Office Chair Mechanism Model: S4386 — Swivel Tilt with Locking Levers

The S4386 swivel mechanism is a replacement part designed for DIY chair builds and chair-repair projects, delivering reliable seat and back tilt control in a compact black package. Note: this item is currently not available.

Features

• Swivel mechanism with integrated seat and back tilt
• Single lever controls gas cylinder activation
• Single lever controls back and seat tilt adjustment
• Locking levers for seat and back tilt allow positioning in any angle
• Designed to accept straight 2.25" wide back uprights
• Works with standard tapered gas lift cylinders
• Finish: Black
• Engineering notes: product drawing measurements are in millimeters (mm); conversion reference is 1 inch = 25.4 mm

Benefits

With the S4386, you gain precise, independent control over how your chair tilts, helping you tailor comfort for long workdays or intensive drafting sessions. The dual-lever system simplifies adjustments—one lever handles gas lift activation while the other governs tilt for the seat and back—so you can fine-tune your posture without interrupting your workflow.

This mechanism is ideal for:

• Replacing a worn or broken tilt assembly in existing office chairs
• DIY chair projects where a reliable tilt and lock function is needed
• Custom ergonomic setups that require locking the seat or back tilt at in-between angles

Key practical considerations: ensure your chair frame accommodates a straight 2.25" back upright and that the installation plan uses a standard tapered gas lift. The black finish blends with most chair designs, making it a versatile addition to refurbishing projects or new builds alike.