Graphite Plugged Bushings – Graphite Plugged Bronze Bushings Supplier
At Bronzeoilless.com, we specialize in manufacturing high-quality graphite plugged bronze bushings designed to deliver unmatched durability and self-lubricating performance in demanding applications. As a trusted factory and supplier, we pride ourselves on engineering solutions that reduce maintenance costs, extend equipment lifespan, and enhance operational efficiency.
What Is Graphite Plugged Bushing?
Graphite plugged bushing is in the metal substrate by a certain arrangement of pre-processed holes or grooves, the graphite embedded in it, in the process of friction the metal substrate bears the majority of the load; due to friction heat or the role of the ambient temperature, graphite material in the sliding surface slightly convex, in the metal substrate and the counterpart surface to form a well-lubricated, firmly attached and uniformly covered solid transfer film. Significantly reduce the friction wear; with the entry of friction, the embedded solid lubricating material is constantly provided on the friction surface to ensure long-term operation of the friction vice good lubrication. The unique design ensures consistent lubrication, even in extreme conditions where traditional grease or oil lubricants may fail due to high temperatures, heavy loads, or contamination.
Currently, the commonly used substrate materials are ZQSn6-6-3, HT250, Cr15, and CuZn25Al6Mn4, etc., which can meet the performance requirements under different working conditions. Metal matrix available solid material casting molding or powder metallurgy formation method.
Solid lubrication material embedding solid embedding, direct injection, casting method, etc. Can be selected according to the different working environments.
Application Of Graphite Plugged Bushing Bearings
Graphite plugged bronze bushings are especially suitable for oil-free, high temperature, high load, low speed, anti-fouling, anti-corrosion, anti-radiation, as well as in water or vacuum solution wetting and simply can not add lubricating oil film under special working conditions.
graphite bronze bushing is widely used in metallurgical rolling equipment, filling equipment, water turbines, gas turbines, instruments and mining machinery, marine machinery, textile machinery, shipbuilding industry, etc. At the same time, Graphite plugged bushings are also more and more widely used in other industrial and agricultural machinery.
GCr15 Graphite Bearing
GCr15 is a commonly used high carbon chromium bearing steel, renowned for its exceptional hardness, wear resistance, and contact fatigue strength.
Steel oilless bearing, a reinforced product, has high compressive performance.
Steel & Copper Inlaid Bearing
Steel and copper inlaid bearings are a type of bearing that combines the strength and durability of steel with the excellent bearing properties of copper. This combination results in a bearing that is highly resistant to wear and capable of withstanding high loads, making it suitable for a variety of applications.
Why Use Graphite As A Solid Lubricant？
Graphite is a crystalline form of carbon, with hexagonal lattice, the atoms are arranged in layers, the distance between carbon atoms in the same layer is 0.142nm, which are covalently bonded to each other; the distance between layers is 0.34nm, which are molecularly bonded to each other. The layer-to-layer force is very small, so it is easy for relative sliding to occur between the layers. Because of these structural characteristics, its strength and hardness are very low, and its plasticity is also very poor, but it can play a good role in reducing wear, and is a good solid lubricant.
Graphite Plugged Bronze Bushings are often used as a lubricant in the machinery industry. Lubricating oil often can not be used in high speed, high temperature, high pressure conditions, while graphite wear-resistant materials can be in a 200 ℃ a 2000 ℃ temperature and at a very high sliding speed (loom / S) without lubricant work.
The Material Of Graphite Plugged Bushings
There are different types of bronze materials used in the manufacture of graphite plugged bushings, including :
- SAE 841 Bronze: SAE 841 is a powdered metal bronze material that is often used to make self-lubricating bearings and bushings. It is a porous material that is impregnated with oil, which provides excellent lubrication and reduces friction.
- C86300 Manganese Bronze: C86300 is a high-strength manganese bronze material that is often used in heavy-duty applications where high load capacity and wear resistance are required.
- C93200 Bronze: C93200 is a high-strength bearing bronze material that is often used in applications where high wear resistance is required. It has excellent machining properties and can be easily machined into complex shapes.
- C95400 Aluminum Bronze: C95400 is a high-strength aluminum bronze material that is often used in applications where high strength and corrosion resistance are required. It is commonly used in marine applications due to its excellent resistance to saltwater corrosion.
The choice of bronze material depends on the specific application requirements such as load capacity, speed, temperature, and environment. It is important to select the appropriate bronze material to ensure optimal performance and long service life.
Plug Graphite Continuous Cast Bronze
The core of our graphite plugged bronze bushings lies in the continuous cast bronze substrate. Unlike sintered or powdered metal alternatives, our cast bronze rods are engineered for:
- Enhanced Structural Integrity: The continuous casting process eliminates porosity, creating a dense, homogeneous material with superior mechanical strength.
- Higher Load Capacity: Cast bronze withstands extreme static and dynamic loads (up to 6,000 PSI), making it ideal for heavy machinery and industrial equipment.
