High-Quality Brass Bushings by Size

Looking for brass bushings that guarantee reliability and seamless performance? Our brass bushings by size selection offers exactly that. Whether you’re working with automotive, industrial, or mechanical applications, each bushing is meticulously designed for durability and longevity. Custom-fit options ensure you find the perfect size, giving you peace of mind that your machinery will run smoothly and efficiently. No more guessing sizes—our extensive range ensures you find the right match every time.

Email

una@viiplus.com

Types of Brass Bushings

Brass Bushing Sizes: Standard and Custom Options

  • Plain Sleeve Bushings

Description: Simple cylindrical bushings without flanges or lubrication features, designed for general-purpose applications requiring alignment and rotational support.
Applications: Used in shaft supports, pivot points, and low-load machinery.
Material: Made from solid brass or bronze alloys for improved wear resistance.

  • Flanged Bushings

Description: Designed with a flange (washer-like plate) at one end to prevent axial movement and provide additional stability.
Applications: Commonly used in automotive suspensions, conveyor systems, and machinery requiring precise alignment.

  • Brass Washers

A variety of brass washers available in multiple sizes, including standard flat washers conforming to DIN 125. Custom sizes can be ordered and are supplied worldwide.

  • Self-Lubricating Brass Bushings

Description: Contain embedded graphite plugs or sintered lubricants to reduce friction without the need for external lubrication.
Advantages:

  • Maintenance-free operation, ideal for inaccessible areas.

  • High wear resistance and excellent thermal conductivity.

  • Suitable for high-load or high-speed applications, such as construction machinery and printing presses.
    Material: Manufactured from bronze or brass alloys with graphite inserts for enhanced durability.

brass washers indispensable in high-performance mechanical assemblies, offering unmatched durability and adaptability.
self lubricating c36000 brass plate

Custom CNC machining brass sleeve bushing

brass bushing – from micro to oversized

1 inch ID x 1.5 inch OD C93200 SAE660 Brass Bushing

Customization and Applications of Brass Bushings by Size

Customizing the size of brass bushings is essential for ensuring optimal equipment performance and reliability. Different working environments and stress conditions in machinery call for varying requirements in the bushing’s dimensions, shape, and functionality. By customizing according to specific drawings or samples, Bronzeoilless.com’s bushings can be perfectly matched to the equipment, improving both operational efficiency and longevity.

Can’t find the right size? We offer a full range of brass bushings, from micro to oversized. Whether you need standard stock or precision custom parts, we guarantee precise tolerances.

Size Not Listed? Go Custom

Brass Bushing By Sizes: Standard Charts & Custom Solutions

Standard Metric Bushing Size Chart (Common)

While custom sizes exist, most “off-the-shelf” brass or bronze bushings follow these increments:

Inside Diameter (ID) Outside Diameter (OD) Typical Lengths (L)
3 mm 5 mm – 6 mm 4 mm, 6 mm, 10 mm
5 mm 7 mm – 8 mm 5 mm, 8 mm, 12 mm
8 mm 10 mm – 12 mm 8 mm, 12 mm, 15 mm
10 mm 12 mm – 16 mm 10 mm, 15 mm, 20 mm
12 mm 14 mm – 18 mm 12 mm, 20 mm, 25 mm
20 mm 24 mm – 28 mm 15 mm, 25 mm, 40 mm
30 mm 35 mm – 40 mm 20 mm, 30 mm, 50 mm

Common Imperial Size Chart (Standard SAE)

Most “off-the-shelf” brass or bronze bushings follow these standard increments.

ID (Inches) OD (Inches) Common Lengths (Inches)
1/4″ 3/8″ 1/4″, 1/2″, 3/4″
5/16″ 7/16″ 1/2″, 3/4″, 1″
3/8″ 1/2″ 1/2″, 3/4″, 1″, 1-1/2″
1/2″ 5/8″ or 3/4″ 1/2″, 3/4″, 1″, 1-1/4″
5/8″ 3/4″ or 7/8″ 3/4″, 1″, 1-1/2″
3/4″ 1″ 1″, 1-1/4″, 1-1/2″
1″ 1-1/4″ or 1-3/8″ 1″, 1-1/2″, 2″

