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HANDLING AND ASSEMBLY OF SIMMERRING
Preventing the Simmerring, particularly the sealing lip, from contact with sharp edges and any kind of contamination is essential during handling and installation.
The list of possible problems is intended to be of use to the user when handling and fitting Simmerring so that the user can recognize problems and take remedial action in the following areas → Technical Manual – Handling of defects, page 68.
Receipt of goods
■ Storage
■ Transport
■ Temporary storage at assembly station ■ Preparation for installation
■ Assembly station
■ Contact surface of the Simmerring
■ Housing bore
■ Handling of assemblies.
Handling
Numerous possible problems have causes that can easily be avoided by some simple steps. In practice, however, the care required during handling is frequently neglected. Some examples from the comprehensive list of issues are:
■ Pay attention to damaged packaging
■ Leave seals in packaging as long as possible until
installation
■ Do not leave seals lying around loose
■ Protect seals from dust and dirt
■ Safeguard seals in a sealed or covered state
■ Only use clean grease or oil
■ Avoid excessive greasing
■ Do not bring sealing edge into contact with a sharp
edge or with a damaged installation tool
■ Avoid metal chips
■ Sharp-edged chamfers on the shaft and bore are not
permitted
■ Damage and corrosion of shaft and bore are not
permitted
■ Pay attention to alignment of bore and shaft.
Positioning of the seal
For most uses only one single seal is necessary. For positioning of vertical or inclined shafts, the installation of two seals, one behind the other in the same installed direction, is recommended for seals that lie below the oil level.
The space between the seals is to be used as a lubrication chamber. It is recommended to make provision for re-greasing.
The Simmerring can only fulfill sealing tasks and is not suitable as a guide for machine components or for the transmission of axial forces.
The Simmerring and accompanying shaft contact surface are greased before fitting in order to ensure lubrication for the initial revolutions of the shaft.
Excessively high pressure must not be permitted to build up in the unit. A pressure that is too high shortens the service life. The housing is to be ventilated if there is not sufficient room available for expansion.
3
Fig. 8 Installation with hydraulic or pneumatic assembly press. Diameter of metal tool face 5 mm to 10 mm (0.2 in to 0.4 in) larger than seal outside diameter (d2)
Fig. 9 Installation from the back side. Outside diameter of the pilot shaft approx. 0,5 mm (0.02 in) smaller than the inner lining diameter of the seal. Please inquire if necessary.
Fig. 10 Inclined installation not permissible WRONG!
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