Myway: Professional Sintered Bush Manufacturer in China
Custom Powder Metallurgy Bushings for Your Industrial Applications
With 20 years of experience in the design and production of precision sintered metal bushings, Myway specializes in providing professional self-lubricating, corrosion-resistant solutions for your automotive, marine and other industrial applications.
- ISO9001 and IATF16949 certified
- Advanced metal powder metallurgy technology
- Excellent corrosion resistance with quality materials
- 40% high porosity, can be impregnated with lubricating oil
- Effectively reduce the noise generated by machine operation
Introduction of Sintered Metal Bushings
Sintered metal bushings are manufactured by powder metallurgy process. Copper alloy, iron based alloy or stainless steel powders are sintered at high pressure and high temperature to form uniform pore structure, then immersed in lubricating oil in vacuum environment to give the bushing self-lubricating performance and reduce downtime.
After vacuum sintering process and high pressure compaction technology, the porosity of sintered metal bushings ranges from 10% to 40%, which can achieve stable oil storage effect, ensure maintenance-free operation and long service life.
Made of all-metal material, the sintered metal bushings are characterized by rigidity, high temperature resistance and high strength. It therefore performs well against wear, corrosion and extreme conditions, making it ideal for use in automotive engines, industrial pumps, marine equipment and food processing machinery.
Types of Sintered Metal Bushings by Materials
Sintered Bronze Bushings
The main materials of sintered bronze bushings are CuSn10, SAE841, SINT A51, etc., which belong to tin bronze or lead bronze, and they have high strength and anti-seize performance.
Sintered Iron Bushings
Myway sintered iron bushings are made by sintering cast iron particles under high temperature and pressure, and then immersed in 18%-20% mineral oil in vacuum environment.
Oil Impregnated Bushings
The porosity of the oil immersed bushing made by powder metallurgy can be as high as 40%. Its gaps are impregnated with lubricating oil, providing long-term maintenance-free lubrication.
Sintered Steel Bushings
The most commonly used materials including stainless steel 304 and 316, which make it specifically suitable for chemical, marine, food processing and other high-corrosion applications.
Main Shapes of Sintered Metal Bushings
Spherical Bronze Bushing
Spherical bronze bushings have spherical structure that distributes the load evenly, making them ideal for mechanical scenarios that require self-aligning, high load carrying and wear resistance.
Sintered Bronze Sleeve Bearing
The sintered bronze sleeve bearing has an internally connected structure and its inner and outer surfaces are smooth. Its oil content after oil immersion can reach 15% to 30%.
Sintered Bronze Flanged Bushings
Sintered bronze flanged bushings are really sleeve bearings with additional rounded flange of 3-10mm thickness, which can be axially positioned by bolts or press fit to avoid shifting.
Custom Powder Metallurgy Bushings
In addition to standard parts, Myway can also design and fabricate various special-shaped parts of powder metallurgy bushings to meet your various application requirements.
Features of Sintered Metal Bushings
High-Strength Materials
Using copper alloys (CuSn10, SAE841, SINT A51); stainless steel304/316; iron-based alloys, etc. as raw materials, it has high mechanical strength to be used in high load mechanical systems.
Precision Technology
Through high-temperature sintering and vacuum oil impregnation, it maintains self-lubricating while requiring infrequent maintenance, making it suitable for close-fitting applications.
Excellent Adaptability
It is resistant to corrosive chemicals like acids, alkalis, etc. and can resist corrosion from seawater. In addition, stainless steel bushing meets FDA standards and can be used in food industry.
Brilliant Design
Bushings are designed to perform well: spherical bushings for even load distribution on heavy machinery and flanged bushings to prevent axial movement in high vibration environments.
Good Lubrication Effect
After vacuum oil impregnation, the oil content of bushing can reach 18%-28%, which can provide long-term maintenance-free and stable lubrication effect under medium and low load scenarios.
Customizable Shapes
In addition to sleeve, flanged, and spherical shapes, we offer shaped powder metallurgy bushings to meet the needs of industries that require bushings with complex geometric structures.
Materials of Sintered Metal Bushings
- Copper-based Alloy: The copper-based alloys used to make sintered metal bushings are mainly tin bronze and lead bronze. The tin content of tin bronze is 5-10%, which has high wear resistance. Lead bronze is a copper-tin alloy with 5%-15% lead added to it, which can withstand impact loads.
- Iron-based Alloy: Iron-based alloys are made of pure iron or low-carbon steel powder, which are alloyed by adding copper, graphite, etc. to balance strength and self-lubricity. Its cost is 30-50% lower than that of bronze, and it is an economical medium-load solution.
