Timken Industrial Seal Catalog

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Oil Seals Appendix D – Seal Damage Analysis Appendix D – Failure Analysis Oil Seals Fractured Element Problem Seal fractures or splits Potential Cause Potential Solution • Damage during • Change installation techinstallation nique to prevent seal damage • Excessive load • Do not allow seal to carry the weight of the shaft • Thermal degradation • Reduce operating temperature or upgrade to a compatible seal element • Insufficient lubrication • Apply proper amount of lubrication at sealing interface during installation Low Lubrication Levels Problem Cracks or wear patterns develop, hindering sealing capabilities Potential Cause Potential Solution • Insufficient lubrication • Increase lubrication during installation • High internal pressure • Decrease internal pressure Excessive Shaft Wear Problem Excess wear groove in shaft Potential Cause Potential Solution • Abrasive damage during • Clean shaft and seal installation prior to installation • Abrasive damage during • Prevent abrasive materials operation from collecting at sealing interface during operation • Soft shaft material Make sure shaft hardness is sufficient for seal specifications 42 Seal Element Damage Problem Seal element has nicks, cuts or tears Potential Cause Potential Solution • Rough surface finish • Refinish shaft to seal on shaft specifications • Damage during • Change installation techinstallation nique to prevent damage Spring Delamination Problem Sealing element and spring separate, causing leakage Potential Cause Potential Solution • Excessive load • Upgrade to seal material with higher misalignment capabilities • Excessive operating • Upgrade to seal material temperature with higher temperature capabilities Thermal Delamination Problem Cracks occur on sealing lip, causing leakage and contamination Potential Cause Potential Solution • High temperature at • Upgrade to seal material sealing interface that is compatible with application’s temperature requirements, or reduce application’s operating temperature
Relationship Between RPM, FPM and Shaft Diameters Oil Seals Appendix E – Surface Speed Chart 10000 9000 8000 7000 6000 5500 5000 4500 4000 3500 3000 2500 2000 1500 1000 900 800 700 600 550 500 450 400 350 300 250 200 150 100 RELATIONSHIP BETWEEN RPM, FPM AND SHAFT DIAMETER An approximate method of calculating peripheral speeds is as follows: Shaft Diameter (in inches) x RPM x 0.26. FPM To convert RPM to FPM, set straight edge on known factors (shaft diameter and RPM). The center line will indicate FPM. As illustrated above, a 1 inch shaft turning 3500 RPM’s converts to 900 FPM. RPM SHAFT DIA. 10000 9000 8000 7000 6000 5000 4000 3000 2500 2000 1500 1000 900 800 700 600 500 400 300 250 200 150 100 90 80 70 60 50 40 30 25 20 15 10 10 9 8 7 6 5 4 3 2.5 2 1.5 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.25 0.2 0.1 7 1/2 6 1/2 5 1/2 4 1/2 3 3/4 3 1/2 3 1/4 2 3/4 2 1/2 2 1/4 1 7/8 1 3/4 1 5/8 1 1/2 1 3/8 1 1/4 1 1/8 15/16 7/8 13/16 3/4 11/16 5/8 9/16 1/2 7/16 3/8 11/32 5/16 9/32 1/4 7/32 3/16 5/32 1/8 43
Page 1: Timken Industrial Seal Catalog High
Page 4 and 5: Introduction At Timken, customers t
Page 7 and 8: Technology Overview Turn to Timken
Page 9 and 10: Engineering Data Comparing Shaft Le
Page 11 and 12: Engineering Data Table 7: Shaft and
Page 13 and 14: Seals Installation Instructions Ins
Page 15 and 16: Seal & Material Selection Seal Sele
Page 17 and 18: Oil Seals Product Information Large
Page 19 and 20: Oil Seals Product Information Large
Page 21 and 22: Oil Seals Product Information Shaft
Page 23 and 24: Oil Seals Product Information Speci
Page 25 and 26: Bearing Isolators Configurations Bo
Page 27 and 28: Bearing Isolators Product Informati
Page 29 and 30: Glossary Width Assembled Seal made
Page 31 and 32: Oil Seals Appendix A - Product Iden
Page 37 and 38: Oil Seals Appendix B - Obsolete App
Page 39 and 40: Oil Seals Appendix C - Compound Com
Page 45 and 46: Oil Seals Appendix D - Failure Anal
Page 47: Oil Seals Appendix D - Failure Anal
Page 52 and 53: M-2
Page 54 and 55: Oil Seals by Model Number Model Num
Page 56 and 57: Product Inches MM Model Code ID OD
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Product Inches MM Model Code ID OD
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Product Inches MM Model Code From I
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Seals by Shaft size
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Using This Catalog The following pa
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Oil Seals by Model Number Product I
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Face Seals by Model Number Product
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Oil Seals by Model Number
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Timken Industrial Seal Catalog

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