JFB650 Metric Flanged Bearings, Custom Bushing Size
Discover the JFB650 Metric Flanged Bearings – a high-performance, self-lubricating solution crafted for demanding applications. Available in standard and custom bushing sizes, this oil-free bearing offers exceptional durability and low maintenance. Check out our detailed size chart to find the perfect fit and experience reliable, smooth operation with JFB650 bearings built to metric standards!
JFB650 Metric Flanged Bearings: Custom Sizes & Standard Oilless Bush Bearing Specifications for Versatile Industrial Applications
The JFB650 Metric Flanged Bearings, also known as an oilless bronze bushing with graphite plugs, is a high-performance self-lubricating bearing ideal for demanding industrial applications. Made from high-strength bronze alloy with embedded solid lubricants, this bearing delivers durability, low maintenance, and reliable performance in environments with high loads and frequent movement.
JFB650 is a self-lubricating flange bush material primarily used in mechanical engineering bearing components. It is based on a cast bronze (copper alloy) matrix embedded with graphite and other solid lubricants, forming a maintenance-free self-lubricating structure. This material is particularly suitable for high-load, low-speed, or intermittent motion scenarios, offering excellent wear resistance and corrosion resistance. Below is a comprehensive look at the JFB650 bearing’s standard metric sizes, custom options, structural advantages, material composition, performance characteristics, and applications, analyzed based on reliable industrial material data sources.
JFB 650 Flange Bush: Key Specifications & Dimensions
- Inner and Outer Diameter (ID & OD): JFB650 bearings are available with inner diameters ranging from 10mm to 120mm (extendable to 6–160mm in custom variants), while the outer diameter varies according to the inner diameter size. For example, a 15mm ID bearing has a 20mm OD, and a 100mm ID bearing has an OD of 120mm (up to 10–200mm for broader specs).
- Tolerance Standards: Inner diameter tolerances follow the E7 grade, ensuring precision and fitting accuracy. For instance, a 15mm ID has a tolerance of +0.040mm, and a 20mm OD has a tolerance of +0.034mm (general: d +0.032/+0.020mm). These tolerances make the JFB650 suitable for applications that demand close-fitting and high-performance bearings.
- Flange Outer Diameter & Thickness: The flange diameter increases with the ID, offering stability and ease of installation. For example, a 15mm ID bearing has a flange OD of 22mm (up to 10–240mm), while a 100mm ID bearing has a flange OD of 150mm. Flange thickness typically measures 1.6mm but can vary based on specific design requirements (2–10mm range).
- Length (L): Lengths are customizable to meet various application needs, with typical tolerances ranging from -0.10 to -0.30mm (5–40mm standard). This flexibility allows engineers to specify the optimal length for each use case.
- Additional Specifications: Additional details, like chamfers (R), may also be customized according to design and application requirements. Custom variants like JFB650S5 (high-hardness) are available for enhanced performance.
JFB650 Metric Flanged Bearings: Performance & Material Characteristics
Material Composition
The JFB650 bearing is constructed from a high-strength copper alloy base matrix, enhanced with a specialized blend of solid lubricants such as high-purity graphite or molybdenum disulfide (MoS₂). This innovative combination delivers superior wear resistance and facilitates smooth, low-friction performance throughout an extended service life, making it ideal for maintenance-free applications.
- Base Material: Cast bronze (typical alloy composition: CuZn25Al5Mn4Fe3 or similar CuAl10Ni5Fe5), with a density of approximately 7.8–8.0 g/cm³.
- Lubricant: Embedded graphite plugs (Graphite Plugs), comprising about 20-30% of the volume, enabling self-lubrication without requiring additional oil.
- Manufacturing Process: Employs centrifugal casting, continuous casting, or sintering methods to achieve uniform distribution of the lubricants.
This composite structure ensures a consistently low friction coefficient (0.03–0.20) even in dry friction conditions.
