Nikolaev bushings bronze, brass BrOTsS555, BrAZh9-4, BrOF, circle, molding under the order

Nikolaev bushings bronze, brass BrOTsS555, BrAZh9-4, BrOF, circle, molding under the order

Bronze bushings are consumables that become unusable during long-term operation and must be replaced during repairs. A solid or split part has a cylindrical or conical shape of various sizes. An asterisk for a chain, a drive pulley or a clutch is attached to the sleeve. The inner hole must match the diameter of the shaft. Depending on the purpose of the bushings, there are bearing, transitional, and fixing bushings. In addition to these parts, bronze inserts are often used, they are obtained by cutting the sleeve into two identical parts. They are also made from grades of lead and tin bronzes.
Bushings are the most demanded details from rolled bronze. Due to their high quality and valuable physical and chemical characteristics, excellent strength, they are used in mechanisms subjected to high loads. They are actively used in the heavy, chemical and engineering industries. Classification of bushings Bushings are classified according to two indicators: purpose and shape. According to their purpose, they are divided into the following groups: bearing; transitional; fixing. Most often, specialists are faced with bearing bushings. To improve the quality of work and increase the service life, many manufacturers use bronze alloys that have good anti-friction properties. According to the shape of the bushings are divided into:
  cylindrical; conical; threaded; split; composite. Cylindrical and conical shapes of parts are in the greatest demand in the industry. They are installed in the most important nodes of mechanisms that carry a large load. Manufacture of bronze bushings Rolled bronze in the form of bushings is in great demand in many industries. For production, several types of complex technologies are used. Bushings are produced mainly by casting: Centrifugal method - recognized as the most effective. For the production of bushings in this way, tin and aluminum bronzes are used. Large cylindrical blanks are cast into steel molds on centrifugal horizontal machines with a roller support, small ones - on cantilever-type machines. For products of complex shape, equipment with a vertically located axis of rotation is used. Centrifugal casting makes it possible to obtain homogeneous bushings that do not require additional processing. With the use of earth forms, the method is convenient for the manufacture of bronze bushings, the sizes of which vary greatly from each other - from a few centimeters in diameter to more than one meter. Most often, this method produces bushings that have large dimensions. In a chill mold using a variety of casting molds - used in the manufacture of products of complex shape. High quality is obtained from tin bronzes. Pipes for cutting bushings In addition, a method of cutting bronze pipes and folding a thin sheet of bronze is used. Bronze sliding bushings Bushings made of anti-friction materials act as plain bearings. They have a different design: smooth, with a flange and liner plates, made of different materials. Plain bearings are widely used in the production of equipment for mining and mining equipment, tractors, pumps, presses. Having a low coefficient of friction, good ductility and thermal conductivity, bronze bushings reduce the accident rate of equipment, increase the reliability and service life of the equipment. The main applications for bronze bushings are in the following industries: Mining – quarry excavators and crushers. Automotive - heavy vehicles. Railway - electric locomotives. Hydropower - production of servomotors and hydroturbines. Heavy industry - rolling mills, worm gears, cylinders, stamping and forging equipment, hydraulic presses. The practical use of bronze bushings The use of bushings in many industries contributes to the development of production. Tin bronzes are considered the highest quality raw materials, although the products are highly priced, but are in demand.
brass bushings

A brass bushing is a symmetrical piece of a cylindrical or conical shape. It has an axial hole necessary for placement in the inner part of the mating structure.
If we talk about brass alloys, they are two-component materials, which are based on zinc and copper. Additional components are alloying components that give brass products unique strength properties.
The production of bushings is carried out by metallurgical plants. The size range of such devices depends on the scope of destination, the diameter of manufactured and frequently used options varies from 35 mm to 1 m or more.
Functionally, the sleeve is part of a mechanism or machine, it provides a long service life of the unit, minimizing its failure. Brass bushing is softer than othersmi parts of the mechanism. Due to friction, it wears out faster, providing integrity to other elements.
Main advantages:

     anticorrosive properties;
     long period of use;
     affordable cost in comparison with bronze analogues.

This determines the demand for a brass product that has found a wide scope. In some cases, they are used as universal bearings, as they optimally combine functionality, quality and affordability. Such replacement bearings withstand significant loads, collapsing over time, they keep the neighboring elements of the unit intact.
The increased antifriction properties of brass bushings are noted, which can be used in a wide temperature range. They are recommended for use with light loads at high speeds and vice versa.
Criterias of choice
Brass bushings are made from various alloys that differ in mechanical and chemical values. This factor should be taken into account when choosing the described products. The cost is determined directly from the type and size range of the sleeve. It is recommended to pay attention to the following characteristics:

     temperature regime together with high-speed;
     compatibility with aggressive environments;
     oscillatory movements and their intensity;
     work in the "start-stop" mode;
     the intensity of the supply of the lubricating component;
     an indicator of the hardness of a brass fixture relative to other elements of the working unit.

Brass bushings are made at metallurgical plants. Their sizes, depending on the purpose of the finished product, vary significantly. Thus, the diameters of the bushings produced can vary from 35 mm to 1 m or more.
The sleeve, as an element of a machine or mechanism, helps to lengthen the life of the entire unit and significantly reduces the possibility of its breakdown.
The sleeve, made of brass, is less durable than the main parts of the mechanism. Being subjected to friction, it wears out faster, thereby maintaining the integrity of the remaining structural elements.
Advantages of brass bushing as details:

- high strength of the metal, which determines the long service life of the product;
- high resistance to friction and corrosion;
- low, in comparison with bronze analogs, prime cost.

Thus, brass is cheaper and more durable than copper and bronze. These qualities make her in demand.
Brass bushings are often used as multi-purpose plain bearings, providing the best balance between affordability, quality and functionality. Bearings can be subjected to sufficient loads without breaking, and if they break, they do not damage other parts of the mechanism. They have high antifriction parameters and operate in a wide range of temperatures. Suitable for modes: heavy load - low speed, light load - high speed.
Scope of brass bushings
A brass bushing is more wear-resistant and durable, as compared to a similar product made of bronze, and has enhanced anti-corrosion and anti-friction properties. In the role of plain bearings, brass bushings become the best choice due to their excellent functional characteristics and affordable price. They are used at various temperatures, optionally modified (graphite self-lubricating bushings, oil grooves).
The list of requirements for dimensions and other characteristics depends on where exactly they will be used. Industries where a brass bushing is required are pharmaceuticals, the food industry, the chemical industry and agriculture, mechanical engineering, hydropower, etc. These products are necessarily installed on important components of railway and construction equipment, mining equipment, industrial pumps and machines.