- In engines, for instance, high pressure oil seals are crucial for maintaining proper lubrication and preventing oil leaks. They protect the crankshaft and other rotating components from contact with engine oil, ensuring optimal performance and longevity. In hydraulic systems, they prevent fluid loss, minimizing energy consumption and environmental pollution.
Type B Oil seals
As shown in Figure 1, sealing devices come in two types: contact and non-contact.
Oil seals are among the major contact type sealing devices.
• Compact design
A wide range of sealing devices are used in various machines.
Sealing devices serve the following functions:



Oil seals are used in a great many machines.
What are Oil Seals – A guide to Oil and Rotary Shaft Seals

1) Oil seals for cars
For more detailed information, please see the following:
Names and functions of seal components
What are Oil Seals and how do they work?
Runout must be kept to a minimum. Movement of the center of rotation is usually caused by bearing wobble or shaft whip. When coupled with misalignment, this problem is compounded. Contrary to popular belief and common practice, the installation of flexible couplings cannot correct or compensate for misalignment.
An overview of the different standard types of oil seals and their main characteristics is shown below.
As an example, this oil seal has a part number that corresponds to a Shaft Size of 3”, a Bore Size of 4”, a Width Size of 0.625”, a Style of TB2, and is made of Viton material. Conversely, the same size oil seal in Metric has a Shaft Size of 76.20 mm, a Bore Size of 101.60 mm, and a Width Size of 15.88 mm.
Sealing edge This refers to the component of the oil seal that makes contact with the shaft.
It is wedge-shaped to be pressed against the shaft surface and makes contact with the shaft to ensure sufficient sealing performance and suitability for operation at high peripheral speed.
The Ultimate Guide to Oil Seals
It is essential to regularly check and replace spark plugs as needed to ensure the engine runs smoothly and efficiently. Over time, spark plugs can wear out due to the intense heat and pressure inside the engine cylinders. Worn-out spark plugs can lead to misfires, poor fuel economy, and even engine damage if left unattended.