China Oil Impregnated Bronze Bushings
BLUE oil impregnated bronze bushings feature an oil content ranging from 9% to 27%, tight tolerances, low operating noise, and long service life. We offer sintered bronze bushings available in sleeve, flanged, and spherical shapes.
Why Choose BLUE?
BLUE is your trusted sintered bushing manufacturer, offering high-quality oil-impregnated bronze bushings with strict tolerances, along with free samples, fast delivery, and competitive pricing from China.
BLUE High Quality Standards
BLUE assures your product quality with ISO 9001:2015 certified quality management system. We provide a one-year warranty on your oil impregnated bronze bushings.
Standard Sintered Bronze Bushing Shop
BLUE has a wide range of standard sintered bushings in stock for quick delivery. All of these oil impregnated bronze bushings come with no mold fees.
Download Sintered Bronze Bearings Product List
Discover BLUE’s full range of standard oil impregnated bronze bearing. Download our free product list to find the exact match for your requirements.
BLUE Oil Impregnated Bronze Bushings
BLUE provides a broad array of standard oil-impregnated bronze bushings, readily available in stock. If you can’t find the specific bushing you need, feel free to contact us for custom solutions.
Sintered Bronze Bearing
Sintered bronze bearing is made of CuSn10, with an oil content of 9%-27%, and is widely used in household appliances.
Impregnated Bronze Bushing
Our oil impregnated bronze bushings are made of bronze powder, with precise dimensional accuracy and positional accuracy.
Sintered Bronze Bushing
BLUE's sintered bronze bushings are available in a wide range to suit both high and low speed applications.
Sintered Bronze Flanged Bushings
Sintered bronze flanged bushings are self-lubricating, durable components with flange shape for easy installation.
Sintered Bronze Sleeve Bearing
Our sintered bronze sleeve bearings have strict dimensional tolerances and a prolonged lifespan.
Sintered Brass Bushing
BLUE sintered brass bushings offer excellent corrosion resistance and self-lubricating properties.
BLUE's Sintered Bronze Bushing Advantages
BLUE is ISO 9001:2015 certified and the sintered bronze bearings produced are subject to strict quality control.
Our self-lubricating bronze bearings feature controllable porosity, high oil content, and excellent lubrication performance.
BLUE sintered bronze bearings have a service life of up to 50,000 hours.
We can not only manufacture sintered bronze bearings, but also sintered iron bearings and sintered iron-bronze bearings.
Tight Tolerances
As we all know, oil impregnated bronze bushings must have tight radial tolerance.
The clearance between the inner diameter and the shaft needs to be quite accurate, and the outer diameter needs to fit accurately into the bearing housing.
BLUE sintered bronze bushings can reach tolerance within ±0.01mm after sizing process.
Sizing also has the benefit of surface sealing of the oil-impregnated bronze bushings.
Standard Sintered Bronze Bushing
BLUE offer a multitude of oil impregnated bronze bushings, including sintered iron bushings, sintered bronze bushings, and sintered iron & copper bushings.
All of these standard oil impregnated bronze bushings are in stock and available for direct purchase.
Our sintered bronze sleeve bushings come in a range of sizes, with inner diameters from 3mm to 60mm, outer diameters from 5mm to 70mm, and lengths from 3mm to 65mm.
Free download our full list of sintered bushings by clicking below!
How are Sintered Bushings lubricated?
Oil impregnated bronze bushings release lubricating oil from their pores during operation, driven by the suction effect of shaft rotation and increased friction temperature, forming an oil film that reduces friction.
When the machine stops, capillary forces draw the lubricating oil back into the pores of the sintered bushing.
However, during low-speed operation, insufficient hydraulic pressure can cause direct contact between the bearing and the shaft. This results in increased friction, wear, and a rise in temperature, potentially leading to lubricating oil loss.
Benefits of Oil Impregnted Bronze Bushings
- Reduced Noise
Compared to conventional bearing, oil-impregnated bronze bushing releases lubricating oil during operation, reducing friction and ensuring quieter performance.
- Excellent Corrosion Resistance
Sintered bronze bushing offers excellent corrosion resistance due to the natural properties of bronze and the protective effect of the lubricating oil, which helps prevent rust.
- Long Service Life
Oil-impregnated bronze bearings are protected by lubricating oil during operation, resulting in low friction, minimal wear, extended service life, and reduced maintenance costs.
Applications of Oil Impregnated Bushings
Sintered bronze bushings offer excellent self-lubrication, corrosion resistance, long service life, and low noise, making them ideal for use across various fields:
Household Appliances: electric fans, air conditioners, juicers, coffee machines
Automobiles: engines, transmissions, steering gears, brake systems
Power Tools: electric scissors, electric saws, electric drills
Industrial Equipment: agricultural machinery, textile machinery, conveyors, forestry machinery
Sintered Bronze Bushings: Composition & Properties
Below are some of the chemical compositions and physical properties of sintered bronze bearings specified by MPIF Standard 35, which we can all produce.