Material Comparison
When compared to traditional oil-impregnated bronze bushings or steel-backed PTFE-lined bearings, JFB650 stands out for its embedded solid lubricants, which eliminate the need for external oil and provide enhanced durability in challenging environments. The following table outlines the JFB650 base material alongside key alternatives, highlighting differences in composition, properties, variants, and applications to aid in selection:
| Material Type | Typical Composition | Key Properties | Common Variants/Alternatives | Applications/Notes |
|---|---|---|---|---|
| JFB650 Base (Cast Bronze) |
(Cu ~66%, Zn 25%, Al 5%, Mn 4%, Fe 3%) or CuAl10Ni5Fe5 (Cu ~80%, Al 10%, Ni 5%, Fe 5%) |
– Density: 7.8–8.0 g/cm³ – Hardness: >210 HB – Tensile Strength: >450 N/mm² – Excellent wear/corrosion resistance; self-lubricating with graphite embeds |
JDB650 (same base + graphite plugs, 650# bronze designation) |
High-load bearings (e.g., excavators, hydraulic cylinders); ideal for dry/oil-free ops; Variants add steel backing for extreme loads |
| Phosphor Bronze Alternative |
CuSn8 (Cu ~92%, Sn 8%, P trace) |
– Density: 8.8 g/cm³ – Hardness: 70–120 HB – Good fatigue resistance; requires oil lubrication – Moderate corrosion resistance |
CuSn6, CuSn10 (higher/lower tin for wear vs. machinability) |
Wrapped bushings in pumps/gears; less suitable for dry friction than JFB650; cheaper but higher maintenance |
| High-Tensile Brass Alternative |
CuZn39Pb3 (Cu 58–63%, Zn 35–40%, Pb 2–3.5%) or enhanced with Mn/Fe |
– Density: 8.5 g/cm³ – Hardness: 80–150 HB – High machinability; good shock absorption – Fair corrosion resistance; not self-lubricating |
CuZn25Al5 (aluminum brass variant for marine use) |
Automotive fittings, valves; alternative for lower-load apps; easier to machine than bronze but lower heat tolerance (~200°C max) |
| Aluminum Bronze Variant |
CuAl10Fe5Ni5 (similar to JFB650’s alternate; Cu 80–85%, Al 9–11%, Fe/Ni 4–5% each) |
– Density: 7.5–7.8 g/cm³ – Hardness: >200 HB – Superior seawater corrosion resistance; high strength (>600 N/mm²) – Embeddable with lubricants |
C63000 (Ni-Al bronze for marine) |
Marine propellers, mining equipment; direct upgrade for corrosive environments; JFB650 often uses this as a base for wet apps |
Overall Edge: JFB650’s bronze-graphite hybrid excels in shock absorption and corrosion resistance (e.g., to seawater and chemicals) over plain alloys, with a low linear thermal expansion coefficient of 1.6–1.9 × 10⁻⁵ /°C ensuring dimensional stability. It reduces maintenance by up to 80% and extends lifespan 2-3 times in dusty or corrosive settings compared to traditional bronzes, while outperforming polymers in load capacity (>450 N/mm² static vs. <100 N/mm²) and temperature tolerance (up to +300°C vs. +150°C) for heavy-duty metal-on-metal contacts—though polymers may offer quieter operation in low-noise scenarios.
