Self-Lubricated Sleeve Bearings
Metal and Bimetal bearings
The Metal and Bimetal bearings, including Bronze Bearings and Steel Bushings, are designed to enhance reliability, durability, and cost-efficiency in various industrial applications. These bearings are particularly noted for their excellent corrosion resistance, structural properties, and versatility in use.
The table you provided details the bore machining and unmachinable thickness tolerances for JF Bimetal bearings. These tolerances are critical for ensuring the bearings meet precise dimensional requirements during manufacturing and assembly. Below is a clear interpretation of the data:
JF Bimetal Bore Machining and Unmachinable Thickness Tolerances
| Nominal Thickness (mm) | Inner Hole Unmachinable Thickness Tolerance (mm) | Machinable Thickness Tolerance of Inner Hole (mm) |
|---|---|---|
| 1.0 | -0.025 | +0.25 / +0.15 |
| 1.5 | -0.030 | +0.25 / +0.15 |
| 2.0 | -0.035 | +0.25 / +0.15 |
| 2.5 | -0.040 | +0.30 / +0.15 |
| 3.0 | -0.050 | +0.30 / +0.15 |
| 3.5 | -0.025 | +0.30 / +0.15 |
Explanation of Terms:
- Nominal Thickness:
- This is the standard or target thickness of the bimetal bearing material.
- Inner Hole Unmachinable Thickness Tolerance:
- This refers to the allowable deviation in thickness for the inner hole when it cannot be machined further after the initial manufacturing process.
- The values are negative, meaning the thickness can be slightly less than the nominal thickness but not more.
- For example, for a nominal thickness of 1.0 mm, the unmachinable thickness can range from 0.975 mm to 1.0 mm.
- Machinable Thickness Tolerance of Inner Hole:
- This refers to the allowable deviation in thickness for the inner hole when it can be machined further to achieve precise dimensions.
- The values are positive, meaning the thickness can be slightly more than the nominal thickness.
- The tolerance is given as a range (e.g., +0.25 / +0.15), which likely represents the upper and lower limits of the acceptable range.
- For example, for a nominal thickness of 1.0 mm, the machinable thickness can range from 1.15 mm to 1.25 mm.
Key Points:
- Unmachinable Tolerance:
- Used when the inner hole cannot be further machined after initial manufacturing.
- Ensures the part fits within specified limits without additional processing.
- Machinable Tolerance:
- Used when the inner hole can be machined to achieve precise dimensions.
- Allows for finer adjustments during assembly or installation.
- Applications:
- These tolerances are essential for ensuring proper fit and functionality in applications such as industrial machinery, automotive components, and heavy equipment.
- They help prevent issues like excessive play or tight fits, ensuring reliable performance.
Example Interpretation:
For a nominal thickness of 2.5 mm:
- Unmachinable Tolerance: The inner hole thickness can range from 2.460 mm to 2.500 mm.
- Machinable Tolerance: The inner hole thickness can range from 2.650 mm to 2.800 mm.
This table is a valuable reference for manufacturers and engineers working with JF Bimetal bearings, ensuring compliance with dimensional standards and optimal performance in their applications. If you need further clarification or additional details, feel free to ask!
The Bimetal Metal & Bimetal Bearings, including Bronze Bearings and Steel Bushings, are widely used across various industries due to their durability, reliability, and excellent performance under demanding conditions. Below is a detailed breakdown of their applications in construction machinery and the automobile industry, as well as other specialized uses:
Applications in Construction Machinery:
Bimetal bearings and bushings are critical components in construction machinery, where they provide support, reduce friction, and withstand heavy loads. Common applications include:
- Supporting Wheel Bushings:
- Used in the wheels of heavy machinery to support axial and radial loads while ensuring smooth rotation.
- Towing Wheel Bushings:
- Essential for towing mechanisms, providing durability and resistance to wear in high-stress environments.
- Tensioner Bushings for Chassis Running Mechanisms:
- Used in the chassis to maintain proper tension in tracks or belts, ensuring efficient operation and reducing wear.
Applications in the Automobile Industry:
In the automotive sector, bimetal bearings and bushings are used in various components to enhance performance, reduce friction, and extend the lifespan of critical parts. Key applications include:
- Balance Shaft Bushing:
- Reduces engine vibrations and ensures smooth operation of the balance shaft.
- Steel Plate Pin Bushing:
- Provides a durable and low-friction interface for steel plate pins in suspension systems.
- Steering Knuckle Main Shaft Bushing:
- Ensures smooth steering operation by reducing friction and wear in the steering knuckle.
- Connecting Rod Bushing:
- Used in the connecting rod to reduce friction between the piston and crankshaft, improving engine efficiency.
- Valve Rocker Arm Bushing:
- Supports the rocker arm in the valve train, reducing wear and ensuring precise valve operation.
- Camshaft Bushing:
- Provides a low-friction surface for the camshaft, ensuring smooth operation and longevity.
- Differential Bushing:
- Used in the differential to reduce friction and wear, improving power transmission efficiency.
- Transmission Bushing:
- Ensures smooth gear shifting and reduces wear in the transmission system.
- Internal Combustion Engine Main Bearing:
- Supports the crankshaft in the engine, providing durability and reducing friction.