Brass Bushings Straight Specifications

Description Inner Diameter (Ød) Outer Diameter (ØD) Overall Length (L) (mm) RoHS Compliant
Brass Bushings Straight 5 9 8 Yes
Brass Bushings Straight 5 9 10 Yes
Brass Bushings Straight 5 9 12 Yes
Brass Bushings Straight 5 9 15 Yes
Brass Bushings Straight 6 10 8 Yes
Brass Bushings Straight 6 10 10 Yes
Brass Bushings Straight 6 10 12 Yes
Brass Bushings Straight 6 10 15 Yes
Brass Bushings Straight 6 10 20 Yes
Brass Bushings Straight 8 12 8 Yes
Brass Bushings Straight 8 12 10 Yes
Brass Bushings Straight 8 12 12 Yes
Brass Bushings Straight 8 12 15 Yes
Brass Bushings Straight 8 12 20 Yes
Brass Bushings Straight 8 12 25 Yes
Brass Bushings Straight 10 14 8 Yes
Brass Bushings Straight 10 14 10 Yes
Brass Bushings Straight 10 14 12 Yes
Brass Bushings Straight 10 14 15 Yes
Brass Bushings Straight 10 14 20 Yes
Brass Bushings Straight 10 14 25 Yes
Brass Bushings Straight 12 18 10 Yes
Brass Bushings Straight 12 18 12 Yes
Brass Bushings Straight 12 18 15 Yes
Brass Bushings Straight 12 18 20 Yes
Brass Bushings Straight 12 18 25 Yes
Brass Bushings Straight 13 19 15 Yes
Brass Bushings Straight 13 19 20 Yes
Brass Bushings Straight 15 21 10 Yes
Brass Bushings Straight 15 21 12 Yes
Brass Bushings Straight 15 21 15 Yes
Brass Bushings Straight 15 21 20 Yes
Brass Bushings Straight 15 21 25 Yes
Brass Bushings Straight 16 22 10 Yes
Brass Bushings Straight 16 22 12 Yes
Brass Bushings Straight 16 22 15 Yes
Brass Bushings Straight 16 22 20 Yes
Brass Bushings Straight 16 22 25 Yes
Brass Bushings Straight 16 22 30 Yes
Brass Bushings Straight 16 22 40 Yes
Brass Bushings Straight 20 28 15 Yes
Brass Bushings Straight 20 28 20 Yes
Brass Bushings Straight 20 28 25 Yes
Brass Bushings Straight 20 28 30 Yes
Brass Bushings Straight 20 28 40 Yes
Brass Bushings Straight 20 28 50 Yes
Brass Bushings Straight 25 33 20 Yes
Brass Bushings Straight 25 33 25 Yes
Brass Bushings Straight 25 33 30 Yes
Brass Bushings Straight 25 33 40 Yes
Brass Bushings Straight 25 33 50 Yes
Brass Bushings Straight 30 38 25 Yes
Brass Bushings Straight 30 38 30 Yes
Brass Bushings Straight 30 38 40 Yes
Brass Bushings Straight 30 38 50 Yes
Brass Bushings Straight 30 38 60 Yes

Brass Bushings Shouldered Size Chart

Part Number Housing Diameter
Type dE7 L Dr6 Wall Thickness(N) H t Reference Dimension Tolerance (H7)
Brass Bushings Shouldered 5 +0.032
+0.020		 10 12 9 2 14 2 9 +0.015
0
6 10 12 15 10 16 10
8 +0.040
+0.025		 10 12 15 20 12 20 12 ‘+0.018
0
10 10 12 15 20 14 22 14
12 +0.050
+0.032		 10 12 15 20 25 30 18 3 25 3 18
13 12 15 20 19 26 19 +0.021
0
15 10 12 15 20 25 21 28 21
16 12 15 20 25 30 22 29 22
20 +0.061
+0.040		 15 20 25 30 40 30 5 40 5 30
25 30 40 50 35 45 35 ‘+0.025
0
30 30 40 50 40 50 40

While we offer a comprehensive catalog of standard brass bushings by size, we understand that high-performance machinery often requires non-standard solutions. Our custom machining services are optimized for:

  • Thin-Wall Precision: Expert handling of delicate, lightweight bushings without deforming.
  • Complex Geometries: Including flanged bushings for axial load support.
  • Lubrication Management: Custom internal or external oil grooves (figure-8, loop, or straight) to extend component life.

