BIFMA X5.1 Office Chair Seat Stability Tester to Evaluate the Front and Rear Stability of Chairs

BIFMA Furniture Testing Equipment Office Chair Seat Stability Tester

Application

This machine is suitable to test the seats (such as chairs, office chairs) forward stability. The purpose of these tests is to evaluate the front and rear stability of chairs.

Principle
Put the test-piece on the test table, blocked the front leg, apply specified force with forward 20N applied at seat loading point, check the article tends to oventurn forward or not to determine the test-piece forward stability performance.

Install the loading basket under the table which is lifting by Pneumatic actuator, max loading capacity up to 150kg, the lift of cylinder is controlled by pneumatic attenuation device, Load-bearing basket adopt rubber cushioning device to ensure that fall to final position will not produce damage, the operation unit of table can control loading basket to rise or go down, dynamical movement can position device adjustment, easy to operation.

Technical parameter

a.Support fixture

Material:polypropyene

Dimension:1.5±0.4m(T)×356mm(W)×711mm(L)

b.Rear stability disk

weight:10±0.05kg

Dimension:350mm(dia.)×48mm(T)

The surface friction of the disk (disk to disk):sliding force shall be 31±9N

C.Template for real stability

Material:Nylon/3(thickness)×3(width)

weight:1.07±0.41kg

d.Front:stability loading disc:

Stability tests(ANSI/BIFMA X5.1-2017, clause 11)

Stability test(ANSI/BIFMA X5.4-2012, clause 21)

Loading basket can load the weights as bellows( loading basket weight is 10kg)

4kg for each piece, 28pcs(100x100x50mm)

2kg for each piece, 10pcs(100x50x50mm)

1kg for each piece, 4pcs(100x50x25mm)

Weight: 600N increment

Specification

A 79 kg (173 lb.) weight shall be placed on the seat at the center of the unit or on the

seating position nearest to the center of the chair

A block, obstruction or other restraining device 13 mm (0.5 in.) in height shall be

affixed to the test platform. The device shall prevent sliding but not restrict the unit

from tipping. On chairs that rotate, the base and casters shall be positioned to offer

the least resistance to rearward tipping of the chair

Loader: diameter 200mm.

Seat height: 30 to 65cm, manual adjustment

Testing Standards

BIFMA Chair Stability Tester.pdf