- Thermal Stability: Retains dimensional stability and strength even at temperatures exceeding 300°C (572°F).
- Corrosion Resistance: Bronze alloys like C93200 (SAE 660) and C95400 (Aluminum Bronze) offer excellent resistance to water, chemicals, and wear.
Enhance Your Applications with Customizable Features: Flanges, Grooves, Threaded Holes & Coatings
At Bronzeoilless.com, we understand that every industrial application has unique demands. That’s why our graphite plugged bronze bushings are not just standard components – they are fully customizable solutions engineered to fit your exact needs. Beyond our core self-lubricating design, we offer specialized features like flanges, grooves, threaded holes, and advanced coatings (e.g., PTFE, nickel) to optimize performance, simplify installation, and extend service life.
High-quality oilless bronze bushing offering efficient, maintenance-free operation for industrial machinery.
Tailored for Precision: Key Customizable Features
1. Flanges: Stability Meets Ease of Installation
- Design Flexibility: Choose from integral flanges (machined as part of the bushing) or press-fit flanges for added versatility.
- Benefits:
- Axial Load Support: Prevents lateral movement in high-vibration systems like pumps, gearboxes, or rotating shafts.
- Simplified Assembly: Flanges act as alignment guides, reducing installation time and human error.
- Material Options: Flanges can be matched to the base bronze alloy (C93200/C95400) or coated for corrosion resistance.
- Applications: Automotive transmissions, conveyor belt rollers, marine propeller shafts.
2. Grooves: Optimized Lubrication & Retention
- Engineered Channels: Precision-machined grooves on the inner or outer diameter enhance lubrication distribution and debris expulsion.
- Benefits:
- Extended Lubrication Life: Grooves retain graphite particles, ensuring consistent lubrication under heavy loads.
- Contaminant Removal: Spiral or axial grooves expel dirt and wear particles, reducing abrasive damage.
- Custom Patterns: Radial, helical, or crosshatched grooves tailored to motion type (rotational, oscillating).
- Applications: Hydraulic cylinder rods, agricultural pivot joints, construction boom arms.
3. Threaded Holes: Secure Fastening & Alignment
- Precision Tapping: Threaded holes (metric or inch standards) are added to bushings for bolts, set screws, or sensors.
- Benefits:
- Modular Assembly: Securely attach bushings to housings or shafts without additional fixtures.
- Sensor Integration: Threaded ports allow mounting of temperature or wear sensors for predictive maintenance.
- Load Distribution: Multiple threaded holes enable even load sharing in high-stress applications.
- Applications: Wind turbine pitch bearings, robotic arms, industrial press fittings.
4. Advanced Coatings: Extreme Environment Protection
We apply high-performance coatings to our bronze bushings to address specific operational challenges:
- PTFE (Polytetrafluoroethylene) Coating:
- Ultra-Low Friction: Reduces dynamic friction coefficient to 0.05–0.1, ideal for precision machinery.
- Chemical Resistance: Withstands acids, solvents, and fuels.
- Non-Stick Properties: Prevents material buildup in food processing or pharmaceutical equipment.
- Nickel Plating:
- Corrosion Resistance: Protects against saltwater, acids, and alkalis in marine or chemical industries.
- Surface Hardness: Increases wear resistance by up to 30% compared to uncoated bronze.
- Custom Coatings: Options include molybdenum disulfide (MoS2) for high-pressure applications or DLC (Diamond-Like Carbon) for extreme wear resistance.
Why Customization Matters
- Solve Unique Challenges: Adapt bushings to harsh temperatures, corrosive fluids, or complex motion profiles.
- Reduce Total Cost of Ownership: Minimize downtime and part replacements with purpose-engineered designs.
- Streamlined Integration: Eliminate the need for secondary machining or retrofitting.
Industries We Serve
Our customized graphite plugged bronze bushings are trusted in:
- Oil & Gas: Coated bushings for offshore drilling rigs exposed to seawater and hydrocarbons.
- Food & Beverage: PTFE-coated bushings meeting FDA standards for hygiene and chemical resistance.
- Renewable Energy: Flanged bushings with threaded sensor ports for wind turbine pitch control systems.
Our Customization Process
- Consultation: Share your application requirements (load, speed, environment) with our engineers via una@viiplus.com.
- Design & Prototyping: We provide 3D models and material recommendations, with fast-turn prototypes for testing.
- Production: Precision machining, coating, and quality checks (dimensional accuracy, coating adhesion).
- Delivery: Global shipping with full documentation, including coating certifications and installation guides.
Unlock the Full Potential of Your Machinery
Whether you need flanged bushings for heavy-duty alignment, PTFE-coated sleeves for chemical resistance, or threaded holes for smart maintenance – Bronzeoilless.com delivers.
Contact us today at una@viiplus.com to discuss your project or request a quote.
Visit Bronzeoilless.com to explore how customization can elevate your equipment’s performance!
