Oil Seal Housing & Shaft Installation |
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| The subject of installation represents an area commonly overlooked when selecting an oil seal for an application. Studies have shown this area to be one of the major causes of premature seal failure. To assist the installation, the oil seal should be prelubricated with grease or oil to reduce sliding friction of contact surfaces. This will also help protect the seal lips during initial run-in. HOUSING INSTALLATION The use of a tool can make installation easier and lower the possibility of seal cocking. A hydraulic or pneumatic press is advised to supply necessary force to install the seal. SHAFT INSTALLATION The advisable sequence of installation is to install the seal over shaft and then into the housing bore. Care should be exercised not to damage or deform the seal lip. The proper chamfer angle will minimize this problem). When installing the seal over a keyway or spline, you should employ a sleeve or bullet to protect the sealing lip from being cut. When the shaft is installed through the seal, the centering guides for the shaft will prevent the deformation of lip and the dislodging of spring. If possible, the shaft should be rotated as it passes through the seal to reduce sliding friction. MISALIGNMENT PROBLEMS The majority of failures and leakage of oil seals are caused by damage on the sealing lip. Misalignment problem is another essential factor that will influence getting good results which also need strict attention. (A) Eccentricity on shaft and housing, (B) Insufficient concentricity of seal body, both factors will cause serious damages after shaft rotating. |
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