Installing rod seals

The method of installation and the possible groove types for rod seals depend on the materials, seal design and ratio between the diameter and cross-sectional height. Table 1 provides general recommendations for profiles made of rubber or TPU with a hardness ≤ 95 shA. PTFE or other harder materials may require a smaller radial depth S or even open grooves. The recommendations in table 1 are not a substitute for careful installation tests in the particular application.

Installing rod seals in closed grooves

Rod seals can often be installed into closed grooves through carefully bending the profile similar to a kidney shape and then inserting it into the groove. It is very important to avoid sharp bending.
Thin and flexible profiles can be installed by hand (fig. 1 and fig. 2 ). Installation tools for TPU rod seals help to install profiles of greater section thickness (fig. 3, fig. 4, fig. 5, fig. 6, fig. 7 and fig. 8). After installation, the seal may need to be reshaped to a round form using a cone-shaped tool.
For PTFE seals, small diameter seals or for serial assembly, special assembly tools (fig. 9) may be required to save time or avoid seal damage. For additional information about such special installation tools, contact SKF.
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