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Figure 6: Oil seals for cars
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Sealing principle: Since there is an oil film controlled by the oil seal edge between the oil seal and the shaft, the oil film has fluid lubrication characteristics.
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Old School O-Rings
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- High abrasion resistance.
- The manufacturing process of a thick rubber gasket involves precision cutting or molding techniques. The rubber compound is first mixed with necessary additives to enhance specific properties like heat resistance or chemical stability. Then, it's formed into the desired shape and thickness using either a die-cutting method for simpler designs or a mold for complex geometries. Post-production, quality control measures ensure the gasket meets the stringent standards of the industry.
Oil seals come in various shapes to fit the machine or substance for sealing.
For this reason, when designing a machine, it is important to select the oil seal that is right for that machine.
Next time, we will explain the key points to consider when selecting your oil seal.
What are rotary shaft seals?
Type of Fluid
When selecting the oil seal that is right for your machine, it is important that the oil seal be appropriate for the requirements of the usage environment and that it be easily acquired for replacement.
In this month's column, How to select the right oil seal, we conveyed the following points:
1) Oil seal shape and material should be selected based on the housing, substance to be sealed, pressure, rotational speed, total eccentricity, and air-side conditions.
2) Oil seals can show good sealing performance in combination with properly designed shafts and housings.
3) Oil seal performance is affected by not only the type and material of the selected oil seal, but also a variety of other factors, such as operating conditions, total eccentricity, rotational speed, the substance to be sealed, and lubrication conditions. For this reason, diligent care is required in oil seal selection.

Rubber gaskets, commonly used in various industrial applications, serve the purpose of preventing oil leakage and maintaining the integrity of machinery by creating a barrier between two or more components.

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.
Put a wooden block or a piece of large tube against the seal and gently tap it squarely into the housing until it is fully home. Refit the timing cover, if removed.
Areas of application of this rubber are suggested by its outstanding temperature resistance (-55 °C to +200 °C), although this must not be applied to hot water or steam. Although silicone rubber almost matches NBR in oil resistance, it does not match the latter's physical and mechanical properties.
The oil seal would seal one face against a rotating member and the other face to a stationary housing. It would prevent dirt from coming between the hub or shaft and the seal.
Most ERIKS oil seals, such as the types M, MST, R and RST, are made of NBR as standard.
Various materials with unique properties are utilised in the construction of rotary shaft seals, allowing manufacturers to tailor the sealing solution to specific industry requirements and ensure optimal performance.
② Spring code
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.