In terms of installation, hex head screw self-tapping can be used with a power tool or manual screwdriver
See here for more information and useful fitting tips.
Some disadvantages of NBR are poor ozone, sunlight and weather resistance as well as limited high temperature and flame resistance. For higher temperature resistance, a much better material to use is Silicone.
- Overall, the oil seal 12 22 5 is a crucial component in industrial machinery and automotive systems. Its ability to prevent oil leakage, maintain lubrication, and protect the equipment from external factors makes it indispensable for ensuring the smooth operation and longevity of the machinery.
Special exceptions still apply within the Volkswagen group. With PTFE oil seals, an aluminium or plastic housing is used in many different engine series. The Top Dead Centre (TDC) signal is no longer measured at the flywheel, but directly using a sensor on the rear crankshaft flange and integrated sensor in the oil seal. Special procedures and tools must be used for the disassembly and assembly of these parts.
- When it comes to maintaining the performance and longevity of your vehicle's engine, one critical component that often gets overlooked is the valve cover gasket. This small yet essential piece plays a crucial role in preventing oil leaks and ensuring that the engine runs smoothly. Over time, exposure to high temperatures and engine oil can cause the gasket to deteriorate, leading to leaks and potential damage to other engine components.
The care taken during the installation process will pay off by allowing the seal to work quietly and operate efficiently behind the scenes of your application.
Manufacturing and Quality Control
PTFE Oil Seals
There is a British Standard laid down for the control of synthetic rubbers. BS 3574 (1989) helps to determine shelf life – for instance, Nitrile (NBR) and Polyacrylic (ACM) are Group ‘B’ rubbers and have a 7-year life, whilst Silicone (VMQ) and Fluoroelastomers (Viton®) are Group ‘C’ rubbers and have a 10-year shelf life. PTFE and Leather do not come into this category but like the others should be kept in the original packing for as long as possible away from direct light, dust, and humidity. Ozone, which can also be produced by battery-driven forklift trucks has a very bad effect on synthetic rubbers. Finally, protect the sealing lip – DO NOT hang the seals on nails, wire etc.
With the help of tips and information from our suppliers, our specialists will be happy to explain how to install oil seals. Please read the instructions carefully before installation.
To install an oil seal properly, the shaft must be undamaged. This is so the oil seal can do its job properly on the one hand, and to prevent it from being damaged during fitting on the other. In addition, it is very important to lubricate the shaft, the sealing lip and the bore with plenty of grease. This will allow the oil seal to slide more easily over the shaft and prevent dry running after the first rotation. The oil seal may also come into contact with the keyway, thread or other grooves when sliding over the shaft. By taping or covering the shaft at the location of these irregularities with oil-soaked paper, the oil seal can be mounted without damage to the sealing lip.

oil seal types. Labyrinth seals are designed to provide a barrier to the leakage of oil by creating a tortuous path for the oil to flow through. V-ring seals, on the other hand, are designed to provide a more dynamic sealing solution by conforming to the shaft, thus preventing oil leakage.
The depth of the bonded seal can be less and the space between the bore and the outside diameter can be changed for ease of fitting. The bonding of rubber to metal is an important factor to be considered in the manufacture of such seals and should be considered carefully, since failure of the bond will cause the seal to fail. The metal case of the oil seal is usually made from mild steel of deep drawing quality which enables blanking, punching, stamping of the steel to the required dimensions.
Table 8: Housing design checklist
One of the key benefits of the 25x47x7 oil seal is its high level of resistance to wear and tear. This makes it an ideal choice for use in heavy-duty machinery and equipment that is subject to constant movement and pressure. The seal is able to withstand the rigors of daily use without degrading or failing, ensuring long-lasting performance and reliability.
Regular maintenance of the spark plug ignition coil is essential to ensure optimal engine performance. This includes checking for any signs of wear or damage, such as cracks in the casing or corrosion on the connectors. It is also important to replace the ignition coil as part of the recommended maintenance schedule to prevent any potential issues from arising.
Repeat with the ruler laid diagonally between the other two comers.
ERIKS type R (type A according to the DIN standard) is identical in shape to type M, but has a rubber outer case with metal reinforcement on the inside. The rubber creates a good seal in the housing, even if the housing has suffered minor damage or is not in its best condition for other reasons. The RST version has a dust lip. These types are often chosen to replace a type with a metal outer case because they are easier to install and can cope with minor damage to the groove, such as scratches.
EPDM