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GMW17437 1st Edition, September 1, 2015 Classification Standard for Radial Lip Seal Materials
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Description / Abstract: Material Description. The radial lip seal materials described in Table 1 are defined using the material symbol representing the production intent seal construction for single or dual materials. Table 2 through Table 5 provide further characterization of the seal element properties using various combinations of symbols to build a line callout. See Section 8.
Symbols. Materials shall be identified according to SAE J2232 or VDA 260, except in the case of polytetrafluoroethylene (PTFE), which will be identified using SAE J1344, ISO 1043, or VDA 260.
Applicability. This standard provides an alpha numeric system for specifying significant properties of seal materials used in radial lip seal production drawings and in Vehicle Technical Specifications, Component Technical Specifications, Statement of Requirements, etc., in line callout form, as shown in Section 8. It is intended for crankshaft and camshaft seals used passenger car and light duty truck applications.
Specific codes are used for each print specified material (both primary and secondary lip). This applies to garter spring and springless, low friction lay-down lip seal construction. See Figure 1 and Figure 2.
Remarks.Cure Systems. For economic and/or performance reasons, the preferred lip seal cure system is defined in Table 1. The table represents the current Bill of Material for radial lip seals.
Seal compounds are characterized by their measured property changes after exposure to the conditions of this standard. Test fluid immersion time (168 h) is sufficient for compound property changes to reach equilibrium (see 3.5) for prolonged test times (e.g., 1008 h) yield similar results.
Qualifying Candidate Testing. Tests for primary lips (contacting the shaft) shall include properties from Table 2 through Table 7. If the secondary or dust lip is a different compound, use Table 3 through Table 7 (typically the front seal only). Fluid resistance (Table 6) for engines, shall include O1 and O2 as this is a global standard. Additional test fluids are at the direction of the part responsible design release engineer as designated in the Statement of Requirements (SOR) or Component Technical Specification (VTS) documents.
Symbols. Materials shall be identified according to SAE J2232 or VDA 260, except in the case of polytetrafluoroethylene (PTFE), which will be identified using SAE J1344, ISO 1043, or VDA 260.
Applicability. This standard provides an alpha numeric system for specifying significant properties of seal materials used in radial lip seal production drawings and in Vehicle Technical Specifications, Component Technical Specifications, Statement of Requirements, etc., in line callout form, as shown in Section 8. It is intended for crankshaft and camshaft seals used passenger car and light duty truck applications.
Specific codes are used for each print specified material (both primary and secondary lip). This applies to garter spring and springless, low friction lay-down lip seal construction. See Figure 1 and Figure 2.
Remarks.Cure Systems. For economic and/or performance reasons, the preferred lip seal cure system is defined in Table 1. The table represents the current Bill of Material for radial lip seals.
Seal compounds are characterized by their measured property changes after exposure to the conditions of this standard. Test fluid immersion time (168 h) is sufficient for compound property changes to reach equilibrium (see 3.5) for prolonged test times (e.g., 1008 h) yield similar results.
Qualifying Candidate Testing. Tests for primary lips (contacting the shaft) shall include properties from Table 2 through Table 7. If the secondary or dust lip is a different compound, use Table 3 through Table 7 (typically the front seal only). Fluid resistance (Table 6) for engines, shall include O1 and O2 as this is a global standard. Additional test fluids are at the direction of the part responsible design release engineer as designated in the Statement of Requirements (SOR) or Component Technical Specification (VTS) documents.