SL-T11 Chair Armrest Fatigue Testing Machine — High-Strength Heavy-Duty Frame The SL-T11 chair armrest fatigue testing machine is engineered for laboratories running continuous, high-volume durability programmes on office chairs, conference seating, school furniture and public-area seats. It applies repeating vertical and horizontal loads to the armrest assembly until structural failure occurs or the preset cycle count is reached, allowing precise recording of failure modes