Sand Casting and Centrifugal Casting
One of the oldest man-made alloys, bronze traditionally consisted of only copper and tin, but today’s bronze alloys may contain copper mixed with aluminum, manganese, silicon and a range of other materials, depending on the properties required for the intended application of the alloy. Bronze is easily molded, has a low metal-to-metal friction rating, and can withstand pressure and stress, making it ideal for a wide range of industrial and artistic applications.
Bronze can be molded into complex shapes by a technique known as casting. In this process, molten bronze is poured into a mold. After cooling, the bronze solidifies and the mold is removed, leaving only the predetermined shape.
Industrial bronze casting
Modern sand casting is still largely based on the bronze casting method used in ancient times. It begins by creating a pattern in the sand and then a mold is made from the sand. Next, a bronze liquid is poured into a hollow mold. Once the metal cools, the mold is removed, leaving the bronze behind, known as “sand casting. Although this method is time consuming, it can create a wide variety of shapes that other processes may not be able to do.
Centrifugal casting is the preferred method for creating cylindrical bronze bearings. As the molten bronze is poured in, a cylindrical mold rotates around an axis at a constant speed. This method produces parts with a circular inner diameter. Undesirable impurities and foreign matter in the alloy usually collect in this inner ring and can be removed by secondary machining, which is an advantage of this casting process. However, the size and shape of the items produced by centrifugal casting is limited.
Seek to determine which bronze bearing casting process will be suitable to create a product to meet your needs.
Choose your cast bronze bushing bearing material
Self-lubricating graphite bronze sleeve non-standard bushing eight-character oil groove wear-resistant bushing
There are many kinds of bronze bushing sleeves, including machine bronze bushing, bronze bearings, etc. Oil lubricated bearings are used in various large and heavy machinery and are an important component of machinery.
Custom Bearing forms made to order: cylindrical bushes, flanged bushes, thrust washers, sliding plates, pintle bearings, half-bearings, axial and radial segment rings, self-aligning spherical bearings, customized bearing designs
Bronze bearing, also known as bronze bushings, are divided into many types, including machine bronze rollers, bronze bearings, etc. It is used in various light industry, large and heavy machinery and is an important component of machinery. The product has the traditional tin bronze bearing function. It is made of electrolytic bronze as raw material with various trace metal elements, sintered at high temperature, and processed by air pressure centrifugal casting. High hardness, excellent wear resistance, not easy to cause seizure, good casting performance and cutting performance, and good corrosion resistance in the atmosphere and fresh water. In the absence of lubricants and water-based lubricants, it has good sliding properties and self-lubricating properties, easy cutting, poor casting properties, and good corrosion resistance to dilute sulfuric acid. Structural parts for general purposes, simple-shaped castings used in ships, instruments, etc., such as sleeves, bushings, bearing bushes, sliders, etc.
Bronze Bushing Material:
The bronze bushing material is as follows:
High hardness, excellent wear resistance, not easy to cause seizure, good casting performance and cutting performance, and good corrosion resistance in the atmosphere and fresh water.
Can be used for wear-resistant parts that work under high load (below 20Mpa) and high sliding speed (8m/s), such as connecting rods, bushings, bearing bushes, gears, worm gears, etc.
Corrosion resistance, especially to dilute sulfuric acid, hydrochloric acid and fatty acid.
Structural materials, corrosion-resistant and acid-resistant accessories, as well as crusher bushings and bearing bushes.
Good lubricity, wear resistance and corrosion resistance, suitable for bimetal casting materials.
Vehicle bearings, internal combustion engine bimetallic bearing bushes with a peak load of 100Mpa, piston pin sleeves, friction plates, etc.
In the absence of lubricants and water-based lubricants, it has good sliding properties and self-lubricating properties, easy cutting, poor casting properties, and good corrosion resistance to dilute sulfuric acid.
Bearings with high surface pressure and side pressure can be used to manufacture copper cooling pipes of cold rolling mills, parts with impact load up to 50Mpa, bimetal bearing bushes of internal combustion engines, mainly used for piston pin sleeves with load up to 70Mpa, acid-resistant accessories.