- Thrust Washer:
- Used to manage axial loads in rotating components, preventing excessive wear and ensuring proper alignment.
Other Specialized Applications:
Bimetal bearings and bushings are also used in specialized machinery and equipment, such as:
- Piston Pump Side Piece:
- Provides a durable and low-friction surface in piston pumps, ensuring efficient fluid transfer.
- Gear Pump Side Piece:
- Used in gear pumps to reduce friction and wear, improving pump efficiency and lifespan.
Key Advantages of Bimetal Bearings and Bushings:
- Durability: The combination of steel backing and bronze or other alloy layers ensures long-lasting performance.
- Low Friction: The sintered copper alloy layer provides excellent wear resistance and reduces friction.
- Corrosion Resistance: Suitable for harsh environments, including exposure to moisture and chemicals.
- Cost-Effectiveness: Reduces maintenance costs and extends the lifespan of machinery and vehicles.
Summary:
Bimetal Metal & Bimetal Bearings, including Bronze Bearings and Steel Bushings, are indispensable in industries like construction machinery and automotive manufacturing. Their ability to withstand heavy loads, reduce friction, and operate reliably in demanding conditions makes them a preferred choice for critical applications. Whether in supporting wheels, engine components, or specialized pumps, these bearings and bushings play a vital role in ensuring efficiency, durability, and performance.
If you need further details or specific technical information, feel free to ask!
Below is a detailed overview of the different types of JF Bimetal Bearings, including their unique features and typical uses:
1. JF-930 Lead-Free Bimetal Bearing
- Material Composition:
- Base: Low-carbon steel.
- Overlay: Lead-free copper alloy (e.g., CuSn6.5P0.1 or similar).
- Key Features:
- Environmentally friendly, compliant with RoHS and other environmental regulations.
- Excellent wear resistance and fatigue strength.
- Suitable for high-load and high-speed applications.
- Applications:
- Automotive engines (e.g., connecting rod bushings, camshaft bushings).
- Industrial machinery requiring lead-free materials.
2. JF-800 Bimetal Bearing
- Material Composition:
- Base: Low-carbon steel.
- Overlay: Copper-based alloy (e.g., CuPb10Sn10 or CuSn8Ni).
- Key Features:
- High load-carrying capacity and fatigue resistance.
- Good conformability and embeddability.
- Suitable for applications with boundary lubrication conditions.
- Applications:
- Internal combustion engines (e.g., main bearings, connecting rod bearings).
- Heavy-duty machinery and equipment.
3. JF-820 Environmental Protection Bimetal Bearing
- Material Composition:
- Base: Low-carbon steel.
- Overlay: Environmentally friendly copper alloy (e.g., CuSn6.5P0.1 or CuAl10Fe5Ni5).
- Key Features:
- Compliant with environmental regulations (lead-free and low toxicity).
- Excellent corrosion resistance and wear performance.
- Suitable for applications requiring eco-friendly materials.
- Applications:
- Automotive and marine engines.
- Renewable energy equipment (e.g., wind turbines).
4. JF-720 Bimetal Bearing
- Material Composition:
- Base: Low-carbon steel.
- Overlay: Copper-based alloy (e.g., CuPb24Sn4 or CuSn8Ni).
- Key Features:
- High fatigue strength and load-carrying capacity.
- Good thermal conductivity and wear resistance.
- Suitable for high-speed and high-temperature applications.
- Applications:
- Diesel engines (e.g., crankshaft bearings, connecting rod bearings).
- Industrial compressors and pumps.
5. JF-20 High Tin Aluminum Base Bearing
- Material Composition:
- Base: Aluminum alloy with high tin content (e.g., AlSn20Cu).
- Key Features:
- Excellent corrosion resistance and fatigue strength.
- High load capacity and thermal conductivity.
- Suitable for applications requiring lightweight and durable materials.
- Applications:
- Automotive engines (e.g., main bearings, camshaft bearings).
- Marine and aerospace applications.
6. FB08G Bimetallic Graphite Lubricated Rolled Bearings
- Material Composition:
- Base: Low-carbon steel.
- Overlay: Copper-based alloy with embedded graphite.
- Key Features:
- Self-lubricating properties due to embedded graphite.
- Excellent wear resistance and low friction.
- Suitable for applications where external lubrication is difficult or impossible.
- Applications:
- Food processing machinery (dry running conditions).
- Agricultural equipment and conveyor systems.
Summary of Key Advantages Across the JF Bimetal Bearings Line:
- Durability: High fatigue strength and wear resistance ensure long service life.
- Versatility: Suitable for a wide range of applications, from automotive to industrial machinery.
- Environmental Compliance: Lead-free and eco-friendly options available.
- Performance: Excellent load-carrying capacity, thermal conductivity, and corrosion resistance.
Typical Applications Across Industries:
- Automotive: Engine bearings (main bearings, connecting rod bearings, camshaft bearings), transmission bushings.
- Industrial Machinery: Compressors, pumps, gearboxes, and heavy-duty equipment.
- Marine and Aerospace: Corrosion-resistant bearings for harsh environments.
- Renewable Energy: Wind turbine bearings and other eco-friendly applications.
If you need further details about a specific product or its applications, feel free to ask!
