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Large Bore Industrial Seal Catalog


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Large Bore Industrial Seal Catalog - 1

Timken Industrial Seal Catalog High Performance Seals • Large Bore Assembled Seals • Bearing Isolators

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Large Bore Industrial Seal Catalog - 4

Introduction At Timken, customers turn to us to for innovative solutions that solve their most critical issues. When they do, they benefit from more than a century of knowledge in managing friction and transmitting power for a variety of industries and applications. We’ve applied this technical know-how to offer OEMs, distributors and end-users a complete line of products and services – from bearings, maintenance tools and condition monitoring products to engineered surfaces, training programs, bearing and chock repair, and more. Now, from the people that brought you Timken industrial seals...

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Using This Catalog The following pages contain the information you need to make accurate decisions about the seals best suited for your standard applications. Our technical manual includes: Organization by seal type, with special sections for single lip, dual lip and specia purpose seals. These three sections include critical information for easy and accurate seal selection. • General engineering information, including nomenclature, technical specifications, tolerance charts and more. • Installation instructions, with diagrams, and troubleshooting tips for common problems. Tmken high...

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Large Bore Industrial Seal Catalog - 7

Technology Overview Technology Overview Timken Nitrile (N) Black Industrial Seals Taber Abrasion Resistance (ASTM D4060) Wear Index (mg/1000 loss) Oil Seals Creating the most advanced seals for heavy industrial markets requires quality materials. Timken industrial seals are manufactured using special elastomers that are engineered for high abrasion resistance, low wear and outstanding temperature and chemical resistance. In addition, we have materials and designs suited for a wide range of applications and our color-coded seals help you identify the seal to ensure you are using the right...

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Large Bore Industrial Seal Catalog - 8

Engineering Data General Specifications Timken industrial seals offer a leading combination of quality, technology and high performance. However, there are additional considerations – such as shaft finish, temperatures and other operating factors – that can help our seals achieve even higher levels of performance. We recommend the following practices to ensure that you are maximizing the efficiency and the life of your bearings and machinery. For specific application assistance, contact your Timken sales representative. Shaft Finish The amount of contact between the shaft surface and the...

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Large Bore Industrial Seal Catalog - 9

Engineering Data Engineering Data Comparing Shaft Lead – Lead Angle The lead of a shaft is compared with other shafts of differing diameters by calculating the lead angle. This is found by dividing the string advance (in inches) by the product of the shaft circumference (in inches), and the number of revolutions required to advance the string the measured amount. LEAD ANGLE = ARCTAN x String Advance (Shaft circumference) x (number of turns) For example, a string will advance 0.300" in 30 seconds on a 4.000" shaft rotating at 60 RPM. The lead angle equals 0.0456° = 2' 44.1". A 2" shaft with...

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Large Bore Industrial Seal Catalog - 10

Engineering Data Engineering Data Dynamic Runout Dynamic runout is the amount by which a shaft, at the sealing surface, does not rotate around the true center. You can measure dynamic runout by holding a dial indicator against the shaft surface while it is slowly rotated. The resulting measurement is called a total indicator reading, or TIR. See Figure 6. “Y” = Dynamic Runout “Y” Center of rotation of shaft Table 4: Maximum Pressure Limits Maximum Operating Pressure* Seal Type Standard Oil Seals PS-I Oil Seals Bearing Isolators * Maximum operating pressure decreases as surface speed...

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Large Bore Industrial Seal Catalog - 11

Engineering Data Engineering Data Table 7: Shaft and Bore Tolerances for Bearing Isolators Shaft Diameter inch Conversion Formulas Recommended Tolerance Conversion Formulas Inch (in) millimeter (mm) bar bar kilopascal (kPa) kilopascal (kPa) psi (lb/sq. in) psi (lb/sq. in) millimeter (mm) Inch (in) kilopascal (kPa) psi (lb/sq. in) bar psi (lb/sq. in) bar kilopascal (kPa) Shaft Diameter Recommended Tolerance Surface Speed Shaft finish, misalignment and runout, lubrication, pressure and seal design are all factors in determining safe operating speeds, and become more important the more the...

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Large Bore Industrial Seal Catalog - 12

Installation Instructions Installation Instructions Equipment Inspection and Preparation Before installing any lip seal, equipment should be thoroughly inspected. Follow the specifications below for best results: Shaft Surface Finish [Roughness Average or AA (Arithmetic Average)] • With the exception of PS-1 (Model 61), all seals should have a surface finish within 10-20 µ in. (0.25-0.50 µm). • For PS-1 (Model 61), the surface finish should be within 4-8 µ in (0.10-0.20 µm). • The surface finish direction of all seals must be perpendicular to the shaft axis of rotation. Bore Surface Finish,...

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Large Bore Industrial Seal Catalog - 13

Installation Instructions Installation Instructions Installation Methods Split Seal Installation Ambient pressure/ non-flooded applications only • Apply a thin coat of lubricant to the seal lip and shaft. • Split the seal along the axis of rotation (shown in Figure 12) and place the seal around the shaft. Installation Method A Thru Bore: Installation tool bottoms on machined face Installation Method B Thru Bore: Seal bottoms on machined bore shoulder Figure 12: Split Seal Separation Installation Method C Thru Bore: Installation tool bottoms on shaft • Beginning with the split ends, insert...

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Large Bore Industrial Seal Catalog - 14

Timken Bearing Isolators Installation Instructions Equipment Preparation Before installing an isolator, all equipment should be inspected. First, disconnect all power to the machinery and follow standard safety procedures to avoid personal injury or equipment damage during installation. Second, inspect the shaft and bore surfaces. The shaft finish should be better than 64 µin (1.63 µm) with minimal lead, but a polished surface is not required. The bore surface should be 64 µin (2.54 µm). Both the shaft and bore should have a chamfer or other edge relief to prevent the o-ring from shearing....

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