsh chemicals that may damage the mesh or fabric.
- Inspection: Periodically check all screws and bolts to ensure they are tight. Re-tighten if necessary.
- Casters: Keep casters free of debris to ensure smooth rolling.
7. Troubleshooting
- Chair not adjusting height: Ensure the gas lift lever is fully engaged and that there is no obstruction. If the gas lift is faulty, it may need replacement.
- Chair wobbles: Check all assembly bolts and ensure they are securely tightened. Verify the chair is on a flat, even surface.
- Casters not rolling smoothly: Inspect casters for trapped hair or debris and clean as needed.
- Backrest does not tilt: Ensure the tilt lock lever is disengaged. Adjust the tilt tension knob to your preference.
8. Specifications
| Feature | Detail |
|---|---|
| Brand | HYLONE |
| Model Name | HL-0011C-GM |
| Color | Black |
| Product Dimensions | 17.91"D x 18.7"W x 46.46"H |
| Seat Height | Adjustable (22 Inches minimum) |
| Maximum Weight Recommendation | 280 Pounds |
| Special Features | Adjustable Height, 360-degree Swivel, Seat Tension Adjustment, Foot Ring, Premium Breathable Mesh |
| Material | Mesh, Foam, FSC-Certified Wood (seat board) |
| Included Components | Caster, Cushion |
9. Warranty and Support
Each HYLONE drafting chair comes with a 12-month guaranteed warranty. If you require any assistance, have questions, or encounter issues with your product, please do not hesitate to contact us via buyer message. Our customer support team is dedicated to helping you.