It has good mechanical properties and corrosion resistance, good wear resistance and good cutting performance.
General-purpose structural parts, simple-shaped castings used in ships, instruments, etc., such as sleeves, bushings, bearing bushes, sliders, etc.
JDB-1U oil groove bronze bushing copper sleeve is a kind of bronze bearing lubricated by oil groove oil. The product has the function of traditional tin bronze bearing. Since the high-strength brass (ZCuZn25Al6) is used, its HB hardness is doubled, so using this product in low-speed situations can double the life of the general bronze sleeve, and its The bearing pressure is large, and it can be used in heavy-duty occasions. This product is made of electrolytic copper as raw material with various trace metal elements, sintered at high temperature, and processed by air pressure centrifugal casting.
The products are widely used in textile machinery, injection molding machinery, mining machinery, construction machinery, automobile industry and other fields. The company can choose various grades from China, Germany, Japan, the United States and other countries to make Bronze Bushing, washers, skateboards, half tiles and other products according to customers. Various oil grooves and oil filling holes can be processed on the inner and outer walls according to customer requirements, and can also be processed according to drawings.
Typical use: High purity graphite + additives. SL1 Graphite+add
Good wear resistance and chemical stability, use temperature < 400 ℃
Applied to general machinery, used in the atmosphere
- S L 4 + M o S 2
- P T F E + M o S 2 + C F
Very low coefficient of friction and good water wettability, operating temperature <300℃
Bronze vs. Brass – What’s the Difference? bearing material
Bronze vs. brass
Although these metals are related in composition, appearance, and even application, brass and bronze are often used for different purposes. Thermal conductivity is a good measure to know if a metal will be used in a thermal application because it shows how much energy can be transferred through the material, and at what rate. Brass has a much higher thermal conductivity than bronze, making it an ideal choice for heat sinks. Bronze can also be used for thermal applications, but if the choice is between the two, brass will always take precedence.
Fatigue stress is a stress caused by high cycling of small stresses, which can cause microscopic or even macroscopic fractures to the material over a long period of time. If the material will be under constant stress, such as frequent changes in temperature or load, this value is crucial to understand the integrity of the material, because as long as there is enough cycling, it will chip away at the integrity of the alloy. The fatigue strength ranges for bronze and brass are given in Table 1, as each metal has many alloys. Bronze typically has higher fatigue resistance than brass, as can be seen by comparing the lower limits of their fatigue strength ranges. This property makes bronze more suitable for marine components and springs, which are subjected to constant stress during use.
Brass has a lower average melting point than bronze (917 vs. 1010°C), but they are both easy to cast. If either of these two metals is used to cast a shape, consider the mechanical properties required; a more resilient project is most likely to benefit from bronze, while a more decorative project can use brass to great effect.
Hardness is a measure of how a material responds to local surface stresses, and how it reacts to scratches, dents, etc. The Brinell hardness tester is one of many hardness testers that use their own hardness indenter to rate the material’s response to standard forces. For reference, a typical glass scores 1500 on the Brinell hardness tester, while lead scores 5; using these as a benchmark, Table 1 clearly shows that bronze has a higher average hardness than brass. Harder materials are usually more brittle, and bronze follows this rule and breaks more easily than brass. If machinability is a necessity, then brass is a better choice than bronze. However, if strength and wear resistance are concerns, bronze may be a better choice.
Machinability is a comparative score given to metals to show how they respond to machining stresses such as turning, milling, stamping and other procedures. It is important to know a metal’s machinability score because it determines what types of machining, if any, can be performed. A metal’s machinability percentage is compared to a reference metal that is given a rating of 100% (easy to machine). A metal that is more difficult to machine is given a rating of less than 100%, as is the case with both bronze and brass. There are some alloys that were developed specifically for machining (such as brass alloy C360), but most copper alloys are too ductile to machine. Both of these metals have excellent casting properties, so consider the casting procedure before machining these metals. If machining is necessary, make sure the alloy you choose is made for machining, or you risk gumming up your mill.