| Attribute | CT-1000-K19 | CT-1000-K40 | CTG-1001-K17 | CT-1004-K10 |
|---|---|---|---|---|
| Min. Crushing Strength | 130MPa | 280MPa | 120MPa | 70MPa |
| Min. Oil Content | 24% | 9% | 22% | 11% |
| Density (Oil Impregnated) | 6.0-6.4 g/cm3 | 7.2-7.6 g/cm3 | 6.0-6.4 g/cm3 | 5.8-6.2 g/cm3 |
| Cu | 87.2-90.5% | 87.2-90.5% | 85.7-90.0% | 82.8-88.3% |
| Sn | 9.5-10.5% | 9.5-10.5% | 9.5-10.5% | 9.2-10.2% |
| Graphite | 0-0.3% | 0-0.3% | 0.5-1.8% | 2.5-5.0% |
| Other | 0-2.0% | 0-2.0% | 0-2.0% | 0-2.0% |
Recommended Values of Load Pressure (P) and Speed (V) for Sintered Bushings
The following are the specifications of density and oil content of bronze sintered bushings and iron & copper sintered bushings. If you have any questions, feel free to ask our engineering team.
| Spindle Speed V / (m/min) | P/MPa (FC-1000) | P/MPa (CT-1000) |
|---|---|---|
| Static | 105 | 60 |
| Slow and Intermittent Softness | 35 | 28 |
| 7 | 18 | 14 |
| 15-30 | 4.8 | 3.5 |
| 30-45 | 2.8 | 2.5 |
| 45-60 | 2.1 | 1.9 |
| 60-150 | / | P= 105/V |
| >60 | P= 105/V | / |
| 150-300 | / | P= 127/V |
BLUE's Powder Metallurgy Products Manufacturing Equipment
As a leading sintered bushings manufacturer, BLUE is equipped with precision powder metal tooling, powder compaction presses, sintering furnaces, CNC machining equipment and advanced testing equipment.
- Compacting
- Sintering
- Inspecting
- Machining
- Packaging
Oil Impregnated Bronze Bushings Manufacturing Process
Powder metallurgy is a precision manufacturing process with a continuing and stable accuracy of up to 0.01mm, which requires strict control at each stage to ensure the quality of the final part. Any deviation or error during the process may result in the rejection of the entire batch.
Designing
Mold design is a critical process that must consider the desired part geometry, material properties, production volume, and cost-effectiveness.
Tooling
Powder metallurgy tooling includes upper and lower punches, die, and core rod. The mold needs to have excellent strength, hardness and wear resistance.
Mixing
Mixing is the process of blending metal powder with binders to improve its uniformity and fluidity, promoting better material consistency.
Compacting
Conpacting is a process that presses metal powder into mold cavity through powder compaction machine to get a green compact part.
Sintering
Sintering heats the green compact to a temperature below its melting point in a controlled atmosphere to obtain the desired mechanical properties.
Sizing
Sizing corrects dimensional deviations after sintering and enhances product accuracy. It requires an additional, simpler set of molds compared to the forming mold.
Tumbling
Tumbling removes burrs and flash from a part's surface by vibrating it with abrasive media, such as stone or ceramic, resulting in a smoother finish.
Machining
Machining can achieve complex shapes that cannot be pressed by powder metallurgy, such as transverse holes and screw threads.
Blackening
Blackening process, or steam treatment, forms an oxide layer to prevent rust and increase hardness, offering a cost-effective solution.
Hardening
Hardening enhances the material's strength and hardness through carburizing or nitriding, resulting in improved wear resistance and fatigue life.
Inspecting
The inspecting process is always a critical step that ensures quality and performance through BLUE inspection standards before shipping.
Packaging
BLUE's packaging process uses anti-rust paper, vacuum, blister and other methods to ensure that the product is intact during transportation.
BLUE's Manufacturing Capabilities
BLUE not only manufactures precision sintered bushings, but also provides customized powder metallurgy parts, MIM parts, sintered filters and sintered ceramics, all of which are subject to strict quality control.
PM Tooling
BLUE has over 20 years of experience in powder metallurgy tooling design and production, with a service life of up to 500,000 cycles.
MIM Parts
BLUE's MIM parts feature flexible designs and top strength, produced with consistent quality for complex requirements.
Sintered Filters
BLUE's sintered filters are designed to resist corrosion, so it can perform reliably and durable even in harsh chemical environments.
Sintered Ceramics
BLUE's sintered ceramics offer excellent resistance to high temperatures and corrosion, along with good strength, hardness, and surface finish.
FAQ's
Here are some of the questions we get asked often. If yours isn’t answered, don’t hesitate to contact us, we’re happy to help!
First, copper powder, tin powder, graphite powder and other powders are mixed evenly. The mixed powder is formed under a pressure of about 300MPa. Finally, green compact is sintered at 750°C to 850°C to form porous parts.
Sometimes, we also use pre-alloyed powder, and the sintered products have better mechanical strength and uniform pore size.
After sintering, the oil-impregnated bearing is finally formed after vacuum oil impregnatio and sizing.
As we know, sintered bronze bushings contain numerous internal pores, which makes them suitable for oil impregnation.
Typically, the sintered bushings are placed in a mesh basket and submerged in an oil tank. A vacuum is then applied to remove air from the pores, allowing the oil to fill them.
Afterward, air is reintroduced to create atmospheric pressure, further pushing the oil into the bushing’s pores.
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