- In conclusion, the humble 12x22x5 oil seal might appear as a mere afterthought in the grand scheme of mechanical design. However, its significance cannot be overstated—it stands as a testament to the idea that even the smallest components can have the most profound impact on an engine's health and longevity. With a mere 5% tolerance rate, it epitomizes the engineering principle that precision equals perfection. As engineers continue to push the boundaries of what machines can do, components like the 12x22x5 oil seal will remain silent guardians, ensuring that the heart of those machines continues to beat strongly and efficiently.
Metal cased design
An oil seal normally consists of three basic components: the sealing element, the metal case and the spring. The purpose of the sealing element is to stop the fluid from leaking between the shaft and housing. The metal case will give rigidity and strength to the seal while it is being held in the bore or recessed groove. The garter spring ensures constant pressure and maintains the radial force to the shaft, flattening the sealing edge to a defined width. The garter spring maintains the radial force exerted by the sealing lip around the shaft surface. All materials must be selected depending on the environment in which the oil seal will function.

Silicone
Replace the sump drain plug tightly and refill the engine with the right amount and grade of oil.
Maintenance and Replacement of Gaskets
Oil or other seals can be used for grease and oil seals. A flexible lip, radial lip, or rotating shaft seal are different names for an oil seal. Single lip, double lip, triple lip, and four or more lips are frequent configurations. Double dust lip seal A seal with a garter spring design is the Double Dust Lip (DDL) seal. It has two dust lips, as the name would imply, plus a fluid lip with a garter spring to keep the lip firmly attached to the wear ring. Given the ongoing evolution of bearing seal designs, this seal would be considered a starting seal. For more than 50 years, this design has been the workhorse of the freight business; it still is in some regions. NBC Brenco Bearing Seal performs the fundamental task of keeping contaminants and grease out. Because of the garter spring, this seal would add the most torque and temperature to the bearing. Efficiency plus bearing seals Due to eliminating the fluid lip using poly inserts and rotors, the Efficiency Plus (EP) seal has a reduced torque value of fewer than 15 in-lbs. Although it features a triple dust lip rather than a double dust lip, the dust lip is still a molded component of the design. A labyrinth-like insert and rotor interlock each other to replace the fluid lip. NBC Brenco labyrinth provides excellent grease while lowering the torque required to rotate the seal. Other types of oil seal and grease seals include:
For a more detailed discussion of seal types and type codes, please see the following:
MAKING THE CHOICE OF AN OIL SEAL VS. MECHANICAL SEAL

1) Seal type

What are Oil Seals – A guide to Oil and Rotary Shaft Seals
The dimensions of the 25x47x7 oil seal refer to its inner diameter, outer diameter, and thickness, respectively. These measurements are important in ensuring a proper fit for the seal in the machine or engine it is intended for. By providing a secure seal between moving parts, the oil seal helps to maintain proper lubrication in the machine and prevent the loss of oil.