Mechanical & Physical Performance
JFB650 materials excel in mechanical properties, suitable for high-impact and corrosive environments. Here’s a summary of key performance parameters:
| Property Category | Specific Parameter | Value/Range | Notes |
|---|---|---|---|
| Hardness | Brinell Hardness (HB) | >210 (base), high-hardness variant >800 | Strong wear resistance |
| Tensile Strength | Tensile Strength (N/mm²) | >450 | High load capacity |
| Yield Strength | Yield Strength (N/mm²) | >750 | Deformation resistance |
| Elongation | Elongation (%) | >12 | Good toughness |
| Friction Coefficient | Dry friction conditions | 0.03–0.20 | Self-lubricating effect |
| Load Capacity | Static Load (N/mm²) Dynamic Load (N/mm²) | >450 >200 | Suitable for impact loads |
| PV Value | Pressure-Velocity Limit (N/mm² · m/s) | 1.8–3.25 | Wear limit indicator |
| Temperature Range | Operating Temperature (°C) | -40 ~ +300 (up to +400 with water lubrication) | High-temperature resistance |
| Maximum Speed | Dry Friction Speed (m/s) | 0.15–2 | Low-speed preferred |
| Thermal Conductivity | Thermal Conductivity (W/m·K) | ~60 | Good heat dissipation |
| Corrosion Resistance | Chemical Stability | Excellent (resistant to water, seawater, chemicals) | Suitable for harsh environments |
These properties ensure low compression deformation (<0.01 mm @ 300 N/mm²), maintaining stable operation.
Performance Characteristics Analysis
- Self-Lubricating Mechanism: Graphite plugs release lubricants during friction, forming a transfer film that minimizes metal-to-metal contact, reducing wear and noise. Ideal for oil-free environments, cutting energy consumption.
- Wear & Impact Resistance: High-hardness base handles heavy loads (static >450 N/mm²), suiting intermittent oscillatory motion; low friction extends lifespan (2-3x traditional bearings).
- Environmental Adaptability: Strong corrosion resistance in humid, chemical, or high-temperature settings; low thermal expansion for stability.
- Limitations: Not ideal for ultra-high-speed continuous runs (>2 m/s);
Applications for JFB650 Metric Flanged Bearings
These flanged bearings are widely used across various industries due to their self-lubricating properties, high load capacity, and resistance to harsh conditions. The flange design provides axial fixation, enhancing installation stability and load distribution:
- Plastic Injection Molding and Automotive Tooling: In high-load, repetitive environments, such as mold guides and ejector pins, reducing maintenance needs. Specific parts: Automotive steering knuckles and suspension pivots.
- Heavy Machinery and Hydraulic Cylinders: Perfect for construction and engineering machinery, like excavator boom hinges and hydraulic piston rods, offering smooth operation in tough conditions.
- Marine and Mining Equipment: Corrosion-resistant for low-speed, heavy-load apps, including ship propeller shafts, mining excavator swing bearings, and gearbox supports.
- Steel Mills and Metallurgy Equipment: Withstands high temperatures in continuous casting machine rolls, rolling mill stands, and gear drives.
- Food Processing and Turbines: Oil-free for clean ops in food conveyor pivots and turbine shaft journals; also in agricultural harvester axles, fans, and pumps.
Broader domains include automotive (engines, drive shafts), heavy machinery (casting machine rollers), energy (dam gates, hydraulic turbines), and more.
Custom Sizes & Flexible Options for JFB 650 Metric Flanged Bearings
The JFB650 Metric Flanged Bearing is available in a wide range of sizes to meet specific needs. Custom sizing options include:
- Inner Diameter (ID) ranging from 10mm to 120mm (up to 6–160mm)
- Outer Diameter (OD) (10–200mm)
- Flange Outer Diameter and Thickness (10–240mm, 2–10mm)
- Length (L) based on project requirements (5–40mm)
These customizable specifications ensure the bearing fits precisely into its designated role, offering optimal performance in each unique application.
JFB650 Metric Flanged Bearings are the go-to solution for industries that need reliable, oil-free bearings that offer strength, wear resistance, and longevity. Their ability to function under high-load, high-temperature, and high-dust conditions without the need for added lubrication makes them an efficient, low-maintenance choice. Advantages include:
- Maintenance-Free: No pre-lubrication or refills, minimizing downtime and costs.
- Eco-Efficient: Reduces oil use, lowering energy and pollution.
- Cost-Effective: Standardized sizes for easy install; long life for low TCO.
Whether using standard sizes or customizing to precise specifications, JFB650 bearings support your operations with durability and consistent performance across demanding industrial applications.
