Instruction Manual

1. Introduction

This manual provides comprehensive instructions and important information for the proper handling, installation, and maintenance of Isostatic Oilube Powdered Metal Bronze SAE841 Sleeve Bearings/Bushings. These self-lubricating bearings are engineered for reliable performance in various industrial applications. Please read this manual thoroughly before use to ensure optimal performance and longevity of the product.

2. Product Overview

The Isostatic Oilube Powdered Metal Bronze SAE841 Sleeve Bearings are precision-engineered components designed for applications requiring self-lubricating properties. They are manufactured from SAE 841 powdered metal bronze, which consists primarily of copper (87-90%) and tin (8-9%), along with carbon and other elements. The porous structure of the powdered metal provides interconnected reservoirs for oil, ensuring continuous lubrication during operation.

Figure 1: Isostatic Oilube Powdered Metal Bronze SAE841 Sleeve Bearing. This image shows a cylindrical bronze bushing, appearing solid and metallic, with a central bore. The surface has a slightly textured, matte finish typical of powdered metal components.

Key Features:

• Self-Lubricating: Vacuum impregnated with SAE 30 oil (approx. 19% by volume) during manufacturing. Oil rises to the surface when in motion and restores itself when at rest.
• Material Composition: SAE 841 powdered metal bronze (87-90% copper, 8-9% tin, carbon, other elements).
• Versatile Application: Ideal for heavy loads at moderate speeds or light loads at high speeds.
• Temperature Range: Effective from +10°F to +175°F with standard oil.
• Compliance: RoHS, REACH, and DFARS compliant.
• Standard Stock: Available as standard stock products with varying tolerances by size.

3. Specifications

4. Installation Guidelines

Proper installation is crucial for the optimal performance and lifespan of your sleeve bearings. Follow these guidelines carefully:

1. Preparation: Ensure the housing bore is clean, free of burrs, and within specified tolerances. The shaft should also be clean and smooth.
2. Handling: Handle bearings with clean hands or gloves to prevent contamination. Avoid dropping or deforming the bearing.
3. Press Fit: These bearings are typically installed with an interference fit. Use an arbor press or a suitable installation tool to press the bearing into the housing. Apply steady, even pressure to the end face of the bearing. Do not hammer the bearing directly.
4. Alignment: Ensure the bearing is installed squarely and fully seated in the housing. Misalignment can lead to premature wear.
5. Shaft Insertion: Carefully insert the shaft into the bearing. Avoid forcing the shaft, which could damage the bearing's internal surface.
6. No External Lubrication Needed: Due to their self-lubricating nature, these bearings generally do not require additional external lubrication upon installation or during operation under normal conditions.

5. Operating Considerations

While self-lubricating, certain operating conditions can affect bearing performance:

• Load and Speed: Operate within the specified Pv (Pressure-velocity), P-Load (Pressure), and V-SFM (Surface Feet per Minute) limits to prevent overheating and excessive wear.
• Temperature: Maintain operating temperatures within the recommended range of +10°F to +175°F. Extreme temperatures can affect the lubricant's viscosity and effectiveness.
• Contamination: Protect the bearing from abrasive particles, dust, and corrosive environments. While the bearing is self-lubricating, external contaminants can still cause damage.
• Shaft Finish: A smooth shaft finish (typically 8-16 micro-inches Ra) is recommended for optimal bearing life and performance.

6. Maintenance

Isostatic Oilube bearings are designed for maintenance-free operation under normal conditions due to their self-lubricating properties. However, periodic inspection is recommended:

• Visual Inspection: Periodically inspect the bearings for signs of wear, such as excessive clearance, scoring, or discoloration.
• Cleanliness: Ensure the operating environment remains clean to prevent foreign particles from entering the bearing area.
• Re-lubrication: Under severe operating conditions (e.g., very high temperatures, extreme loads, or dusty environments), re-impregnation with oil may be considered. Consult a bearing specialist for guidance on re-lubrication procedures.
• Replacement: Replace bearings that show significant signs of wear or damage to prevent failure of the larger assembly.

7. Troubleshooting

This section addresses common issues that may arise with sleeve bearings:

8. Warranty and Support

For information regarding product warranty, technical support, or specific application questions, please contact the manufacturer, Isostatic, directly. Refer to the original product packaging or purchase documentation for official contact details and warranty terms.

When contacting support, please provide the following product information:

• Brand: Isostatic
• Model Number: AA-1526-2
• Item Number: 101667