Both bronze and brass come in many shapes, sizes and compositions. As always, ask your supplier for the latest information on what is available and which type of bronze or brass will work best for your application.
Attention should be paid to the processing of custom bronze bushing:
Everyone knows bronze set of high hardness, good wear resistance, it is not easy to produce killed the phenomenon, and it also has good casting properties and cutting the processing performance of it has strong corrosion resistance so it in the manufacturing process of the work is also very carefully, so in the process of its craft manufacturing we should need to pay attention to what?The first point: when casting the bronze bushing, each process must be carefully handled. For example, it is required to put the core right in the box to avoid the casting product cannot be processed according to the size due to this reason.The second point: before processing, the castings should be cleaned first, and then the castings should be put on the train. After the correction, the castings should be put on the train when the semi-finished products are processed, and then the castings should be cooled. Because the bronze has shrinkage property, the castings should be put on the train again at room temperature for accurate processing.The third point: after the finished product, especially the straight sleeve should be placed vertically if it cannot be placed horizontally to prevent deformation.The fourth point: packaging, to leave the quantity, avoid in the process of transport by the collision caused by the unexpected deformation.
Bronze Bushing & Bronze Bearing Pursue high technology & good brand, combine the best quality products & reasonable price. we warmly welcome the domestic and international merchants came to hold business talks. Short & Reliable Delivery. Safety Quality Assurance.
Bronze bushing divided into many type, including machine bronze bushing, custom bronze bearing and so on. Oil-lubricated bearings, used in various large and heavy machinery, is an important part of machinery. Bronze bushing sleeve, also known as bushes bronze sleeve, is divided into many types of bronze bushing, including machine bronze bushes, bronze bearing and so on. Used in all kinds of light industry, large, heavy machinery, is an important part of machinery. The custom bronze bushing product has the traditional tin-bronze bearing function, taking electrolytic bronze as raw material with a variety of trace metal elements, after high temperature sintering, through the pressure centrifugal casting processing. High hardness, excellent wear resistance, not easy to kill the phenomenon, has good casting performance and cutting performance, in the atmosphere and fresh water has good corrosion resistance. In the absence of lubricant and water lubricant conditions, good sliding and self-lubricating performance, easy cutting, poor casting performance, good corrosion resistance to dilute sulfuric acid. Structural bronze parts for general use, castings of simple appearance used in ships and instruments, such as sleeves, bushings, bearing bushes, sliders, etc.
Cast Bronze Bearings with Solid Lubricant Inserts! Maintenance-free bearing material for heavy duty applications Excellent performance under high loads and intermittent operation.
Also available with graphite inserts for temperatures above 250°C. Maintenance free bronze bearings with graphite grooves and graphite plugs are available. Graphite acts as a dry lubricant and provides permanent, maintenance-free lubrication. The internal grooves can be filled with a special curable graphite paste. Graphite plugs can be pressed into the bearing wall using a special epoxy resin binder. Typical plunger diameter is 7mm with 25% surface coverage. The graphite plugs can be placed around special features of your parts. Graphite bronze parts should be run dry with no oil or grease. Our graphite plug bearings typically have a coefficient of friction between 0.10 and 0.15, depending on a variety of factors affecting performance. Oil grooves are typically wider and deeper than oil grooves. This is to hold a supply of fat and ensure that the thick fat is pushed in. Oil grooves typically vary in width but are shallower than grease grooves. Most oil grooves operate in a constant loss or closed
Custom Size Options, machining bronze bushings and a supplier of solid bronze oilless bushes and plate delivered on time and on budget.
Solid Bronze Bearing Applications
Solid Bronze Bearing Applications
Solid bronze bearings are ideal for oscillating applications, both axial and radial. General applications:
Advantages of solid bronze bearings
The main advantages of solid bronze bearings include:
Unaffected by impurities
Suitable for corrosive environments
Suitable for shock loads and vibrations at low speeds
Has a groove to retain the lubricant