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TIMKEN Europe
NSC Info Section

NSC Info Section

Product catalog summary

Overview
Timken provides a wide range of industrial sealing solutions under the National® brand, catering to both original equipment manufacturers and the aftermarket. These seals are made from innovative materials to enhance performance and longevity across various industrial applications. Timken's extensive distribution network ensures efficient delivery.

Redi-Seals®
Redi-Seals are custom-made sealing solutions available within 24 hours to minimize downtime. They are tailored to specific design, size, application, and material requirements. Specifications include:

Seal design or type
Size range: 0.827" (21mm) to 13" (330mm)
Materials: Nitrile or Viton®
Applications: Industrial, agricultural, vehicular

They are not recommended for rear-wheel bearing seals and nuclear applications.

Redi-Sleeves®
Redi-Sleeves are precision stainless steel wear sleeves that enhance the sealing surface for shafts, offering a cost-effective solution for repairing grooved or worn shafts. Features include:

Durable stainless steel construction
Ultra-thin design for minimal lip loading
Available for shafts from 0.5" (12.7mm) to 8" (203mm)

Shaft Repair Kits
These kits include a seal and a Redi-Sleeve, providing a time-saving and cost-effective alternative to shaft replacement.

Zero Duplication™ Program
This program reduces inventory while providing comprehensive coverage with oil seals designed for applications with shaft diameters up to 12" or 300mm. Key features include:

Spring-loaded, dual-lip sealing element
Double-wall case for stability
Redi-Coat® coating for leak-proof sealing

Available in Gold, Silver, and Bronze stocking plans.

Product Specification Section
This section includes comprehensive data on Timken's National industrial seals, such as size listings, material selection guides, compatibility charts, recommended operation conditions, installation instructions, and troubleshooting guidelines.

Interchange Guide
This guide helps convert competitor part numbers to corresponding seals, listing part numbers alphabetically and numerically.

Technical Section

Oil Seal Design and Selection: Discusses types of oil seals, nomenclature, and components, including a conversion chart for RPM to FPM.
Sealing Element Compounds: Details materials and compounds available for sealing elements.
Sealing System Preparation and Seal Installation: Covers storage, handling, shaft and bore requirements, and installation procedures.
General Information: Includes oil seal distress analysis, troubleshooting, and installation/removal of various sleeves.

Oil Seal Function
Oil seals prevent lubricant escape and exclude contaminants, crucial for precision bearings and machine components. They also separate dissimilar fluids or gases.

National Seal Part Numbering System
Describes the numbering systems for general and special purpose seals, including specific blocks for different seal types.

Material Selection Factors
Key factors in selecting materials for seals include lubricant temperature and type. National Oil Seals provides various sealing lip materials and compounds, with temperature limits and fluid compatibility detailed in the Compound Selection Chart.

Seal Application and Performance
National Seals are used in diverse applications, relying on proper shaft and bore operation. Factors like runout, lubrication, misalignment, speed, and temperature can affect seal life. Recommendations are provided to optimize seal life.

Sealing Element Compounds
Various materials are available for sealing elements, each with specific advantages and limitations. For example, Felt is suitable for heavy lubricants but performs poorly at low speeds and in moist conditions. Leather offers good dry running but has poor heat resistance. Urethane is durable with good abrasion resistance but softens above 250°F.

Compound Selection Chart
The chart compares properties of different compounds like Nitrile, Acrylates, Vamac®, Silicone, Fluoroelastomers, and Aflas®. It includes durometer ratings, oil and abrasion resistance, and service temperature ranges.

Chemical Compatibility Ratings
The document provides a detailed table of chemical compatibility ratings for various elastomers, indicating their resistance to different chemicals.

Seal Material Shelf Life
Different elastomers have varying resistance to deterioration during storage. Proper storage conditions are crucial to minimize aging effects. The shelf life for different materials is as follows: Urethane (3-5 years), Nitrile (5-10 years), AFLAS®, Fluoroelastomer, Silicone, Polyacrylate, VAMAC® (up to 20 years), and Felt, Leather, PTFE (indefinite).

