In ancient times, logs were placed under heavy objects to carry heavy loads. So you have the prototype of the roller wheel.
Later people invented the wheel, which made it much easier to carry and move objects. Up to now, all kinds of wheels are various, making people’s life more convenient.
In the big family of the wheel, the casters are indispensable. Its appearance has brought about an epoch-making revolution for people to carry — especially for moving objects. It can not only be carried easily but also move in any direction, significantly improving efficiency.
In modern times, with the rise of the industrial revolution, more and more equipment needs to be moved, and casters are widely used all over the world. All walks of life can hardly do without casters.
In modern times, with the continuous development of science and technology, the equipment also has more and more functions and high utilisation rate, the caster has become an indispensable part.
The development of casters is also more professional and finally becomes a unique industry.
Today, we will understand the caster and how to buy caster.
When it comes to casters, perhaps the most common casters we encounter are universal wheels, which are designed to allow 360-degree rotation but are only a classification of casters. Its counterpart is the fixed wheel, which can only roll in one direction. The combination of universal wheel and the fixed wheel is more common.
Castors are divided into civil castors and industrial castors according to their USES. Generally, the bearing capacity of civil castors is lighter than that of industrial castors, but civil castors sometimes have special requirements on materials and other aspects.
According to the load is divided into the light caster, medium caster, heavy caster, extra heavy caster and special caster.
Generally speaking, the upper limit of the industrial caster is 300-350kg, which is the medium caster mentioned in the above classification.
Industrial casters have heavy casters with a load of 500-2000kg, And the upper limit of super-heavy casters can reach 3,000-10,000kg.
According to the function, it is divided into screw caster, brake caster (double brake caster, hawk rack caster), shock absorbing caster, etc.
It can be divided into iron core caster, plastic caster, stainless steel caster, polyurethane caster, nylon caster, rubber caster, all iron caster, etc. Different materials have different characteristics, applied to different occasions; the same price is different
Casters of various kinds, but they have their own characteristics, in the purchase must choose according to their needs to the appropriate casters.
Under normal circumstances, we choose and buy casters from the load, application type, use frequency, use environment four points to start, mainly see the wheel, wheel frame, bearing.
First, the carrying weight of the wheel determines the upper limit of the casters.The load capacity required for a single wheel or caster is calculated as follows:
(frame weight + maximum load) ÷ the number of casters used x safe use coefficient (generally 1.3 to 1.5 times) = the required casters load
Here to give you a general, because when the number of casters used is 4, there will be a casters suspended, so the load should be calculated by 3.
In this way, the caster we choose will bear more weight than our actual load, so as to avoid the damage of the caster.At the same time, in the choice of load bearing should be calculated according to the maximum support point caster weight.
Secondly, when selecting casters, we should consider the type of application, that is, where we use them — storage, mobile handling, mobile platform, scaffolding, forklift, trolley, flatbed trolley, steel pipe deruster, large circular pipe welding frame, mobile pipe welding frame, tooling shelves, mobile logistics shelves and so on.
The casters used in different places can choose different bearing capacity, wheel diameter, rotation flexibility, bearing, etc.
Generally, the larger the wheel diameter, the easier it is to push, the greater the load capacity, and the better it can protect the ground from damage.Therefore, the selection of wheel diameter should first consider the bearing weight and the starting thrust of the porter under load.The bigger the single wheel rotates, the less effort is needed. The single wheel is equipped with high quality (bearing steel) ball bearing, which can bear heavier load, and the rotation is lighter, flexible and quiet.
Thirdly, different materials are selected for different use frequency.For example, in factories, warehouses and other places, where goods are carried frequently and the load is heavy (each casters carries 280-420kg), it is suitable to choose the double row ball rack with thick steel plate (5-6 mm) stamping, hot forging and welding;If used for carrying 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), the thick steel plate (8-12mm) should be selected for the wheel rack that is welded after cutting. The movable wheel rack USES plane ball bearing and ball bearing on the bottom plate, so that the caster can bear heavy load, rotate flexibly and resist impact.
And the full iron wheel and iron-core nylon wheel are not easy to deformation, load bearing capacity, so the use of these materials in the casters in the long-term full load does not move will not cause deformation;Polyurethane caster is relatively quiet and wear resistant, widely used in home, hospital, office and other places.
Finally, the environment is also very important.When considering the use environment, we should consider the size of the road, obstacles, residual substances on the site (such as iron filings, grease), the environmental conditions (such as high temperature, normal temperature or low temperature) and other different conditions to decide the appropriate wheel material.
For example: rubber wheel can not withstand acid, grease and chemicals, so in the acid, oil and other chemicals dripping sites do not choose rubber wheels.At the same time, the choice of soft and hard wheel material is also related to the use environment.Super polyurethane wheel and high strength iron-core polyurethane wheel can meet your requirements of handling no matter they are driven on indoor or outdoor ground.High strength synthetic rubber wheel can be applied to hotel, medical equipment, floor, wood floor, ceramic tile floor and other requirements when walking on the ground with small noise and quiet driving;Nylon wheel, iron wheel is suitable for uneven ground or on the ground with iron scrap and other materials;
Shock – absorbing casters are generally used on uneven road surface, but the goods can not be jolted, which requires a buffer effect on the vehicle.Therefore the automobile parts factory and the automobile assembly factory accessories transportation and the vehicle frame transportation, as well as the glass factory, the assembly workshop often chooses the damping caster.
Selecting suitable casters can reduce the loss of goods and avoid the damage of personnel.But the maintenance of casters is also very important.Therefore, check the supports and fasteners regularly. At the same time, overload or impact will cause the supports to twist, and the twisted supports will cause the heavy load to lean on the individual wheels, resulting in premature damage to the wheels. Lubricate regularly and lubricate every 6 months normally.
Above is about casters some introduction, hope to let us have a simple understanding of casters, and in the purchase and use of some help.
