Oilless bushing, or “sliding bearings,” are oil-free and wear-free products used to reduce friction in the system. Graphite with bronze is a material with a very low coefficient of friction that reduces wear on both the shaft and the body of the rod. It has been developed for high-load, low-speed applications and is made of rotational cast high-strength bronze using a specially formed graphite plug as a lubricant.
Oilless Bushing, incorporate high-quality copper alloy-based metals with engineered solid lubricant plugs. These bearings are designed to accommodate a wide variety of application requirements demanded by today’s equipment. Precise tolerances utilizing strategic plug location and plug compounds ensure performance delivery and lubrication-free service. This bearing style is available in standard inch, metric, and made-to-order sizes. It provides extreme temperature limits and high load capacity performance. Available in journal-style bearings and flat wear plates.
Say Goodbye to Friction with Our Oilless Bushings
Are you tired of dealing with the constant maintenance and lubrication required for traditional bushings? Our oilless bushings are here to solve your problems. With our innovative design, our bushings require no lubrication, making maintenance a breeze. Plus, our bushings are made with high-quality materials that reduce friction and wear, ensuring long-lasting performance.
Don’t let friction slow you down. Upgrade to our oilless bushings and enjoy smooth operation and less downtime. And with our easy installation process, you’ll be up and running in no time.
Material Features
·Allows maintenance-free and long-life operation ·Suitable for high static and dynamic loads ·With a low and smooth coefficient of friction and without stick-slip effects ·Suitable for dirty, corrosion, impact load, and edge loading ·The base material provided a good shock-absorbing capacity ·Can be used over a large temperature range ·Suitable for reciprocating, rotating, and oscillating movement with start frequency and difficulty to form oil film occasions ·With low wear rate and long life service.
How does It work?
When mutual friction occurs between two non-lubricated surfaces, the two contract with the uneven surface of the peak by the shear, stick-slip and plastic deformation giving rise to friction and wear. Conventional lubricants can significantly reduce these effects, however, the conventional lubricant will be more and more squeezed out of the contact area with an increasing surface which formed dry friction or boundary lubrication.
Types of Oilless Bushings
Self-lubricating bushings, also known as oilless bushings or dry bearings, are utilized in a range of industries for circumstances where traditional lubrication methods are unfeasible or not desirable. These bushings offer exceptional resistance to wear and low friction levels, all without the requirement of any supplementary lubrication. The market provides a variety of oilless bushing options, with each type catering to specific applications.
1. Graphite Bronze Bushing
A graphite bronze bushing is a type of oilless bushing that is composed of a bronze alloy with graphite added. This combination provides the bushing with self-lubricating properties and improved wear resistance. Graphite bronze bushings are commonly used in high-load, low-speed applications, such as in the automotive and construction industries, where conventional lubrication is difficult or impossible. They are also known for their durability and ability to withstand harsh environmental conditions.
2. Casting Bronze Bushings
An oil-free casting bronze bushing is a type of bushing that is made from a bronze alloy and does not require any additional lubrication to function properly. This is achieved through a unique manufacturing process that results in a porous structure that acts as a lubricant reservoir. The casting process also allows for complex shapes and designs to be achieved, making these bushings suitable for a wide range of applications. Oil-free casting bronze bushings are commonly used in heavy-duty equipment, such as construction machinery and mining equipment, due to their high load capacity and resistance to wear and corrosion.
3. Sintered bronze bushings
Sintered bronze bushings are made by compressing bronze powder and then heating it to form a porous structure. The pores are then impregnated with solid lubricants such as graphite or PTFE. These bushings offer good wear resistance, heat dissipation, and load-bearing capabilities.
4. Bimetal bushings
Bimetal bushings consist of two layers of different metals. Typically, the inner layer is made of a low-friction, wear-resistant material (such as a copper or tin alloy), while the outer layer is made of a stronger, more durable metal (such as steel). Bimetal bushings offer a combination of low friction, wear resistance, and high load-bearing capabilities.
Typical Applications
The product is widely used in continuous casting rolling machines, mining machinery, shipping machinery, turbine, injection machinery, auto mold, and so on.
Structure
CuZn25Al6Mn4 Bronze with solid graphite lubricant inserts (alternative specifications are available on request)
PV (N/mm² x m/s)
3.3 max
Static load (N/mm²)
100 max
Sliding speed (m/s)
0.3 max
Operating temperature (°C)
Up to 300 (alternative specs up to 400)
Coefficient of thermal expansion
19 x 10-5/°C
Coefficient of friction
0.16
Hardness (HB)
210 min
Tensile strength (N/mm²)
750 min
Elongation (%)
12 min
Density (g/cm³)
8
Basic Advantages of Oilless Bearings
In the industrial world, there are various types of bearings to choose from. The application of machinery that you are running, will dictate what bearing you purchase. Oilless bearings are manufactured from a material that incorporates lubrication in the form of powdered graphite. These types of bearings are also known as self-lubricating bearings. As a result, there is no oil or external lubricant required for these bearings to operate at their best. Some of the basic advantages of making use of these types of bearings are as follows:
There is little to no extra lubrication required for the bearing to be functional.
Friction is well-managed by these bearings and resistance performance is good.
Mechanical accuracy can be ensured with the quick and effective response and functioning of the bearing.
Oilless bearings can reduce mechanical vibration and reduce operating noise. In many industries, this type of bearing is in demand. At VIIPLUS, we present a range of durable and reliable bearings to the market. Each of these is designed to offer a long service life and will certainly not let you down. We design, manufacture, and supply a range of composite self-lubricating bearings that we have absolute confidence in. Our head office is based in China and we currently present our products to various countries, including marine, petrochemical, mining, iron and steel, civil, automotive, and materials handling.
Get A Free Quote With Bronzeoilless.com
We are an international concern with our focus on manufacturing our products according to strict ISO requirements. For the peace of mind of our clients, we ensure that our ISO certificates and BEE status are made available for perusal on our website.
When it comes to choosing bearings for your industry and the application that you are running, it is best to know precisely what you are looking for. If you are unsure, we always encourage clients to chat with us about their requirements and the demands of their industry, so that we can advise them on viable products and processes.
If you are looking for a range of oilless bearings that simply will not let you down, then VIIPLUS has just what you need. Take the time to chat with one of our knowledgeable consultants about our range of bearings and soon you will be provided with a product that perfectly manages the task at hand. At VIIPLUS, we are pioneers of technology and want nothing more than to provide you with a product and service that is effective and offers value for money.
