The possible combinations of different metals are varied, not only because of the choice of base metals and their combinations but also because these metals can be used in different proportions. Given this diversity and lack of metallurgical detail, detailed comparisons are beyond the scope of this blog. However, here is a rough overview of some common alloys and their specifications:
CuSn7Zn4Pb7- Bronze DIN EN 1982 (CC493K)
The most common and cost-effective red bronze (bronze) alloy is used for plain bearings.
Good emergency operation and adequate wear resistance under moderate load.
Also suitable for unhardened shafts and light edge pressures.
Tough bearing material with good sliding properties and good wear resistanceEspecially suitable for high surface pressures and simultaneous shocks
Very good sliding properties, high wear resistance, and good heat resistance.
Suitable for high speed and high load if well lubricated and with hardened shaft
Especially suitable for thin-wall bushings
Depending on its specifications, there are many other variants suitable for a wide range of applications.
Bronze bushing compared with plastic bushing
It is difficult to make a meaningful comparison between the two material groups purely on the basis of individual technical values. Like most metal bushings, bushings made of bronze or similar alloys have higher mechanical strength values and — at least when lubricated — better PV values. Therefore, frame conditions should be considered first. For example, polymer bushings can often be cost-saving because lubrication may not be required and are more cost-effective to produce. In addition, depending on the polymer compound, the pure material cost can also be significantly more cost-effective. Eliminating the need for external supply lubrication also brings further advantages in bushing reliability and maintenance. In addition,
Advantages and disadvantages of the bronze sleeve and solid bearing and plastic sleeve
Higher intensity values
Better PV value (if lubricated)
May have higher surface velocity (if lubricated)
More complex and therefore more expensive to manufacture (lubrication grooves or holes)
Increase the weight
Corrosion resistance (depends on the alloy)
Non-Rohs (depends on the alloy)
Looking for the best plain bearing? We are happy to help you!
In every plain bearing application, these advantages and disadvantages must be weighed. However, not all of these aspects play a role in every application. In addition to bronze bushing, bronze bushing or other solid bearings, there are other bearing types that have other advantages and disadvantages.
Different types of plain bearings are suitable for different applications with different specifications. There is often application overlap – but it is not uncommon to see significant differences in life and performance.
Our application specialists will be happy to advise you and design your bearing point with you. We will identify common casing for you with the best service life, cost and performance ratio – by phone, digital access or in your field. Free and no obligation. Everything comes from one source.