Difference Between Bushing And Bearing
Bushing and bearing are generally mixed, that is, the bushing also can be called bearing, The general wall thickness is thinner called bush more, and vice versa is called bearing more.
What Is A Bearing
Bearing is an important component in contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotary accuracy. According to the different frictional properties of moving elements, bearings can be divided into two categories: rolling bearings and sliding bearings.
What Are The Different Types Of Bushing?
PTFE Composite Bushing
PTFE bushing is a sliding bearing made of steel plate as a substrate, sintered spherical bronze powder in the middle, and rolled with a mixture of PTFE and lead on the surface. It has a small coefficient of friction, good corrosion resistance, and oil-free lubrication. The use of this product can reduce the volume of machinery, avoid the phenomenon of the gnawing shaft and reduce mechanical noise other advantages. A mixture of modified PTFE and lead (Pb) 0.01~0.03mm, a thermally conductive material that forms a transfer film to protect the shaft during operation. Used in sliding parts of various machines such as printing presses, lifts, textile machines, fitness machines, hydraulic trucks, micro motors, solenoid valves, cars, motorbikes, and agricultural and forestry machinery.
* Add notice about your Privacy Policy here
2. Metal Bearings Material
Bronze Bushing
Bronze bearings are suitable for low-speed and heavy-load applications where the shaft and bearing alignment is good, They can be made from a variety of alloy components to obtain a variety of physical properties. Bronze bushing materials include C86300 (CuZn24Al6Fe3Mn4) Manganese Bronze, C95400 (CuAl11Fe4) Aluminum Bronze, C93200 (SAE 660) Bearing Bronze, and more, learn more detail about bronze bushing bearing material now!
Cast Iron Bearing
Cast iron-bearing materials are widely used in less demanding applications. The hardness of the journal must be higher than the hardness of the shaft shank.
Sintered Bronze Bushing
The so-called “self-lubricating” “porous” bearings or sintered bronze bushings are made by first sintering metal powder and then dipping it in oil.
Graphite Bushing
Graphite bushing is a sliding bearing using copper alloy as the base, inlaid with graphite as a solid lubricant, with high load bearing, low friction coefficient, high wear resistance, low wear, and can be lubricated without oil. They are widely used in metallurgical continuous casting machines, steel rolling equipment, mining machinery, ships, steam turbines, injection molding machines, fireplace doors, oven rollers, light industry machinery, machine tool industry, and equipment production lines.
How To Select Copper Bushings?
The use of copper bushings is very common, but the material of different bearings, the function, and characteristics are different, how to select the right copper bushings, please see the following：
- aluminum bronze has high strength, high fineness, and stable chemical function. Commonly used in valve bodies, worm gears, nuts, pipe fittings, etc.
- Tin-phosphorus bronze, hardness and wear resistance are very high, can be used to make heavy loads, high speed, and higher temperature operation, subject to violent conflict parts, such as connecting rod bushings, gears, worm gears, etc.
To choose the right copper bushing, it is necessary to consider the purpose of its use and choose different types of bushings for different working conditions.
The main conditions considered in bushing selection are the pressure, speed, pressure-velocity product, and the nature of the load that the bushing needs to withstand. In addition, whether the bushing is lubricated or not, the state of lubrication also determines its effectiveness and life.
Solid Bronze Bushing Design
Solid bronze bushing is a composite of metal base material and solid lubricant. Using the complementary performance of the two materials, it can realize self-lubrication under the harsh special conditions of high temperature, low speed, and heavy load. Its design features are:
Selection and pairing of substrate material and solid lubricant.
Determination of load bearing and bearing width.
Selection of thickness and fit clearance
The area occupied by solid lubricant and arrangement, etc.
Bushings and Bearings – Applications and Industries
Plain bearings that rely on self-lubrication are theoretically capable of operating indefinitely， they are used in very critical applications if bearing failure can have serious consequences. Examples include steam turbines in power plants, engines in automobile manufacturing, etc. Sliding bearings are also often used in low-speed shaft applications, such as ship propeller shafts.
Oil-Impregnated Sintered Bronze And Solid Bronze Bushing
They range from oil-impregnated sintered bronze to designs capable of using embedded solid lubricants. The latter are often used in harsh environments such as agricultural machinery and construction machinery. Sliding bearings are often cast in bronze or pressed with metal powder and impregnated with an oil to provide film lubrication.
Choose Bushing You Need According To The Shape
According to shapes, there are four main types of bushings. Our ability to design and custom bronze bushing solutions, and our responsiveness, flexibility, and willingness to tackle customers’ tough application challenges – from very practical to highly-complex applications – are what sets us apart.
Leave A Comment