Safety is paramount when working with hole cutters
- A PU oil seal is essentially a barrier that seals off mechanical parts, particularly those in contact with oils or other lubricants. The 'PU' in the term refers to polyurethane, a versatile material known for its high resilience, excellent abrasion resistance, and ability to withstand extreme temperatures. This makes it ideal for use in harsh operating conditions where conventional rubber seals may fail.
- Spark Plugs The Vital Connection in Your Car's Engine
- When shopping for new spark plugs, it's important to consider the type of spark plugs that are recommended for your specific vehicle. There are different types of spark plugs, such as copper, platinum, and iridium, each offering different levels of performance and durability. Your vehicle's owner's manual or a professional mechanic can help you determine which type of spark plugs are best suited for your car.
If the seal is being fitted to original equipment you may have some influence over the shaft and housing bore finish, but if you are replacing a worn seal you still need to take into account the condition of these 2 essential parts.
- resistance and processing oil, and the test results are also shown
Leather is probably the oldest of the lip materials still in common use, but the move towards mass production methods has seen a massive increase in the development of synthetic rubbers which lend themselves to accurate and repeatable injection and compression moulding. Nitrile (NBR) is still by far the most common elastomer for “normal” use, whilst Viton® (FKM/FPM) is rapidly replacing Polyacrylate (ACM) and Silicone (VMQ) for high-temperature applications. Viton® also has high resistance to abrasion and chemical attack making it a preferred elastomer. Recent developments in the use of PTFE for Rotary shaft seals has caused widespread interest particularly for high-speed shaft rotation or poor lubrication applications.
- Labor Cost

In this way, selecting the appropriate oil seal will lead to machine design that is economically superior!

oil valve cover gasket. It is important to ensure that the gasket is installed correctly and that the valve cover is tightened to the manufacturer's specifications to prevent leaks.
If you find a gap, measure it by sliding a feeler gauge under the ruler.
(4) The degree of eccentricity on the installation If the eccentricity of the oil seal and the shaft is too large, the sealing performance will be deteriorated, especially when the shaft speed is high. If the eccentricity is too large, a W-shaped oil seal can be used.
Oil seal installation
Based on the application of the oil seal, the outer skin layer tends to differ. Here are some types of the materials used for the outer skin of the oil seal.
