The OS-300 Chair Swivel Mechanism is a 3-lock synchro tilt mechanism with adjustable tilt tension—engineered for ergonomic comfort and smooth motion in office and task chairs.

It allows the user to recline naturally with synchronized seat and back movement while maintaining optimal posture. The 3-position tilt lock provides flexibility between upright, mid, and reclined settings, and the manual tension knob lets each user fine-tune resistance for their body weight.

Constructed from high-strength steel with a durable black powder-coated finish, the OS-300 ensures long-lasting performance and stability. Compatible with standard gas lifts and 5-star chair bases, it supports 360° rotation for unrestricted movement.

With dimensions of 630 × 700 × (1000–1055) this mechanism delivers a solid balance of comfort, control, and durability—ideal for modern ergonomic seating applications.