1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of the SKF 25440 LDS & Small Bore Seal. Please read this manual thoroughly before use to ensure safe and effective application and to maximize the lifespan of the product.
2. Product Overview
The SKF 25440 is a high-quality LDS (Low Drag Seal) and small bore seal designed for various industrial applications. It features an R Lip Code and CRW1 Style, engineered with precise metric dimensions to provide effective sealing solutions.
Figure 1: SKF 25440 LDS & Small Bore Seal. This image displays the circular seal, featuring a dark grey inner sealing element and a teal-colored outer casing, designed for robust sealing performance.
Key Features:
- Specifically designed for small bore applications, ensuring a precise fit.
- Incorporates R Lip Code and CRW1 Style for optimized sealing characteristics.
- Metric dimensions: 65mm Shaft Diameter, 100mm Bore Diameter, 8mm Width, for compatibility with standard metric systems.
- Manufactured by SKF, a globally recognized leader in bearing and seal technology.
3. Installation
Proper installation is critical for the longevity and optimal performance of the SKF 25440 seal. Adhere to the following guidelines carefully:
- Preparation: Ensure that both the shaft and bore surfaces are meticulously clean, smooth, and completely free from any burrs, nicks, or scratches. Surface imperfections can severely compromise the seal's integrity and effectiveness.
- Lubrication: Apply a thin, even layer of a compatible lubricant to the seal lips and the shaft/bore surface immediately prior to installation. This step significantly reduces friction and helps prevent damage during the assembly process.
- Alignment: Carefully align the seal with the bore. It is crucial to avoid cocking or tilting the seal during insertion to prevent uneven seating or damage.
- Pressing: Utilize an appropriate installation tool or a press to gently and evenly press the seal into the bore. Never use sharp objects or apply excessive force, as this can deform or permanently damage the seal. Confirm that the seal is seated squarely and fully within the bore.
- Inspection: After installation, visually inspect the seal to confirm it is correctly seated. Verify that the sealing lips are not inverted, folded, or otherwise damaged.
Note: For specific machinery or complex installation scenarios, always consult the equipment manufacturer's service manual or seek assistance from a qualified technician.
4. Operating Conditions
The SKF 25440 seal is engineered to operate efficiently within specific parameters. Adhering to these conditions will ensure optimal performance, reliability, and extend the seal's operational lifespan.
- Temperature Range: Operate the seal strictly within the specified temperature limits for its material composition. Exposure to extreme temperatures outside this range can lead to premature degradation of the seal material.
- Pressure: Do not exceed the maximum recommended pressure for this specific seal type. Operating under excessive pressure can cause seal extrusion, accelerated wear, or catastrophic failure.
- Shaft Speed: Ensure that the shaft speed remains within the seal's design limits. High rotational speeds beyond these limits can generate excessive heat, leading to premature wear and seal failure.
- Media Compatibility: Always verify that the seal material is fully compatible with the fluid or gas it will be sealing. Incompatible media can cause chemical degradation, swelling, or hardening of the seal.
5. Maintenance
Regular and proper maintenance practices are essential to extend the service life of your SKF seal and ensure its continued reliable performance.
- Periodic Inspection: Conduct regular visual inspections of the seal for any signs of wear, cracking, hardening, or evidence of leakage. Early detection of issues can prevent more significant problems.
- Lubrication: Ensure that adequate lubrication is consistently maintained around the seal area, as specified by the equipment manufacturer. Proper lubrication is vital for reducing friction and heat.
- Replacement: Replace seals at the recommended service intervals or immediately if any signs of damage, excessive wear, or leakage are observed. Do not attempt to repair damaged seals; always replace them with new, genuine SKF parts.
- Storage: Store spare seals in a cool, dry place, away from direct sunlight, sources of ozone (e.g., electric motors), and excessive heat. Proper storage prevents material degradation before use.
6. Troubleshooting
This section provides guidance on common issues that may arise with seals and offers potential solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Leakage | Improper installation, worn seal, damaged shaft/bore, incorrect seal size, excessive pressure. | Re-install correctly, replace seal, inspect and repair shaft/bore, verify seal dimensions, reduce operating pressure. |
| Premature Wear | Lack of lubrication, abrasive contaminants in media, excessive temperature/speed, misaligned components. | Ensure proper lubrication, filter media, check operating conditions against specifications, verify component alignment. |
| Seal Hardening/Cracking | Prolonged exposure to high temperatures, incompatible media, ozone exposure, age. | Verify operating temperature is within limits, check media compatibility, ensure proper storage for spares, replace seal. |
If issues persist after attempting these solutions, it is recommended to contact a qualified technician or SKF customer support for further assistance.
7. Specifications
Detailed technical specifications for the SKF 25440 LDS & Small Bore Seal are provided below:
| Attribute | Value |
|---|---|
| Model Number | 25440 |
| Seal Type | LDS & Small Bore Seal |
| Lip Code | R |
| Style | CRW1 |
| Shaft Diameter | 65mm |
| Bore Diameter | 100mm |
| Width | 8mm |
| Product Dimensions | 9.84 x 0.31 x 3.94 inches |
| Item Weight | 1.14 ounces |
| Manufacturer | SKF |
| Date First Available | November 2, 2010 |
8. Warranty and Support
For comprehensive information regarding warranty terms and conditions applicable to the SKF 25440 LDS & Small Bore Seal, please refer to the official SKF website or contact SKF customer support directly. SKF is committed to providing extensive support for all its products.
SKF Official Website: www.skf.com
Manufacturer: SKF