Shaft Requirements
For seal reliability, proper engineering of assembly components is necessary. Key shaft requirements include:

Shaft Finish: 10-25 microinches Ra with no machine lead.
Shaft Lead: Maximum permissible lead angle is 0 ± 0.05°.
Shaft Diameter: Specific tolerances based on diameter size.
Shaft Hardness: Minimum Rockwell C30, C45 if risk of damage exists.
Shaft Chamfer: Smooth chamfer or radius to aid installation.
Shaft-to-Bore Misalignment: Should be minimized to prevent uneven wear.
Dynamic Runout: Should be controlled to prevent seal damage.
Shaft Material: Steel, stainless steel, and certain cast irons are recommended.

Bore Requirements
Maintaining proper bore characteristics is crucial for sealing system integrity. Recommendations include:

Bore Tolerances and Seal Press Fit: Specific tolerances for metal and rubber O.D. seals.
Bore Material: Ferrous materials are preferred; consider thermal expansion for others.
Bore Finish: 125 microinches Ra or smoother is recommended.
Bore Configuration: Chamfered lead corner for ease of seal installation.

Seal Installation Procedures
Guidelines for proper seal installation include:

Inspect bore and shaft for cleanliness and damage.
Ensure proper seal direction and prelube the seal lip.
Use appropriate installation tools and avoid direct hammering on the seal.

Oil Seal Distress Analysis
A troubleshooting checklist for oil seal distress includes:

Sealing lip issues due to temperature, lubrication, or material incompatibility.
Excessive wear from misalignment or improper lubrication.
Installation errors leading to seal damage or improper seating.

Redi-Sleeves Installation and Removal
Redi-Sleeves are used for repairing worn shafts. Installation involves minimal shaft preparation and using the provided tool to position the sleeve. Removal can be achieved by applying heat or using wire cutters.

General Information
National Wear Sleeves are precision components designed to press fit onto a shaft, becoming part of it. They provide a surface finish of 10-25 microinches Ra and are installed at ambient temperatures without the need for heating. These sleeves help reduce costs for manufacturers by eliminating the need for machining complex shafts to tight tolerances.

Installation
1. Clean the sealing surface of dirt and oil.
2. Apply a liquid sealant or gasket cement to the shaft surface.
3. Press the wear sleeve into position using an installation tool or flat plate, avoiding hammering on the thin edge.
4. Remove excess sealant from the sleeve edges to prevent seal leakage.

Removal
Methods for removing wear sleeves include applying heat to expand the sleeve, tapping with a hammer to stretch it, or using a rounded chisel. It is not necessary to cut the sleeve completely before removal.

Shaft Tolerances
For shafts up to 3.000", the tolerance is ± .001". For shafts between 3.001" and 6.000", the tolerance is ± .0015".

V-Seals
V-Seals are versatile elastomeric seals made from Nitrile or Viton, used as primary sealing elements or contaminant excluders. They mount on and rotate with the shaft, with the lip lightly contacting the counterface. They are suitable for a wide range of shaft sizes and can accommodate eccentric or misaligned shafts.

Additional Products
Timken offers O-Ring Seal Kits in various sizes, installation tools like the RD-2000 Seal Driver, and other industrial products. For more information, contact Timken or visit their website.

Catalog excerpts

Timken is your resource for quick, cost-effective sealing of seals, call Timken in the U.S. at 1.877.4.TIMKEN and in Canada at 1.800.565.4927 for English and 1.800.565.0438 for French-Canadian. Visit us on the Web at www.timken.com/industrialseals National® is a registered trademark of Federal-Mogul Corp., licensed for use by The Timken Company. Redi-Sleeves®, Redi-Coat® and Redi-Seals® are registered trademarks of Federal-Mogul Corp. Zero Duplication™ and V-Seals™ are trademarks of Federal-Mogul Corp. Viton® is a registered trademark of DuPont Corporation. Timken® is the registered trademark of The Timken Company. www.timken.com ©2005 The Timken Company Printed in USA 20M 04-05-07 Order No. 7707 INDUSTRIAL SEALS CATALOG solutions. To learn more about how Timken can enhance your line National® Industrial Seals

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Seals Catalog Inside B Timken offers an extensive line of sealing solutions for original equipment manufacturers and the aftermarket. Our line of National ® industrial seals is made from innovative materials and process solutions that enhance life and performance in many industrial applications. This line of industrial seals adds value to the company’s portfolio of friction management solutions. The seals are backed by the company’s experienced technical support and distribution networks, giving distributors a single source for a wide range of bearings and value-added extras to help keep equipment...

