1. Select the wheel material: first consider the size of the road surface, obstacles, residual substances on the site (such as iron filings, grease), the environmental conditions (such as high temperature, normal temperature or low temperature) and the weight the wheel can carry Conditions to determine the choice of suitable wheel material. For example: rubber wheels are not resistant to acids, greases and chemicals. Super polyurethane wheels, high-strength polyurethane wheels, nylon wheels, steel wheels and high-temperature wheels can be used in different special environments.
2. Calculate the bearing weight: In order to be able to calculate the required load capacity of various casters, you must know the weight of the transport equipment, the maximum load and the number of single wheels and casters used. The load capacity required for a single wheel or caster is calculated as follows:
T = (E + Z) / M × N:
--- T = single wheel or caster required load weight;
--- E = the weight of the transportation equipment;
--- Z = Maximum load;
--- M = the number of single wheels and casters used;
--- N = safety factor (about 1.3-1.5).
3. Decide the wheel diameter: Generally, the larger the wheel diameter, the easier it is to push, the greater the load capacity and the better the protection of the ground from damage. The choice of wheel diameter should first consider the weight of the load and the starting thrust of the truck under load To decide.
4. Selection of soft and hard wheel materials: usually wheels include nylon wheels, super polyurethane wheels, high-strength polyurethane wheels, high-strength synthetic rubber wheels, iron wheels, and air pump wheels. Super polyurethane wheels and high-strength polyurethane wheels can meet your handling requirements no matter when they are driven indoors or outdoors; high-strength synthetic rubber wheels can be applied to hotels, medical equipment, floors, wooden floors, tile floors, etc. It is required to drive on a quiet and quiet ground when walking; nylon wheels and iron wheels are suitable for places with uneven ground or iron filings on the ground; and air pumps are suitable for occasions with light loads and soft and uneven roads.
5. Rotational flexibility: the larger the single wheel, the less effort it has to rotate. The roller bearing can carry heavier loads, and the resistance during rotation is greater: the single wheel is equipped with high-quality (bearing steel) ball bearings, which can carry heavier loads , Rotation is more portable, flexible and quiet.
6. Temperature conditions: The severe cold and high temperature have a great influence on the casters. The polyurethane wheel has a low temperature of minus 45 degrees Celsius.
