There are many casters in the daily life, do you know how to select these?
1. Select the size:
For general casters, the larger diameter is, the more effort of promote and the better of obstacle. Owing to the first casters in the West in the 19th century, the casters are indicated in inches. Even in China. There are mostly 5-inch , 4-inch casters in China's supermarket trolleys. The current market size of the popular casters from 1 inch to 10 inches have, which is commonly used in the size of 2 inch, 2.5 inch, 3 inch, 3.5 inch, 4 inch, 5 inch, 6 inch, 8 inch, 10 inch, etc. If the equipment need to promote, such as the supermarket shopping cart, logistics trolleys, tool vehicles, such as the use of 4 to 6 inch casters better. However, the diameter of the casters is too large will increase the center of gravity equipment, the cost increase, so you need consider all aspects. If the equipment does not require frequent promotion, such as furniture, refrigerators, etc., only when engaged in hygiene need to move about, use the following 3-inch casters can be.
2. Look at the load:
For the same diameter casters, the general manufacturers will produce several series for different load-bearing, such as light, medium, heavy, etc. which is to allow the casters and wheels have different thickness or material. Calculate the load of a single casters to give a certain insurance factor, the ground is relatively flat, a single casters load = (total equipment weight ÷ installed casters) × 1.2 (insurance factor); if the ground is not smooth, the algorithm is, Caster load = gross weight of the equipment ÷ 3, since there are always at least three wheels at the same time supporting the equipment, regardless of the non-flat ground. This algorithm is equivalent to an increase of the insurance factor, more reliable, to prevent load-bearing, resulting in significantly reduced or lead to life ACCIDENT. In foreign companies, bearing the general said in pounds, and most of the domestic use of kilograms, their conversion relationship is: 2.2 pounds = 1 kg.