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Casters test method

Casters test method
Before the casters enter the market, they will definitely need to test accordingly in order to meet the standards of use. So what are the common casters test methods, and what are the requirements in the test?
1. Impact test Any item may cause collision vibration due to transportation, use, storage, etc., but the product may be bad or even unusable for a certain period of time. Furniture is often vulnerable to impact due to its large size and weight. Casters that determine whether the furniture is placed smoothly should have good impact resistance. The impact test method in the European casters test standard is: the casters are vertically mounted on the ground test platform, so that the weight of the mass is 5KG (±2%) from the height of 200mm, the allowable deviation is ±3mm, and the position is free to fall. If the wheel is on the side of the casters, if it is two rounds, the two wheels should be impacted at the same time. No part of the caster is allowed to separate throughout the experiment. After the experiment is completed, the rolling of the casters, the pivoting or braking function should not be damaged.
2. Static load test The caster should always run stably on the ground, however it is almost a purely theoretical state. On a jagged surface, or when crossing a threshold, a track or a pit, the casters will briefly leave the ground. So when they suddenly overload, or when 3 of the 4 casters touch the ground, they must carry the load of the entire furniture. The test procedure for casters static load in the European standard is that the casters are screwed on a horizontally smooth steel test platform, applying a force of 800 N along the center of gravity of the caster to maintain 24H, and checking the condition of the casters after 24 hours of removal of the force. The deformation of the casters does not exceed 3% of the diameter of the wheel, and the rolling of the casters after the completion of the experiment, the rotation of the shaft or the braking function is not damaged.
3. Resistance performance test When testing this performance, the casters should be kept dry and clean. Place the casters on a metal plate insulated from the ground, keep the wheel edge in contact with the metal plate, and load the casters on the nominal load by 5% to 10%. The resistance between the casters and the metal plate was measured using an insulation resistance tester (nominal open circuit voltage of 500 V, measured resistance fluctuations within 10% and no loss on the product of 3 W). For conductivity type casters, the resistance value is not greater than 104 ohms, while the resistance of antistatic casters should be between 105 ohms and 107 ohms.