BIFMA X5.1 Chair Armrest Fatigue Testing Machine Heavy Duty 200kg Load 1000000 Cycles

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 in the armrest bracket, fixing screws and seat frame connection.

Every load-bearing component is designed with a high-strength margin. The main frame is fabricated from 80 × 80 × 4 mm welded square steel tube and stress-relieved before machining, keeping the test platform rigid at the 200 kg rated load and preventing fixture deflection from contaminating the armrest deformation data.

The test chair is clamped on the platform with the armrest positioned beneath the loading head. Two independent pneumatic cylinders drive the loading pads downward and sideways in a programmed sequence that reproduces how a seated user pushes, leans and rises from the armrest. Each cycle is counted by the PLC, and the machine stops automatically when the counter reaches the preset value, when a force limit is exceeded, or when the sample collapses.

The PLC records force, displacement and cycle number in real time, so the operator can export a complete fatigue curve for the test report without any additional data logger.

• 80 × 80 × 4 mm welded steel frame with stress-relief treatment for long-term dimensional stability
• 200 kg rated load capacity — twice the working load required by ANSI/BIFMA X5.1 armrest cyclic tests
• Hardened 45 steel loading pads with replaceable polyurethane contact faces to protect upholstery
• 5 kN pneumatic cylinders with guided rods to eliminate side loading on the seals
• Self-locking clamp fixtures that hold the chair securely without marking the finish at 200 kg load
• Linear guide rails in a dust-protected housing for a service life above ten million cycles
• Emergency stop, overload protection and safety guard interlock as standard

• ANSI/BIFMA X5.1-2011 clause 11.4 — armrest vertical and horizontal cyclic load
• EN 1728:2012 clause 6.4 — armrest static and fatigue load
• EN 1335-3 — office work chair armrest durability
• GB/T 10357.3 — chair armrest strength and durability
• ISO 7173 — seating armrest fatigue reference procedure

• SL-T11 test frame with motorized armrest height adjustment
• Two pneumatic loading units with 5 kN cylinders and pressure regulators
• PLC control cabinet with 7-inch color touch screen
• Set of clamping fixtures for chairs with and without castors
• Air preparation unit, connecting hoses and cable set
• Calibration certificate, operation manual and tool kit

Each unit is assembled and run in for 20,000 cycles at rated load before shipment, and is supplied with a calibration certificate traceable to the national force standard. A 24-month warranty covers the frame, the cylinders and the control system.