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Introduction and selection of casters

Author:   Time:2016/4/23 11:27:50

Castor is a collectively, including fixed and removable casters. Movable castor is what we call a universal wheel, it allows the structure to rotate 360 degrees; the caster wheels are fixed without rotating structure, can not rotate. Usually two kinds of casters are generally paired with use, such as trolley structure is the front two fixed wheel, near the drive behind the armrest is two activities of universal wheel.

A product, because the caster is a collectively, including fixed and removable casters. Movable castor is what we call a universal wheel, it allows the structure to rotate 360 degrees; the caster wheels are fixed without rotating structure, can not rotate. Usually two kinds of casters are generally paired with use, such as trolley structure is the front two fixed wheel, near the drive behind the armrest is two activities of universal wheel.

Casters history

To trace the history of casters is a very difficult thing, but in people invented the wheel, handling and moving object becomes easier, but the wheels only in a straight line running, for handling major object toward the direction of the change is still very difficult, but later on people invented with steering structure of the wheel, that is what we now call the caster or wheel. Casters for people to carry especially moving objects brought the era of revolution, not only can be carried easily, also can be in any direction, greatly improving the efficiency of.

In modern times with the industrial revolution, more and more equipments need to move, castor is in all the world is more and more widely used in all walks of life, almost inseparable from the caster. Now with the development of science and technology, equipment is also more and more functions and high utilization rate, become an indispensable component of castor. Casters development becomes more specialized and became a special industry.

The application of casters

Castor is widely used, almost any of the design industry. According to the needs of different industries, people constantly invention every kind of casters, all over the world there are about 150000 different casters used in various industries.

Castor structure consists of a single wheel is mounted on the support and for mounting on the equipment, following its move freely. Castor is mainly divided into two categories:

A fixed castors fixed bracket with a single wheel, can only be moved along a straight line.

B casters 360 degrees turn bracket with a single wheel, can be freely in any direction.

Industrial casters single round variety, in size, type, tire surface vary. Choosing the right wheel to the following conditions:

A capacity.

B uses the site environment

C special climate, such as humidity, heat or cold.

D working environments containing chemicals, grease, blood, oil, salt and other material.

E impact, collision and driving halcyon requirement.

How to choose a suitable for your use of casters

One, how to choose the appropriate wheels

1, select the wheel material: first consider the use of road surface size, obstacles, venues on residual material (such as iron, oil ), the environmental conditions ( such as high temperature, at room temperature or low temperature ) and the wheel can hold different conditions to determine the choice of suitable wheel material. For example: rubber wheel is not acid, oil and chemicals, super-polyurethane wheels, high strength polyurethane wheels, nylon wheel, steel wheel and a round of high temperature can be applied to different special environment.

2, calculate the weight capacity: in order to calculate various casters require loading capacity, must know the transport equipment weight, maximum load and the single wheel and the quantity of castor. A single wheel or caster required load capacity is calculated as follows:

= T ( E+Z ) / M x N:

- T = single wheel or caster required bearing weight;

- E = transport equipment weight;

- Z = maximum load;

- M = the single wheel and the quantity of castor;

- N = safety coefficient ( ca. 1.3 - 1.5 ).

In 3, decided to wheel size: usually the wheel diameter gets bigger and more easy to drive, load capacity are also more Datong are to protect the floor from being damaged, wheel diameter size selection should first consider the bearing weight and load handling vehicle starting thrust to decide.

4 wheel material, soft and hard choices: usually wheel nylon wheel, super-polyurethane wheels, polyurethane wheels, high strength high strength artificial rubber tire, iron wheel, pump wheel. Super high strength polyurethane wheels, polyurethane wheels in both indoor and outdoor ground, can meet your handling requirements; high strength artificial rubber tire can apply to hotels, medical equipment, floors, wood floors, ceramic tile ground requirements when walking noise quiet ground running; nylon wheel, iron wheel suitable for ground rough or ground on iron material site; while inflating wheel is suitable for light load and pavement soft bumpy occasions.

In 5, the rotating flexibility: single wheel is rotating more labor-saving, roller bearings can carry a heavier load, rotation resistance: single wheel mounted on the quality ( bearing steel ball bearings, ) can carry heavier loads, turning more lightweight, flexible peace.

6, the temperature status: cold and high temperature occasions on the caster 's influence, polyurethane wheels in the minus 45 DEG C temperature, rotation is flexible, resistant to high temperature at the temperature of 275 DEG C wheel rotates under the light.

Two, how to choose the appropriate wheel frame

1, usually choose suitable wheel frame first consider casters bearing weight such as supermarkets, schools, hospitals, office buildings, hotels and other places, because the floor is good, smooth and handling lighter goods, ( each caster bearing in 10-140kg ), suitable for selection by a thin steel plate ( 2-4mm ) stamping electroplating wheel frame, the wheel frame is light, flexible operation, quiet and beautiful, the plating wheel frame according to the ball are arranged into double ball and a single row of beads. If often move or handling application of double ball.

In 2, factories and warehouses, cargo handling very frequent and heavy load ( each caster bearing in 280-420kg ) is suitable for use with a thick steel plate ( 5-6 mm ) stamping hot forging and welding of the double row ball wheel frame.

3, if used for carrying heavy loads such as textile factory, automobile factory, machinery factories and other places, because of large load and the factory to walk within long distance ( each caster bearing in 350-1200kg ), so it should be selected to thick plate ( 8-12mm ) after cutting welding wheel frame, movable wheel carrier using a plane bearing and ball bearing on the base plate on the casters, can bear heavy load, flexible rotation, impact resistance and other functions.

Three, to select a suitable bearing

In 1, crystal spirit bearing: Crystal spirit is the special engineering plastics, suitable for use in wet and corrosive places, rotational flexibility, resistance.

2: after the heat treatment, roller bearings roller bearings can carry a heavier load, rotational flexibility in general.

In 3, ball bearing: selection of high-quality bearing steel made of ball bearing, can bear heavier loads, applied to the requirements of flexible rotation and quiet place.

In 4, a plane bearing: suitable for high and super high load and high speed.

Casters of the material:

Nitrile rubber tire ( NBR ), nitrile rubber, natural rubber, rubber fluoride silicon rubber tire, rubber, butyl rubber neoprene rubber, silicone rubber ( SILICOME ), three EPDM rubber ( EPDM ), fluorine rubber, hydrogenated nitrile-butadiene rubber ( VITON ) ( HNBR ), polyurethane rubber roller, rubber, PU rubber wheel, PTFE rubber wheel ( PTFE machining parts ), nylon gear, POM rubber wheel rubber wheel gear, PEEK, PA66, POM rubber wheel, engineering plastic parts ( such as high performance PPS pipe, PEEK pipe ). There are graphite, ceramics and so on.