Metallurgical machinery and equipment in harsh working conditions Graphite Plugged bronze bushing, need to have:
(1) excellent wear resistance to adapt to metallurgical machinery and equipment periodic overhaul bearing service capacity;
(2) high strength to adapt to the heavy load and impact resistance of metallurgical machinery and equipment bearings;
(3) adequate lubrication function to adapt to high temperature, dusty, corrosive media and continuous operation of harsh working conditions;
(4) wide temperature fluctuation range to adapt to the continuous operation of metallurgical machinery and equipment wider temperature environment.
These bearings are easy to start, have low friction, are easy to maintain, and have a wide temperature range. Bearing in motion due to the thermal effect and friction, so that solid lubricating materials continue to seepage transfer, while the substrate wear, solid lubricating materials are gradually exposed, so inlaid into the composite solid lubricating materials have their own transfer and repair capacity, and thus long service life.
Bronze Base Material
- ZCuSn10Pb1: corrosion resistant, especially to dilute sulfuric acid, hydrochloric acid, and fatty acids. Structural material, corrosion-resistant, acid-resistant fittings as well as crusher bushings, and shaft tiles.
- ZCuSn10Pb5: lubricating function, good function and corrosion resistance, suitable for use as the bimetallic casting material. Bearings for vehicles, bimetallic shaft tiles for internal combustion engines with peak loads up to 100Mpa, as well as piston pin bushings, friction plates, etc.
- ZCuPb10Sn10: high hardness, good performance, not easy to seize the appearance, good casting and cutting function, excellent corrosion resistance in the atmosphere, and fresh water. Can be used for high load (below 20Mpa) and high sliding speed (8m/s) under the operation of parts, such as connecting rods, bushings, shaft tiles, gears, worm gears, etc.
- ZCuPb15Sn8: In the absence of lubricant and water lubricant conditions, graphite bushings’ sliding and self-lubricating functions are good, easy to cut, casting function is poor, and corrosion resistance to dilute sulfuric acid function is good. High external pressure and side pressure bearings, can be used to make copper cooling tubes for cold rolling mills, impact load resistant parts up to 50Mpa, bimetallic shaft tiles for internal combustion engines, piston pin bushings used primarily for larger loads up to 70Mpa, acid resistant accessories.
Physical & Chemical Properties
-
- Load Capacity: Up to 6,000 PSI (static) and 1,500 PSI (dynamic).
- Operating Temperature: -40°C to +300°C (-40°F to +572°F).
- Friction Coefficient: As low as 0.08 under dry conditions.
- Chemical Resistance: Resists water, acids, and alkalis.
Available Sizes
We offer both inch-sized and metric-sized graphite plugged bronze sleeve bushings to meet global standards:
- Inch Sizes: 0.25″ to 12″ OD, customizable lengths.
- Metric Sizes: 6mm to 300mm OD, tailored to your specifications.
Why Choose Bronzeoilless.com?
- Custom Solutions: Bespoke designs for unique applications.
- Fast Lead Times: Efficient production and global shipping.
- Quality Assurance: Rigorous testing for performance and reliability.
Self-Lubrication
One of the main advantages of graphite-plugged bronze bushings is their self-lubricating property. The graphite plugs within the bushing continuously release lubricant, eliminating the need for external lubrication and reducing maintenance requirements.
Low Friction
The presence of graphite plugs ensures low friction between the bushing and the moving parts, improving the overall efficiency of the machinery and reducing energy consumption.
High Load Capacity
The combination of bronze and graphite provides a high load-carrying capacity, allowing these bushings to support heavy loads and operate under harsh conditions.
Corrosion Resistance
Bronze alloys exhibit excellent corrosion resistance, making them suitable for applications in harsh environments or where exposure to corrosive agents is a concern.
Long Service Life
The self-lubricating and wear-resistant properties of graphite-plugged bronze bushings contribute to their extended service life, reducing the frequency of replacement and associated downtime.
Metallurgical equipment is in long-term high temperature, heavy load, impacted impact, dust, iron powder and water, lubricating oil and grease often fail. lubricating oil and grease often fail. But graphite plugged bronze bushing play a particularly good The performance of inlay bearings is particularly good. Since no oil is used, a series of auxiliary equipment for the oil pump tank is eliminated.
Since no oil is used, a series of auxiliary equipment for the oil pump tank is eliminated, which saves energy and reduces investment.
Get in Touch Today!
Upgrade your equipment with our high-performance graphite plugged bronze bushings. Contact us at una@viiplus.com for quotes, technical support, or custom requests.
Visit Bronzeoilless.com to explore our full product range!
Plug Graphite Bearing – Bronzeoilless.com – Where Cast Bronze Meets Cutting-Edge Lubrication Technology
Graphite plugged bushings are an excellent option for applications where low maintenance, extended service life, and high load-carrying capacity are required. They offer excellent resistance to wear, corrosion, and chemical attack, and can operate in a wide range of temperatures. If you are looking for a reliable, low-maintenance bearing solution for your equipment, Send email to us.