- Stainless Steel: Stainless steel 304 or 316 has a high corrosion resistance and meets FDA standards. It is suitable for food and beverage filling equipment, medical machinery, marine machinery and other fields.
Production Process of Sintered Metal Bushings
- According to the multi-component powder dynamic proportioning system, accurate ingredients are made for different materials.
- Use special automatic forming press for powder metallurgy to press the metal powder under high pressure.
- Heat the basically formed bushing to temperature close to the melting point. The copper-based material is 700-800℃, the iron-based is 1050-1120℃, and the sintering time is 3-5 hours.
- Use a special shaping press for powder metallurgy to correct deformation and improve product accuracy.
- Put the product and oil in a container, then evacuate it to a vacuum state to allow the oil to automatically penetrate into the product.
- Put the finished bushing into the spin dryer and spin it slowly 3 times, each time for 10-20 minutes.
Testing of Sintered Metal Bushings
- Oil Content Detection: The oil content is calculated according to the mass difference before and after oil immersion, so as to ensure that the oil content of copper base bushings is 18-25%, and that of iron base bushings is 20-30%.
- Nondestructive Testing: Ultrasonic flaw detector is used to detect internal defects.
- Hardness Testing: Use Rockwell hardness meter, Brinell hardness meter and microhardness meter to test the hardness of quenched steel back layer, copper alloy layer and interface bonding area.
Pressure Resistance Testing: According to GB/T 6804-2008 or ISO 4379 standard, the radial compressive load is applied to the bushing by hydraulic testing machine to observe whether the bushing will crack, break or permanent deformation.
Applications of Sintered Metal Bushings
Automotive Manufacturing
Bushings are indispensable for engine system, chassis, transmission system, etc. of automobiles. They can provide stability and support for engine components, suspension systems and other key parts under high temperature and high speed.
Industrial Machinery
From electric motors to printing equipment, agricultural heavy machinery and environmental protection equipment, sintered metal bushings can withstand heavy loads, reduce friction, and reduce vibration, thereby improving equipment performance and efficiency.
Aerospace
Nickel-based bushings can withstand high temperatures of 900℃, meeting the high reliability requirements of aircraft engines. In addition, the corrosion resistance of sintered stainless steel sets enables it to maintain stable performance in humid environments.
Food Processing
Myway 304/316 stainless steel bushings meet strict FDA and USDA standards, ensuring that they will not cause any pollution in food and beverage manufacturing environments, effectively reducing noise and extending maintenance cycles.
Factory Gallery
FAQs
1. How do Oil Impregnated Bushings Work?
Our sintered metal bushings have uniform pore structure with porosity of up to 40%, which effectively locks in lubricating oil. When the bushing is in operation, the heat and movement release oil to the surface, achieving lifelong self-lubrication without external maintenance.
2. Can I Get a Custom-shaped Bushing?
Of course! Myway has been focusing on providing custom powder metallurgy bushings for non-standard applications for 20 years. Just contact us with your design requirements and we will respond quickly and provide you with a tailor-made solution.
3. What is The Design Process for Custom Sintered Metal Bushings?
- Requirement Analysis:determine whether the load type is radial or axial, ambient temperature, medium and other parameters;
- Material Selection:recommend bronze (heavy load), iron-based (economical) or stainless steel (corrosion resistant) according to your needs;
- Simulation Verification:simulate stress distribution through finite element analysis (FEA) to optimize porosity and structure;
- Prototype Test:we can provide 5-50 samples, and the test cycle is 2-4 weeks;
- Mass Production:our minimum order quantity is 200 pieces, and the automated production line supports fast delivery.
Note: complex special-shaped parts (such as asymmetric spherical surfaces) require additional 3D printing molds, and the delivery time will be extended by 1-2 weeks.
4. Do Sintered Metal Bushings Require Regular Maintenance?
The self-lubricating design of sintered metal bushings can achieve long-term maintenance-free, but the maintenance cycle needs to be adjusted according to the working conditions.
5. What Factors Affect the Service Life of Sintered Metal Bushings?
- Overload Risk:Exceeding the rated load will cause pore collapse and shorten the service life by more than 50%;
- Lubrication Failure:Long-term high temperature (> 250℃) will cause carbonization of the lubricating oil, and high-temperature grease needs to be selected;
- Pollution Intrusion:When used in a dusty environment, you need to seal it to prevent wear.
Regular cleaning and selection of surface coatings can extend the service life by 2-3 times.
Zhejiang Myway Co., Ltd. was established in 2005 and has grown into a leading company in the bushing industry. It has more than 20 years of experience in high-quality bushing research, development and production.
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Greenland Central Plaza, Gongshu District, Hangzhou City, Zhejiang Province, China