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Product Spotlight: Cast Bronze Bearings

A lot of the technology we use today is relatively recent, popping up for the first time around the Industrial Revolution and then undergoing refinement and innovation until ending up where it is today. Cast bronze bearings, however, have been used in some form or another for hundreds of years.

Bronze bearings come in all sorts of shapes and sizes, including sleeve bearings, split bearings, flanged bearings, thrust washers, and wear plates. Custom oil grooves, threading, and drill holes are available on certain bronze bearings, as well.

The bottom line is that these are an essential part of many machines, and we just so happen to provide some truly excellent bronze bearings here at Diversified Bronze.

Choosing Cast Bronze Bearings

Knowing which cast bronze bearings to choose depends on the service conditions, the required material properties, and the type of bronze. While not all of these conditions can be known before buying these materials, an accurate prediction will be essential in purchasing the right bronze bearings.

Service Conditions

The first thing to consider when determining what bronze bearings may be necessary for a certain machine are the service conditions. According to, the following service conditions are the ones that can have the biggest impact on which bearings are the best fit:

  • Oscillating motion, especially those that fall short of full revolutions.
  • Environments that may prove corrosive to the metal.
  • Dirty environments, or environments that may require lubrication.
  • Inconsistent supplies of lubricants.
  • Temperature.
  • Machines that experience frequent stops and starts.
  • Shafts that can grow misaligned.

Knowing which of these environmental factors may affect your bearings can go a long way toward choosing the right ones.

Material Properties

The metals and other materials in machines also can affect which bronze bearings are most appropriate for a certain project. For example, we may look at any disparity between the hardness of the metals in use, as well as how that may impact the coefficient of friction between those two metals.

Other considerations include the material’s ability to absorb and discard small contaminant particles, its high compressive strength, its high fatigue strength, its corrosion resistance, its low shear strength, its structural uniformity and its cost and availability. Needless to say, we offer a number of bronze bearings that can work for each of these conditions.

Types of Bronze

The final consideration comes in the form of bronze types, of which there are many. Different alloys are better for all of the varying conditions listed above, with different metals helping to add certain qualities to the bronze. Tin bronzes, leaded tin bronzes, high-leaded tin bronzes, aluminum bronzes, and manganese bronzes all perform differently in action, giving each machine exactly what it needs to run as well as designed.

If a business needs any help determining what their needs are from their bronze bearings suppliers, we always are happy to help. At Diversified Bronze, we hold ourselves to a high standard in both service and product quality, especially when it comes to our cast bronze bearings.

Selecting The Best Bronze Bearings Materials: What You Need to Know

Bronze bearings are everywhere in machine design because they are, quite frankly, essential to keeping these machines from falling apart. Without them, the range of movement for certain mechanics would be way outside of the desired motion, increasing friction between various moving parts and wreaking all sorts of havoc on the machine itself. These bearings are absolutely necessary, and some type of bronze very often is the material of choice for manufacturing them.

Choosing a Bronze Bearing Material

It is not as easy as choosing bronze as a bearing material, however. Bronze bearings come in a number of different alloys to be used for different purposes. The following is a quick rundown of which alloys are best in certain circumstances:

Tin Bronzes

Adding tin to a bearing bronze alloy essentially serves the purpose of strengthening the metal. Tin bronzes are, as a result, very strong, but they also are hard and boast a high ductility, all of which makes them good for carrying heavier loads and holding up well over time, even in machines that really pound. They also perform especially well in seawater and brine.

Leaded Tin Bronzes

There are some tin bronzes that actually add a little bit of lead, which sounds as though it would add strength but in reality improves machinability, meaning it is easier to be cut and removed if needed at relatively low cost to the owner of the machine. Some leaded bronzes also contain some zinc, which is a way of strengthening the bearings more affordably than tin alone.

High-Leaded Tin Bronzes

There is significant demand for high-leaded tin bronzes because they are so versatile in a number of general applications at medium speeds and carrying medium loads. The strength and hardness of bronzes in this category are sacrificed a bit in favor of better anti-friction and machining properties, but all in all they are excellent bearings that work well in a number of circumstances.

Aluminum Bronzes

As the strongest of the bearing bronze alloys, aluminum bronzes are the only ones capable of being heat treated. That extra strength also allows them to deal with loads up to 50 percent higher than leaded tin alloys, meaning for heavier-duty jobs the aluminum bronze alloys are a smart, reasonable choice. They do come at the sacrifice of ductility and conformity, but for strength there’s no better option.

Manganese Bronzes

Perhaps the most complicated alloys in terms of makeup, the manganese bronze bearings feature zinc and small amounts of manganese, iron, aluminum and lead, all of which combine to create a bearing bronze that is strong, can operate at high speeds, can support heavy loads and can resist corrosion. They don’t deal with abrasion well, though, so the accompanying shafts need to be hard and relatively stationary.

Here at Diversified Bronze, we work with many of these different types of bronze bearings, and we are happy to answer any questions about which of these may be best for a certain type of machine. Simply reach out to us any time to ensure that your products maintain their integrity over time because of the high quality of bearing bronze used in the manufacturing process. Check out our Cast Bronze Bearings @