Stop searching for a ‘close enough’ size. Upload your drawing and let us machine the exact part you need.

Suggested Searches: Copper， Brass， Bronze， Copper Nickel， Manganese， Aluminum

Why Large-Sized Brass Bushings Must Consider Thermal Expansion: The Impact of CTE

All materials undergo dimensional changes when subjected to temperature fluctuations, making the Coefficient of Thermal Expansion (CTE) of brass a critical factor in the design of large-sized bushings. Experimental data indicates that the linear expansion coefficient of brass typically ranges between 17.5×10⁻⁶/°C and 18.4×10⁻⁶/°C. Notably, this value is slightly higher than that of pure copper (17.2×10⁻⁶/°C) but lower than aluminum alloys (23.6×10⁻⁶/°C).

1. The Significant Impact on Large Dimensions

Thermal expansion effects are particularly pronounced in large-scale components. Consider a large brass bushing with an inner diameter of 200mm and a length of 1000mm. If the operating temperature rises from 20°C to 120°C (ΔT=100∘C), the dimensions change as follows:

  • Diameter Increase: Approximately 0.35mm

  • Length Elongation: Approximately 1.84mm

Such significant dimensional changes can cause the fit clearance between the shaft and the bushing to vanish completely. This often leads to “seizing” or “locking up,” resulting in equipment downtime or even catastrophic damage.

2. Strategies to Prevent Seizing in High-Temperature Environments

To ensure reliability and prevent seizing, the following dimensional adjustment strategies are essential:

  • Pre-calculate Thermal Expansion Clearance:
    During the design phase, calculate the temperature difference between the operating environment and room temperature. Using the formula 

    ΔL=α×L×ΔT (where α is the CTE, L is the original dimension, and ΔT

    is the temperature difference), estimate the expected expansion and compensate for this value within the fit clearance.

  • Adopt Thermal Compensation Structures:
    For exceptionally long bushings, consider using a segmented design or incorporating thermal expansion grooves in the center. These features allow the bushing to expand radially and axially in an orderly and controlled manner.

  • Optimize Installation Methods:
    Avoid using interference fits, particularly at the high-temperature end of the assembly. Ensure that the shaft system retains the freedom to expand, thereby preventing the concentration of thermal stress.

3. Material Variations and Engineering Best Practices

It is important to note that different brass alloys exhibit varying thermal expansion characteristics. For instance, ordinary brass (e.g., H62) has a CTE of approximately 18.4×10⁻⁶/°C, whereas high-strength brass (e.g., H85) may differ slightly. For high-precision applications, designers should refer to the specific empirical data of the chosen material.

Engineering Practice Recommendation:
For applications where operating temperatures exceed 100°C or bushing dimensions are larger than 200mm, detailed thermal expansion calculations are mandatory. Furthermore, designs should be validated using Finite Element Analysis (FEA) to ensure structural rationality and safety.

Principles of Matching Load and Wall Thickness in Brass Bushings

The selection of wall thickness is a critical determinant of a brass bushing’s load-bearing capacity and service life. It is essential to precisely match the wall thickness to the application load; a wall that is too thin risks premature failure, while one that is too thick results in material waste and increased costs.

1. Load Capacity as the Primary Basis

The load capacity of a brass bushing is closely related to its inner diameter, wall thickness, and length. Generally, a greater wall thickness provides stronger load-bearing capability, but this relationship is not linearly incremental. If the wall thickness increases beyond a certain point, the resulting increase in rigidity can lead to uneven stress distribution, which may paradoxically reduce the bushing’s fatigue life.

2. Factors Influencing Wall Thickness Selection

When selecting the wall thickness for brass bushings, the following factors must be comprehensively considered:

  • Load Type and Magnitude: Static loads allow for relatively thinner walls. However, applications involving shock loads or alternating loads require a thickness increase of 20%–30%. For heavy-duty applications (such as mining machinery), the wall thickness may need to reach 25%–30% of the inner diameter.

