Choose the wheel material: first consider the size of the road surface, obstacles, residues on the site (such as iron filings, and grease), environmental conditions (such as high temperature, average temperature, or low temperature), and the weight that the wheel can bear. States 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 suitable for different particular environments.
Calculate the load-bearing weight: To be able to calculate the required load-bearing capacity of various casters, it is necessary to know the weight of the transport equipment, the maximum load, and the number of single wheels and casters used. The required load capacity of a single wheel or caster is calculated as follows:
—T=The required weight of a single wheel or caster;
—E=The weight of the transportation equipment;
—M=The number of single wheels and casters used;
—N=Safety factor (about 1.3-1.5).
Determine the wheel diameter: Generally, the larger the wheel diameter, the easier it is to push, and the larger the load capacity is. At the same time, it can protect the ground from damage. The choice of wheel diameter should first consider the load-carrying weight and the starting thrust of the truck under the load. To decide.
The choice of wheel material: soft and hard wheels: 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 regardless of whether they are driving on the ground 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 the quiet ground when walking; nylon wheels and iron wheels are suitable for places with uneven ground or iron filings on the earth, and air pumps are ideal for light loads and soft and rough roads.
Rotation flexibility: the larger the single wheel, the more labor-saving the rotation, the roller bearing can carry heavier loads, and the resistance during rotation is greater: the single wheel is installed with high-quality (bearing steel) ball bearings, which can carry heavier loads, Rotation is lighter, flexible and quiet.
Temperature conditions: Severe cold and high-temperature occasions significantly impact casters. Polyurethane wheels can rotate flexibly at a low temperature of minus 45°C, and high-temperature resistant wheels can spin lightly at a high temperature of 275°C.
how to choose the appropriate wheel frame
Generally, when choosing a suitable wheel frame, first consider the weight carried by the casters, such as supermarkets, schools, hospitals, office buildings, hotels, etc., because the floor is good, smooth and the cargo carried is lighter, (each caster carries 10-140kg) , It is suitable to choose the electroplated wheel frame stamped and formed of thin steel plate (2-4mm). Its wheel frame is light, flexible in operation, quiet, and beautiful. The electroplated wheel frame is divided into double-row balls and single-row balls according to the arrangement of the balls. If it is often moved or transported, double-row beads should be used.
In factories and warehouses and other places, where the cargo is moved frequently and the load is heavy (each caster carries a load of 280-420kg), it is suitable to use thick steel plate (5-6 mm) stamping, hot forging, and welding double-row ball wheels shelf.
If it is used to carry heavy objects such as textile factories, automobile factories, machinery factories, etc., due to the heavy load and the long walking distance in the factory (each caster carries 350-1200kg), thick steel plates (8-12mm ) After cutting the welded wheel frame, the movable wheel frame uses flat ball bearings and ball bearings on the bottom plate, so that the casters can withstand heavy loads, rotate flexibly, and resist impact.
choose the right bearing
Telling bearing: Telling is a special engineering plastic, which is suitable for wet and corrosive places. The flexibility of rotation is general and the resistance is relatively large.
Roller bearings: The heat-treated roller bearings can carry heavier loads and have average rotational flexibility.
Ball bearings: Ball bearings made of high-quality bearing steel can carry heavier loads and are suitable for occasions that require flexible rotation and quietness.
Planar bearings: suitable for occasions with high and extremely high loads and high speeds.