What Are Bronze Bushings Used For? Types, Applications, and Size Selection

Want to know what bronze bushings are used for? First, you need to understand what a bronze bushing is, why use bronze bushings, where they are commonly installed, and the main types of bronze bushings. After understanding these points, you will have a clearer idea of what bronze bushings are used for. Then, you can select the right option with a size chart for your application.

If you need to buy bronze bushings in bulk for OEM projects, distribution, production, maintenance, or other industrial purposes, you can contact BKZ Industry. BKZ Industry is a bearing manufacturer from China with 2 factories and 15 years of bearing manufacturing and export experience. We supply various types of bearings and bushings with stable quality and cost-effective prices. Contact BKZ Industry for bulk bronze bushing quotation.

Part 1. What Are Bronze Bushings?

Bushings are a type of plain bearing. They can be classified by material, and when bushings are made of bronze or bronze alloy, they are called bronze bushings. In simple words, bronze bushings are plain bearings or sliding bearings made from bronze or bronze alloy.

Bronze bushings are designed as sleeve bushings, which have a cylindrical shape and are installed between a shaft and a housing to support rotating or sliding movement.

Some bronze bushings come with flanges, lubrication grooves, oil holes, graphite plugs, split seams, or other custom features to improve lubrication and wear resistance.

Part 2. Why Use Bronze Bushings?

Now you know that bronze bushings are a type of plain bearing, usually with a cylindrical sleeve structure, and are made from bronze or bronze alloy. You may then want to know why bronze bushings are used instead of other bearings or bushings and why this type of bushing is needed.

To understand why bronze bushings are used, you should first understand the differences between bronze bushings and other types of bushings and bearings. Here, I will compare bronze bushings with linear bearings, roller bearings, ball bearings, brass bushings, plastic bushings, and steel bushings.

First, let us compare bronze bushings with linear bearings, roller bearings, and ball bearings to understand their structural differences and the advantages of bronze bushings.

Bronze Bushing vs Linear Bearing vs Roller Bearing vs Ball Bearings: What Are Their Differences

The table below compares bronze bushings, linear bearings, roller bearings, and ball bearings in terms of their structure, contact method, load capacity, speed, friction, lubrication, maintenance, cost, and installation requirements.

From the table, you can see that bronze bushings have a different structure and working principle from linear bearings, roller bearings, and ball bearings. Because they use sliding contact over a relatively large contact area, bronze bushings can be suitable for carrying heavy radial loads and shock loads at low to medium speeds. Self-lubricating designs require less maintenance, while bronze bushings are generally cost-effective and easy to install compared with other bearing types.

You May Also Like: Ball Bearing vs Roller Bearing: What Are Their Differences? 

After comparing bronze bushings with bearings that have different structures and working principles, the next step is to compare bronze bushings with bushings made from other materials.

Bronze Bushings vs Brass Bushings vs Plastic Bushings vs Steel Bushings

As mentioned above, bushings can be classified by material, including bronze bushings, brass bushings, plastic bushings, and steel bushings. The table below compares their main differences to explain why bronze bushings are preferred over other bushing materials in certain applications.

From the table, bronze bushings provide a good balance of load capacity, shock resistance, wear resistance, operating temperature, corrosion resistance, and service life compared with bushings made from other materials. This is why they are commonly selected for heavy-duty, low- to medium-speed applications where reliable sliding performance is required.

Also Read: Bearing Types: Sliding Bearings, Rolling Bearings, and Bearing Units 

Part 3. Where Are Bronze Bushings Used?

Now that you understand that bronze bushings are commonly used in heavy-duty, low- to medium-speed applications, you may want to know which industries and equipment use them. Bronze bushings are commonly found in machinery that requires reliable load support, shock resistance, and sliding or oscillating movement.

Here are some of the most common applications of bronze bushings:

Agricultural Machinery

• Tractors
• Combine harvesters
• Balers
• Seed drills
• Planters
• Plows
• Cultivators

Construction Machinery

• Excavators
• Wheel loaders
• Bulldozers
• Motor graders
• Cranes
• Backhoe loaders
• Dump trucks

Automotive Equipment

• Steering systems
• Suspension systems
• Transmissions
• Gearboxes
• Clutch systems
• Brake systems
• Pedal assemblies

Industrial Machinery

• Hydraulic presses
• Injection molding machines
• Pumps
• Industrial valves
• Conveyors
• Packaging machines
• Textile machinery

Part 4. What Are Bronze Bushing Types?

Bronze bushings can be classified according to different criteria, including manufacturing process, lubrication method, shape, and structure.

By Manufacturing Process

Cast Bronze Bushings: Cast bronze bushings are made from solid cast bronze and then machined to the required dimensions. The solid bronze body provides high load capacity, shock resistance, and wear resistance. Machining ensures accurate dimensions and allows lubrication grooves, oil holes, flanges, and custom features to be added.

Sintered Bronze Bushings: Sintered bronze bushings are made by pressing and sintering bronze powder to form a porous structure. The pores can retain lubricating oil, making these bushings suitable for rotating applications that require reduced maintenance.

By Lubrication Method

Oil-Impregnated Sintered Bronze Bushings: These bushings have a porous bronze structure filled with lubricating oil. During operation, the oil is released onto the sliding surface to reduce friction and wear, reducing the need for frequent external lubrication.

Graphite-Plugged Bronze Bushings: These bushings use solid graphite plugs embedded in the bronze body. During sliding movement, the graphite forms a lubricating film between the bushing and the shaft. They are suitable for heavy-load, low-speed, and oscillating applications where regular oil or grease lubrication is difficult. They are a type of self-lubricating bronze bushing.

By Shape and Structure

Straight Bronze Bushings: Straight bronze bushings have a simple cylindrical sleeve shape without a flange. They are usually pressed into a housing to support a rotating, oscillating, or sliding shaft.

Flanged Bronze Bushings: Flanged bronze bushings have a cylindrical sleeve body with a flange at one end. The flange provides axial positioning and can support axial loads at the mounting surface.

Split Bronze Bushings: Split bronze bushings have a longitudinal split or seam in the cylindrical body. The split structure allows the bushing to compress slightly during installation and fit securely into the housing.

Part 5. How to Find Bronze Bushings by Size

To find bronze bushings by size, you first need a bronze bushing size chart. Since bronze bushings do not follow one universal ISO size standard, we have listed some commonly available sizes from BKZ Industry, a bearing manufacturer with 15 years of experience, for your reference.

You can press Ctrl + F on Windows or Command + F on Mac and enter the required size to locate it quickly.

Please note that this chart only includes part of our available size range because the complete table is too long. For more sizes, materials, or customized options, contact BKZ Industry with your requirements.

Part 6. Where to Find High-quality Bronze Bushings?

After understanding what bronze bushings are used for and how they benefit different applications, the next step is finding a reliable bronze bushing manufacturer.

BKZ Industry supplies standard and customized bronze bushings for different equipment and operating conditions. Here are several reasons to choose us:

• A wide range of bronze bushing types and sizes
• Custom production based on drawings, samples, dimensions, or application requirements
• Two manufacturing factories with OEM and private-label support
• ISO 9001-certified quality management system
• More than 15 years of bearing manufacturing and export experience

Send us your bushing dimensions, drawing, material requirements, application, and quantity to receive a quotation.

Final Words

Now you should have a clear understanding of bronze bushings and their applications. Bronze bushings are suitable for heavy radial loads and shock loads at low to medium speeds. They also offer good wear resistance, corrosion resistance, long service life, and cost-effective performance.

If you need standard or customized bronze bushings, contact BKZ Industry for a quotation.