  • Length-to-Diameter (L/D) Ratio: Brass bushings with an L/D ratio greater than 1.5 require increased wall thickness to prevent deformation caused by edge loading or misalignment.

  • Operating Environment: Factors such as lubrication conditions, operating temperature, and the presence of corrosive media must be factored into the design.

3. Engineering Guidelines based on Load Pressure

Practical engineering experience suggests the following standards for brass bushing design:

  • Medium-Low Load Applications (<30 MPa): Standard series bushings are suitable, with a wall thickness typically set at 10%–15% of the inner diameter.

  • Heavy Load Applications (50–80 MPa): Wall thickness should be increased to 20%–25% of the inner diameter.

  • Super-Heavy Load Applications (>80 MPa): These conditions require custom thick-walled bushings. In such cases, adopting centrifugal casting processes is often necessary to ensure material density and structural integrity.

4. Critical Requirements for Large-Scale Bushings

For large brass bushings (with an inner diameter exceeding 300mm), uniformity of the wall is just as important as the absolute thickness. The variation in wall thickness must be controlled to within 0.5mm. This precision is vital to prevent stress concentration and avoid premature fatigue failure.

Comparative Dimensional Stability of Different Alloys in Brass Bushing Design

The dimensional stability of a brass bushing is not solely determined by design parameters; it is intrinsically linked to the material properties of the alloy used. Different copper alloys exhibit significantly different stability characteristics under identical operating conditions, a factor that becomes critical in large-scale applications.

1. C93200 (SAE 660 Tin Bronze): The Standard for High Performance

C93200, often categorized alongside high-grade brass bushing materials in general catalogs, is a high-performance tin bronze renowned for its excellent wear and corrosion resistance. With a high tin content (approximately 8%–10%) and a small amount of lead to improve machinability, it is an ideal choice for bearing applications.
Key performance characteristics in large-scale applications include:

  • Superior Wear Resistance: Suitable for medium to high load conditions (up to 80 MPa), achieving a low friction coefficient of 0.08–0.12.

  • Excellent Dimensional Stability: After heat treatment, the rate of dimensional change in the inner diameter can be controlled to within 0.02%.

  • Corrosion Resistance: It performs well in seawater and acidic/alkaline environments, with an annual corrosion rate of less than 0.1mm.

2. C95400 (Aluminum Bronze): Superior Strength for Extreme Conditions

In contrast, C95400 Aluminum Bronze is distinguished by its superior mechanical properties. With an aluminum content of 10%–11% and the addition of iron, this alloy is specifically engineered for high-speed, high-temperature, and heavy-load scenarios where a standard brass bushing might fail.
Advantages in large-size applications include:

  • Enhanced Strength and Hardness: Its wear resistance is 1.5 to 2 times that of ordinary tin bronze, making it suitable for extreme heavy-duty loads.

  • Outstanding High-Temperature Performance: It maintains stable mechanical properties at temperatures up to 400°C. Its dimensional change rate at high temperatures is 15%–20% lower than that of C93200.

  • Cavitation Resistance: It offers excellent resistance to cavitation, making it ideal for hydropower generation and marine propulsion systems.

3. Selection Strategy and Cost-Benefit Analysis

In practical selection, C93200 is generally more suitable for small to medium-sized brass bushing applications under general industrial conditions. Conversely, C95400 is the preferred choice for large, heavy-duty bushings operating in high-temperature or corrosive environments.
From a cost perspective, while C93200 costs approximately 70 RMB/kg, C95400 is typically 20%–30% higher in price. However, this initial cost premium is often offset by the significantly extended service life and reduced maintenance downtime.

4. Manufacturing Considerations for Super-Large Bushings

For super-large brass bushings (with an inner diameter exceeding 500mm), manufacturing processes are as critical as material selection. Utilizing centrifugal casting for C95400 bushings often yields superior overall performance compared to sand casting. This process ensures a denser material structure with a wear-resistant hardness reaching up to 280 HB, ensuring maximum longevity.

