Timken Industrial Seal Catalog

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Oil Seals Appendix D – Seal Damage Analysis Appendix D – Failure Analysis Oil Seals The following information pertains to standard installations. If you have a special installation or need advice, contact your Timken sales representative. For more information on both seal and bearing damage analysis, go to www.timken.com/industrialseals. Carbonized Lubricant Problem Lubricant breaks down, deposits around the main sealing interface and interferes with sealing capabilities Potential Cause Potential Solution • Bearing lubricant • Use a lubricant that can becomes overheated withstand greater temperatures or decrease the temperature for current lubricant Case Damage Problem Seal case is damaged Potential Cause Potential Solution • Improper installation • Change installation technique to prevent damage • Improper shipping • Contact your Timken sales representative to discuss shipping alternatives and replacement 40 Chemical Degradation Problem Abnormal swelling or distortion of the sealing element Potential Cause Potential Solution • Sealing element material • Upgrade to sealing and the material being element that is compatible sealed (i.e. lubricant, with the material being coolant) are chemically sealed incompatible Delamination Problem Seal material separates, interfering with sealing capabilities Potential Cause Potential Solution Trapped air due to: • Improper installation • Change installation technique to prevent damage • Improper shipping • Contact your Timken sales representative to discuss shipping alternatives and replacement • Manufacturing defect • Contact your Timken sales representative to report manufacturing defect and arrange for replacement
Oil Seals Appendix D – Failure Analysis Fractured Carrier Spring Problem Ineffective sealing due to distortion or cracking of the carrier spring Potential Cause Potential Solution • Improper installation • Change installation technique to prevent damage • Excessive load • Do not allow seal to carry the weight of the shaft Excessive Leakage (Shaft/Seal Element) Problem Leakage occurs between shaft and seal lip Potential Cause Potential Solution • Incorrect seal/shaft size • Use correct seal size • Rough surface finish • Refinish shaft surface on shaft to seal specifications • Too much lubricant used • Reduce amount of during installation installation lubricant • Shaft machined lead • Refinish shaft surface (spiral grooves) to seal specifications • Cocked seal installation • Install seal squarely into housing bore • Excessive shaft • Move seal closer to movement (TIR) bearing • Previously mentioned • Reference previously failure modes mentioned sources/ solutions Excessive Leakage (Bore/Seal Case) Problem Leakage occurs between bore and seal case Potential Cause Potential Solution • Incorrect seal/bore size • Use correct seal size • Rough surface finish • Refinish bore surface on bore to seal specifications • Use of lubricant during • Do not use lubricant installation during installation (not recommended for the bore and seal case) • Cocked seal installation • Install seal squarely into housing bore Seal Damage Analysis – Appendix D Oil Seals Excessive Seal Element Wear Problem Wider than normal wear pattern on the surface of seal element Potential Cause Potential Solution • Excessive internal • Clean drain ports and pressure chamber vents or upgrade to seal with higher pressure capabilities • High misalignment/ • Upgrade to seal with runout higher misalignment/ runout capabilities • Rough surface finish • Refinish surface of shaft on shaft to seal specifications • Insufficient lubrication • Properly lubricate the seal • Extended seal service • Upgrade to extended service element material or change maintenance schedule to accommodate new seal life requirements • Oversized shaft • Use proper seal size Rolled Seal Element Problem Seal was rolled Potential Cause Potential Solution • Damage during • Change installation techinstallation nique or use proper tools to prevent seal damage 41
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: Oil Seals Appendix D - Failure Anal
Page 49: Relationship Between RPM, FPM and S
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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