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Seals Catalog Inside B National® Industrial Seals

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Seals Catalog Inside B Sealing Solutions Custom Made Overnight Timken offers cost-effective and quick sealing solutions that help reduce downtime and help keep equipment running smoothly. Redi-Seals® help minimize downtime since they are available within 24 hours and in the right quantities – even a single seal. Through an innovative manufacturing process, Redi-Seals are produced without long lead times, which offers distributors a more flexible and efficient way of doing business. Timken offers 11 types of Redi-Seals, custom made to fit your design, size, application, material and other specifications....

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Seals Catalog Inside B CUSTOM SEALS IN 24 HOURS Redi-Seal Specification Checklist Although Redi-Seals are manufactured to the same exacting standards and specifications as the stock product lines, exact dimensions are required before a seal can be made. Please review the specifications manual before contacting Timken. A Zero Duplication™ seal may already meet your sealing requirements. 1. Choose a style. NOTE: SLO and DLO also are available in split designs. 2. Measure the required dimensions to the nearest 0.001" or 0.05mm. ❏ Shaft Diameter ▲ ❏ Bore Diameter ❏ Width 3. Select the appropriate...

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Seals Catalog Inside B REPAIR DAMAGED SHAFTS ... OR PROTECT NEW ONES Redi-Sleeves® offered by Timken are precision stainless steel wear sleeves, designed to be pressed onto a shaft to provide an enhanced sealing surface. Redi-Sleeves are fast, inexpensive repair options for grooved or worn shafts. Redi-Sleeves are pressed onto a shaft where indications of seal wear, such as tracks or grooves, have developed. Using a Redi-Sleeve gives the shaft a smooth, ideal sealing surface. Fast, Inexpensive Shaft Repairs Timken’s line of Redi-Sleeves are easy to install and feature a removable flange and an...

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Shaft Repair Shaft Repair Kits provided by Timken save time and costly shaft replacements. These kits include the industry-tested, technician-approved seal in addition To order National industrial seals, contact your Timken sales representative or call 1.877.4.TIMKEN in the U.S. In Canada, call 1.800.565.4927 for English

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Seals Catalog Inside B Zero Duplication Program ™ Keep lubricants and other critical fluids in, water and other contaminants out. By consolidating your inventory into one systematic collection of premium-quality seals, the Zero Duplication program offered by Timken provides comprehensive coverage while minimizing the number of replacement seals you carry in inventory. Zero Duplication is an effective way to do more with less. This program features a special selection of oil seals that are designed to meet the requirements of applications with shaft diameters up to 12" or 300mm – with zero duplication...

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Seals Catalog Inside B MORE EFFICIENT, MORE PROFITABLE SEAL INVENTORY MANAGEMENT Trust Zero Duplication Seals for Optimal Performance Typically, a seal is replaced by an identical seal. Zero Duplication seals, however, offer performance equal and often superior to original seals. Even if the width, case design or sealing elements differ, Zero Duplication seals can provide optimal performance. Advantages of the Zero Duplication program: • Faster, more responsive service • Simple, easy replacement seal selection The Zero Duplication program offers tangible advantages for your customers: • Faster,...

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Seals Catalog Inside B Using This Catalog COMPLETE PRODUCT SELECTION DATA Product Specification Section The Specification section contains complete product data for Timken’s line of National industrial seals. Size Listings for each style and type of seal or sleeve, as well as Material and compound selection guide, Compound compatibility chart, Recommended operation conditions chart, Installation instructions and Troubleshooting guidelines, also are included. The Specification section contains an introduction, technical sections, complete size listings, numerical index, metric listing and seal/component...

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TABLE OF CONTENTS SECTION 1 - TECHNICAL A Oil Seal Design and Selection Types of Oil Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . National Seal Part Numbering System . . . . . . . . . . . . . . . . . . . The Seal and Its Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Oil Seal Nomenclature and Components . . . . . . . . . . . . . . . . . Conversion Chart - RPM to FPM . . . . . . . . . . . . . . . . . . . . . . . National Oil Seal Design Description . . . . . . . . . . . . . . . . . . . . Sealing Element Compounds Materials and Compounds Available...

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NSC Info Section

NSC Info Section

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