How to Choose SPB Bronze Alloy Self-Lubricating Bearings? 6 Key Features That Make Them an Industry Favorite!
How to choose SPB copper alloy self-lubricating bearings? 6 features that make it the industry's favorite!
What is SPB copper alloy self-lubricating bearing?
SPB series self-lubricated bearings (Oilless Bearings) are mainly made of copper alloys, and it is these materials that bring special properties to this type of bearings that are favored by the industry. On the SPB copper alloy self-lubricating bearing matrix, there are orderly arranged holes with stone-ground solid lubricants embedded. The lubricating oil will be released through the holes when the bearing is running, reducing the friction generated by the parts during operation. Therefore, it is particularly suitable for working parts where it is difficult to apply lubricants.
What are the characteristics of copper alloy self-lubricating bearings?
The biggest feature of this bearing is that it is made of special brass alloy, which creates its irreplaceable excellent properties.
- High temperature resistant, able to withstand temperatures ranging from -40 to 300 degrees Celsius.
- Strong corrosion and chemical resistance, suitable for harsh working environments.
- It has excellent anti-wear properties and a low friction coefficient, as well as extremely high load capacity.
- Can be used for a long time without oil supply.
- Suitable for reciprocating, rotary and intermittent motion applications where it is difficult to form an oil film.
- Low maintenance rate and long service life.
Application industries of SPB self-lubricating bearings
As mentioned above, due to the characteristics of this type of copper alloy self-lubricating bearing, it can still be used in a variety of complex working environments, such as: steel mills, powder metallurgy equipment, transmission rails, textile machinery, automobile parts manufacturing and automation machinery and other different industries.
How to choose SPB copper alloy self-lubricating bearings?
1. Understanding SPB (JDB) product models
Before selecting bearings, we need to first understand the product model identification logic of SPB self-lubricating bearings. SPB is the English product name of this series of self-lubricating bushings. JDB is also a common model name. The last six digits represent the inner diameter, outer diameter and length of the bearing respectively.
2. Selection of Mating Shaft
For general heavy-load applications, the industry can use the international shaft tolerance d8 grade as the standard when selecting matching shafts; while for general light-load applications, it is appropriate to use the tolerance value of e7 as a reference standard to select the appropriate matching shaft. If there are higher requirements for precision, the industry can use the f7 grade with a smaller tolerance as the standard for selecting matching shafts.
3. Hole position tolerance
The selection of matching shafts is inextricably linked to hole deviation. Industry players should note that the hole deviation range of SPB self-lubricating bearings used in the industry is generally H7. If the hole position deviation is ignored, it will directly affect the tightness of the parts assembly.
4. Use with SPW thrust washers
When the SPB copper alloy self-lubricating bearing moves axially for a long time, the axial load and friction will increase, which may cause the bearing to shift. If SPB bearings are used with SPW thrust washers, related problems can be effectively solved. SPW thrust washers are also made of high-strength brass alloy as the main material and have excellent wear resistance.
5. Selection of solid lubricants
The chemical raw materials of common solid lubricants are graphite (C), molybdenum dioxide (MoS2) and polytetrafluoroethylene (PTFE). High-purity graphite has excellent wear resistance and high temperature resistance. If it is used in a general working environment, the industry can choose a solid lubricant based on graphite. If it is a mechanical part operating in water or a relatively humid environment, you can choose a self-lubricating bearing with molybdenum disulfide as the lubricant base, because this chemical raw material can be used normally even in water vapor and vacuum conditions.
Summary
In actual industrial applications, the general cause of bearing failure is that the lubrication work is not handled properly and the friction is not alleviated. SPB copper alloy self-lubricating bearings eliminate the need for manual lubrication and are able to withstand a variety of harsh working environments, making them very competitive in performance. In order to meet customers' requirements for different sizes, Antong also provides customized SPB self-lubricating bearings. If you have any questions, please contact us!