JNA Oilless Guide Bush
JNA Oilless Guide Bush
Discover our plain bearings: Flange bearings, sleeve bushings, and thrust washers. Customizable bushing materials available. Our products are wear-resistant, maintenance-free, and designed to withstand dirt, dust, and corrosion.
JNA Oilless Guide Bushes: Excellence in Self-Lubrication
JNA Oilless Guide Bushes are specialized components designed for applications requiring minimal lubrication, often used in machinery and automotive molds. These bushes are made from a combination of high-strength brass and solid graphite, providing self-lubricating properties that reduce wear and maintenance needs.
In the world of industrial machinery, reducing friction, enhancing performance, and cutting maintenance costs are pivotal. Enter the JNA Oilless Guide Bush—a revolutionary self-lubricating bearing crafted from high-strength brass and graphite. These guide bushes stand out in their ability to enhance machinery life while requiring minimal upkeep, making them an invaluable asset across various industrial sectors.
Unmatched Durability and Performance
JNA Oilless Guide Bushes are designed to withstand rigorous conditions, offering exceptional wear resistance. The incorporation of graphite within the brass matrix allows for continuous self-lubrication, ensuring that the components operate smoothly without additional lubricants. This feature is particularly beneficial in environments where lubrication can be challenging or where contamination from grease must be avoided.
Wide-Ranging Applications
These guide bushes find extensive applications in the automotive industry, particularly in the molds for car cover parts, and are also prevalent in large-scale stamping molds among other settings. Their ability to reduce friction significantly not only enhances the operational efficiency of machinery but also extends the life span of the components, thereby reducing downtime and maintenance interventions.
Customization and Specifications
The JNA Oilless Guide Bushes come in a variety of sizes to meet diverse industrial needs. Beyond standard dimensions, they offer customized solutions tailored to specific customer blueprints. This flexibility ensures that they can meet both standard and non-standard product requirements across different countries.
Getting Your Guide Bush
Oilless Guide Bushes
Plugged Graphite
Key Features of JNA Oilless Guide Bushes
Material Composition: JNA Oilless Guide Bushes are crafted from high-strength brass, such as CuZn25Al6Fe3Mn3, enhanced with solid graphite inserts. This composition is pivotal for their self-lubricating properties, ensuring smooth operation without the need for external lubricants.
Dimensions: The product line includes various sizes tailored to meet specific requirements. For instance, the JNA-11 model boasts a diameter of 25 mm and a length of 58 mm, whereas the JNA-20 model measures 160 mm in diameter and 220 mm in length, catering to diverse industrial applications.
Operating Conditions: Engineered to perform under extreme conditions, these bushes excel in environments with temperatures up to 300 °C and pressures reaching 120 N/mm². They are adept at managing dynamic loads and are ideal for machines with intermittent or oscillatory movements, such as those found in plastic machinery and automotive manufacturing lines.
Performance Characteristics:
- Friction Coefficient: Exhibits a low friction coefficient, around 0.16 in dry conditions, which can decrease to as little as 0.03 when oil lubrication is applied.
- Load Capacity: These bushes are capable of supporting heavy loads, withstanding maximum pressure between 100 and 120 N/mm².
- Speed Limitations: The maximum operating speed is about 0.5 m/s, with a PV limit of 1.65 N/mm²·m/s, ensuring efficient performance under varied speed conditions.
Applications:
- Automotive Industry: Ideal for mold components and equipment requiring high precision and durability, where regular lubrication is impractical.
- Plastic Machinery: Optimal for high-wear processes where conventional lubrication might fail.
- Industrial Equipment: Excellently suited for machinery operating under heavy loads and high temperatures.
Conclusion: JNA Oilless Guide Bushes represent a robust solution for applications demanding self-lubricating components. Their strong design and superior material properties make them indispensable in harsh environments, significantly reducing maintenance needs and boosting operational efficiency.
| Standard No. | D1 (mm) | H6 (mm) | D2 (mm) | g6 (mm) | D3 (mm) | D4 (mm) | L1 (mm) | L2 (mm) | L3 (mm) | R1 (mm) |
|---|---|---|---|---|---|---|---|---|---|---|
| JNA32 x 50 | 32 | 40 | 40 | -0.009 | 50 | 40 | 50 | 40 | 4 | 3 |
| JNA40 x 63 | 40 | +0.016 | 50 | -0.025 | 63 | 50 | 63 | 50 | 5 | 3 |
| JNA50 x 71 | 50 | 0 | 63 | -0.010 | 71 | 63 | 71 | 56 | 6 | 5 |
| JNA63 x 80 | 63 | +0.019 | 80 | -0.029 | 90 | 80 | 80 | 63 | 8 | 6 |
| JNA80 x 100 | 80 | 0 | 100 | -0.012 -0.034 | 112 | 100 | 100 | 80 | 10 | 8 |
| JNA100 x 125 | 100 | +0.022 | 125 | -0.014 | 140 | 125 | 125 | 106 | 12 | 10 |
| JNA115 x 140 | 115 | 0 | 140 | -0.039 | 155 | 140 | 140 | 120 | 12 | 10 |
This table lists the standard numbers and dimensions for various models of JNA Oilless Guide Bushes.
Note: in addition to the above specifications of size, manufactured according to customer drawings
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