Application and selection of the hottest caster

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Application and selection of castors it is also difficult to trace the history of castors. However, after people invented the wheel, it became much easier to carry and move objects, but the wheel can only run on a straight line, and it is still very difficult to change the direction when carrying major objects. Later, people invented the wheel with steering structure, which is now called castor or universal wheel. The emergence of casters has brought a revolution of the times to people's handling, especially moving objects. They can not only be easily handled, but also move in any direction, greatly improving the efficiency

in modern times, with the rise of the industrial revolution, more and more equipment needed to be moved, and casters were more and more widely used all over the world. All walks of life were almost inseparable from casters. In modern times, with the continuous development of science and technology, the equipment has more and more functions and high utilization rate, and the caster has become an indispensable component. The development of casters has become more specialized and has become a special industry

casters are a general term, including movable and fixed casters. The movable caster is also known as the universal wheel. Its structure allows 360 degree rotation; The fixed caster has no rotating structure and cannot rotate. Generally, the two casters are used together. For example, the structure of the trolley is two fixed wheels in the front, and two movable universal wheels close to the push handrail in the rear

a product, because casters are a general term, including movable and fixed casters. The movable caster is also known as the universal wheel. Its structure allows 360 degree rotation; The fixed caster has no rotating structure and cannot rotate. Generally, the two casters are used together. For example, the structure of the trolley is two fixed wheels in the front, and two movable universal wheels close to the push handrail in the rear

application of casters

casters are widely used in almost any design industry. According to the needs of different industries, people continue to invent a variety of casters. There are about 150000 different casters used in various industries all over the world

casters are constructed by installing a single wheel on a bracket, which is installed under the equipment to make it move freely. Casters are mainly divided into two categories:

a fixed caster fixed bracket is equipped with a single wheel, which can only move along a straight line

b the support with 360 degree steering of movable casters is equipped with a single wheel, which can drive in any direction at will

there are many kinds of single wheels of industrial casters, which vary in size, model, tire tread, etc. The selection of appropriate wheels is based on the following conditions:

a bearing capacity

b site environment

c various special climates, such as humidity, high temperature or severe cold

d the working environment contains chemicals, blood, grease, oil, salt and other substances

e requirements for impact resistance, collision resistance and quiet driving

how to choose the casters suitable for your use

1. How to choose the appropriate wheel

1. Select the wheel material: first, consider the size of the road, obstacles, residual substances on the site (such as iron filings and grease), the environmental conditions (such as high temperature, normal temperature or low temperature) and the weight that the wheel can carry. For example, rubber wheels are not resistant to acid, grease and chemicals, while super polyurethane wheels, high-strength polyurethane wheels, nylon wheels, steel wheels and high-temperature wheels can be applied to different special environments

2. Calculation of bearing weight: in order to calculate the load capacity required by various castors, it is necessary to know the self weight of the transportation equipment, the maximum load and the number of single wheels and castors used. The required load capacity of a single wheel or caster is calculated as follows:

t= (e+z)/m × N:

--- t = required bearing weight of single wheel or caster

--- e = self weight of transportation equipment

---z= maximum load

---m= number of single wheels and casters used

--- n= safety factor (about 1.3-1.5)

3. Determine the wheel diameter: generally, the larger the wheel diameter is, the easier it is to push, the greater the load capacity is, and the better it can protect the ground from damage. The selection of wheel diameter should first consider the weight and the starting thrust of the carrier under load

4. Selection of soft and hard wheel materials: generally, the wheels include nylon wheel, super polyurethane wheel, high-strength polyurethane wheel, high-strength artificial rubber wheel, iron wheel and air pump wheel. Super polyurethane wheels and high-strength polyurethane wheels can meet your handling requirements no matter they are running on the ground indoors or outdoors; The high-strength man-made rubber wheel can be used in hotels, medical devices, floors, wood floors, ceramic tile floors, etc. it is required to drive on the quiet ground with the rapid development of wooden boxes, food and agriculture in China; Nylon wheels and iron wheels are suitable for places with uneven ground or iron filings on the ground; The air wheel is suitable for light load and soft and uneven road

5. Rotation flexibility: the larger the single wheel is, the more labor-saving it will be. The roller bearing can carry heavy loads, and the greater the resistance during rotation: the single wheel is installed with high-quality (bearing steel) ball bearings, which can carry heavy loads, and the rotation is more portable, flexible and quiet

6. Temperature condition: severe cold and high temperature have a great impact on casters. Under general conditions, the polyurethane wheel can rotate flexibly at a low temperature of minus 45 ℃, and the high temperature resistant wheel can rotate easily at a high temperature of 275 ℃

II. How to select an appropriate wheel frame

1. Generally, the weight of casters should be considered first, such as supermarkets, schools, hospitals, office buildings, hotels and other places. Because the floor is good, smooth, and the photoelectric induction of goods handled is relatively advanced and light (each caster carries kg), it is suitable to select electroplated wheel frames formed by stamping thin steel plates (but the workbench is relatively large mm). The wheel frames are light and the operation is flexible, Quiet and beautiful, this electroplating wheel rack is divided into double row beads and single row beads according to the ball arrangement. If it is often moved or handled, double row beads shall be applied

2. In factories, warehouses and other places, if the goods are frequently transported and the load is heavy (each caster is loaded in kg), the wheel frame with double row balls stamped, hot forged and welded with thick steel plate (mm) is suitable

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 carries kg), the wheel frame welded after cutting with thick steel plate (mm) should be selected. The movable wheel frame uses flat ball bearings and ball bearings on the base plate, so that the casters can bear heavy loads, rotate flexibly, and resist impact

III. select suitable bearings

1. Terling bearing: terling is a special engineering plastic, suitable for wet and corrosive places, with general rotation flexibility and large resistance

2. Roller bearing: the roller bearing after heat treatment can bear heavy load and has general rotation flexibility

3. Ball bearing: the ball bearing made of high-quality bearing steel can bear heavy load and is suitable for occasions requiring flexible and quiet rotation

4. Plain bearing: suitable for high and extra high load and high speed occasions

castor material:

nitrile rubber wheel (NBR), nitrile rubber, natural rubber wheel, silicone fluororubber wheel, neoprene rubber wheel, butyl rubber wheel, silicone rubber (silicome), ethylene propylene diene rubber wheel (EPDM), Viton rubber wheel, hydrogenated nitrile (HNBR), polyurethane rubber wheel, rubber plastic, PU rubber wheel, polytetrafluoroethylene rubber wheel (PTFE machined part), nylon gear, polyformaldehyde rubber wheel, peek rubber wheel, PA66 gear, POM rubber wheel, engineering plastic parts (such as high-strength PPS pipe, peek pipe, etc.). And graphite, ceramics and so on

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