What are the industry standards for furniture casters?

The main industry standard for furniture casters is QB/T 4765-2014, "Casters for Furniture." The specifics are as follows:

Scope of application: Applicable to non-powered mobile casters for furniture, not applicable to casters for office chairs (swivel chairs).

Appearance requirements: The caster surface should be smooth and free of defects such as cracks, scratches, or burrs. The surface of metal parts should be smooth and flat, free of defects such as rust, burrs, or exposed bottoms.

Assembly requirements: Rotating parts should rotate freely and without binding or loosening. Caster components should be securely assembled, and the axle should not rotate with the wheel.

Impact resistance: The caster should be securely mounted vertically with the upper end facing downward on the test equipment. Use a free-fall device at the specified impact height and impact the caster surface 10 times within 10 minutes. For twin-wheel casters, both wheels should be impacted simultaneously. Caster components must not separate or loosen, and the rolling, swivel, and braking functions of the caster must not be impaired.

Conductivity: The caster must be clean and dry. Mount the caster on a metal plate and apply an additional rated load (5%-10%) vertically to the caster. Use a megohmmeter to measure the resistance between the mounting surface and the axle, as well as the metal plate. Conductive casters must have a resistance of R < 10⁵Ω; anti-static casters must have a resistance of 10⁵Ω ≤ R ≤ 10⁷Ω.

Manual Locking Device: Mount the caster on appropriate test equipment, activate the manual locking device, and observe whether the caster rotates about its axis. The requirement is that the caster should not rotate about its axis.

Dynamic Load: Mount the caster on specified test equipment as required and apply the specified dynamic load to the caster, simulating the dynamic forces experienced in actual use. Caster components must not separate or loosen, and the caster's rolling, swivel, and braking functions must not be impaired. Rolling Resistance: Mount the caster on a specific test device, set the test conditions, apply a specified load, and allow the caster to roll on the device. Measure the horizontal traction force F5 generated during rolling. This force should not exceed 15% of F6 (F6 is the specified load).

Rotational Resistance: Mount the caster on a test device that meets the standard requirements, set the test conditions according to the standard, apply a force that causes the caster to rotate about its vertical axis, and measure the horizontal traction force F7 generated during this process. This force should not exceed 20% of F6.

Static Load: Mount the caster on the test device and apply a vertical load of 2Fmax to a smooth, clean, horizontal steel surface for 24 hours. After unloading, measure the wheel diameter deformation 24 hours later. Wheel diameter deformation should not exceed 3%. Caster components should not separate or become loose, and the caster's rolling, rotating, and braking functions should not be impaired.