Casters are a collective term that includes activities and fixed casters. The movable caster is also called the universal wheel. Its structure allows 360 degree rotation; the fixed caster has no rotating structure and cannot rotate. Usually, the two casters are generally used together. For example, the structure of the trolley is the front two fixed wheels, and the rear side is close to the push armrests, which are two movable universal wheels.
Caster history
It is also very difficult to trace the history of the casters, but after people invented the wheels, it is much easier to carry and move the objects, but the wheels can only run in a straight line, and the change in direction when carrying a large object is still Very difficult, and later people invented the wheel with the steering structure, which we now call the caster or universal wheel. The caster has revolutionized the era of people carrying, especially moving objects, not only easy to carry, but also can move in any direction, greatly improving efficiency.
In the modern era, with the rise of the industrial revolution, more and more equipment needs to be moved, casters are becoming more and more widely used all over the world, and all walks of life are almost inseparable from casters. In modern times, with the continuous development of technology, equipment is becoming more and more versatile and highly utilized, and casters become indispensable parts. The development of casters has become more specialized and has become a special industry.
Caster application
Castors are used in a wide range of applications and involve almost any industry. According to the needs of different industries, people constantly invent all kinds of casters. There are about 150,000 different casters in various industries in the world.
The caster is constructed by a single wheel mounted on a bracket for mounting underneath the device to move freely. Casters are mainly divided into two categories:
A fixed caster mounting bracket with a single wheel can only move in a straight line.
The bracket for the 360-degree steering of the B-active caster is equipped with a single wheel and can be driven in any direction at will.
Industrial casters have a wide variety of wheels, varying in size, model, and tire surface. Choosing the right wheel is based on the following conditions:
A carrying capacity.
B use of the venue environment
C various special climates, such as humidity, high temperature or severe cold.
D working environment contains chemicals, blood, oil, oil, salt and other substances.
E requirements for impact, collision and quiet driving.
How to choose the caster that suits you
First, how to choose the right wheel
1. Select the wheel material: first consider the size of the road surface, the obstacles, the residual materials on the site (such as iron filings, grease), the environmental conditions (such as high temperature, normal temperature or low temperature) and the weight that the wheels can carry. The conditions determine the choice of the appropriate 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 resistant wheels can be used in different special environments.
2. Calculate the weight of the load: In order to be able to calculate the required load capacity of the 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 load capacity required for a single wheel or caster is calculated as follows:
T=(E+Z)/M×N:
---T=bearing weight required for single wheel or caster;
---E=The weight of the transport equipment;
---Z=maximum load;
---M=Number of single wheels and casters used;
---N = safety factor (about 1.3-1.5).
3. Determine the size of the wheel diameter: Generally, the larger the diameter of the wheel, the easier it is to push. The greater the load capacity, the better the ground can be protected from damage. The choice of the size of the wheel diameter should first consider the weight of the load and the starting thrust of the truck under the load. To decide.
4, the choice of soft and hard wheel material: usually the wheel has nylon wheel, super polyurethane wheel, high-strength polyurethane wheel, high-strength artificial rubber wheel, iron wheel, air pump. Super polyurethane wheel and high-strength polyurethane wheel can meet your handling requirements whether you are driving indoors or outdoors. High-strength artificial rubber wheels can be applied to hotels, medical equipment, floors, wooden floors, tile floors, etc. It is required to travel on the ground with low noise and quiet when walking; nylon wheels and iron wheels are suitable for places with uneven ground or iron scrap on the ground; and air wheels are suitable for light load and soft uneven road.
5, the flexibility of rotation: the larger the wheel, the more labor-saving, the roller bearing can carry heavier load, the resistance is greater when rotating: high-quality (bearing steel) ball bearing on single wheel installation, can carry heavier load The rotation is lighter, more flexible and quiet.
6. Temperature condition: The impact of the cold and high temperature on the casters is very great. The polyurethane wheel is at a low temperature of minus 45 °C, and the rotation is flexible. The high temperature resistant wheel rotates lightly at a high temperature of 275 °C.
Second, how to choose the appropriate wheel carrier
1. Usually choose the suitable wheel carrier. 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 goods are light, (each caster is carried at 10-140kg) It is suitable for electroplating wheel frame which is formed by stamping of thin steel plate (2-4mm). Its wheel frame is light, flexible in operation, quiet and beautiful. This plated wheel frame is divided into double row beads and single row beads according to the ball arrangement. Apply double rows of beads if moving or handling.
2. In the factories and warehouses, where the goods are transported frequently and the load is heavy (each caster is carried at 280-420kg), it is suitable to use double-row ball wheels that are hot forged and welded with thick steel plates (5-6 mm). frame.
3. If it is used to carry heavy objects such as textile factories, automobile factories, machinery factories, etc., due to the heavy load and long walking distance in the factory (each caster is carried at 350-1200kg), it should be selected with thick steel plate (8-12mm). The wheel frame welded after cutting, the movable wheel frame uses the flat ball bearing and the ball bearing on the bottom plate, so that the caster can bear heavy load, flexible rotation and anti-impact function.
Third, choose the right bearing
1. Teling Bearing: Teling is a special engineering plastic, suitable for wet and corrosive places. The flexibility of rotation is general and the resistance is large.
2. Roller bearings: Heat-treated roller bearings can carry heavier loads, and the rotation flexibility is general.
3, ball bearing: ball bearing made of high-quality bearing steel, can carry heavier load, suitable for occasions requiring flexible rotation and quiet.
4, plane bearing: suitable for high and extra high load and high speed.
The material of the casters:
Nitrile rubber rubber wheel (NBR), nitrile rubber, natural rubber rubber wheel, silicone rubber rubber wheel, neoprene rubber wheel, butyl rubber rubber wheel, silicone rubber (SILICOME), EPDM rubber wheel ( EPDM), fluoro rubber rubber wheel (VITON), hydrogenated nitrile (HNBR), polyurethane rubber wheel, rubber plastic, PU rubber wheel, PTFE rubber wheel (PTFE processing parts), nylon gear, polyoxymethylene rubber Wheel, PEEK rubber wheel, PA66 gear, POM rubber wheel, engineering plastic parts (such as high-strength performance PPS pipe, PEEK pipe, etc.).
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Label: Casting, application
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