Graphite Impregnated Brass Bushings: An Innovative Solution for Enhanced Mechanical Performance

In the realm of mechanical engineering, the smallest components often bear the heaviest responsibilities. The selection of materials for these components can determine the success or failure of an entire system. Among the myriad of options available, Graphite Impregnated Brass Bushings stand out as a superior tribological solution, renowned for their exceptional durability, low maintenance requirements, and high performance. By uniquely combining the structural strength of brass with the self-lubricating properties of graphite, these bushings offer a reliable solution for a diverse range of industrial applications.

1. The Engineering Value of Solid Lubricants in Bearing Technology

Friction and wear are the primary causes of failure in mechanical systems. While traditional liquid lubricants reduce friction, they have limitations: they require regular maintenance, pose environmental contamination risks, and can fail under extreme conditions. Graphite Impregnated Brass Bushings address these issues through the science of solid lubrication.

Graphite is an ideal solid lubricant due to its chemical structure; its carbon atoms are arranged in parallel platelets that shear easily, providing unique lubricity. When impregnated into a brass matrix, the graphite is gradually released during operation to form a solid lubricating film on the friction surface.

  • Self-Lubrication: This transfer film effectively lowers the coefficient of friction and protects mating surfaces.

  • Reliability: Unlike oil-based systems, this self-lubricating property remains effective even under high temperatures, heavy loads, or in locations where maintenance access is impossible.

2. Core Advantages of Graphite Impregnated Brass Bushings

The superiority of Graphite Impregnated Brass Bushings is defined by three key dimensions: maintenance efficiency, load capacity, and environmental adaptability.

  • Minimized Maintenance Requirements: Acting as a permanent solid lubricant, the embedded graphite eliminates the need for continuous external greasing. This significantly reduces machine downtime and boosts operational efficiency, particularly in “fit-and-forget” applications.

  • Exceptional Load-Bearing Capacity: These bushings are engineered to withstand immense stress without compromising performance. Whether in heavy construction machinery or automotive systems, they maintain smooth motion under high contact pressures.

  • Superior Thermal Stability: Graphite Impregnated Brass Bushings excel in high-temperature environments (such as pumps and motors). The brass matrix aids in heat dissipation, while the graphite remains stable, ensuring performance despite extreme thermal fluctuations.

  • Corrosion Resistance and Durability: The brass base provides excellent resistance to oxidation and corrosion, making these bushings highly durable even when exposed to moisture, salt spray, or chemical contaminants.

3. Material Analysis: Selecting the Right Base Alloy

The performance of Graphite Impregnated Brass Bushings is heavily dependent on the specific brass alloy selected as the substrate.
High-strength brass alloys, typically following the CuZn25Al6Fe3Mn3 system, offer a high tensile strength and wear resistance.

Comparison of Common Base Materials:

Material Code International Standard Hardness (HB) Tensile Strength (N/mm²) Recommended Application Conditions
650# C86300 (Manganese Bronze) >210 >750 High Load, Low Speed
650#S1 C86300 Enhanced >250 >800 Ultra-High Load, Low Speed
650#S2 C95500 (Aluminum Bronze) >150 >800 Medium Load, Medium Speed
650#S3 C83600 (Tin Bronze) >70 >200 Medium Load, Low Speed

  • Selection Strategy: For extreme heavy-duty lifting, C86300 based bushings are preferred. For environments requiring higher speeds or specific corrosion resistance, C95500 aluminum bronze is the optimal choice.

4. Critical Application Scenarios in Modern Industry

The versatility of Graphite Impregnated Brass Bushings makes them indispensable across various sectors:

  • Marine Engineering: Used in propeller shaft bearings and rudder bearings, they withstand corrosive seawater and high loads while ensuring continuous operation without water-polluting greases.

  • Heavy Industry & Mining: In excavators and crushing equipment, these bushings serve as robust pivot points. Their ability to handle shock loads and abrasive dust makes them ideal for severe environments.

  • Automotive & Transportation: Employed in suspension systems and steering mechanisms, they enhance vehicle safety and longevity by reducing friction-related wear.

  • General Industrial Machinery: From injection molding machines to high-temperature compressors, the heat resistance and load capacity of Graphite Impregnated Brass Bushings directly contribute to the overall efficiency and reliability of production lines.

Versatile Brass Bushings for All Projects