Outer case
The dimensions 40x52x7 denote the outer diameter, inner diameter, and thickness of the oil seal respectively. The first number, 40, refers to the outer diameter, which is the measurement from one side of the seal to the other when it's placed on the outer surface of the component it seals. The middle number, 52, signifies the inner diameter, the size of the shaft or housing bore it fits around. Lastly, the 7mm thickness contributes to the seal's durability and ability to withstand pressure.
Polyacrylate oil seals are a perfect compromise between quality and cost. They perform well with high temperatures and chemicals, but not as well as Viton oil seals. Polyacrylate has a temperature range of -25 degrees Fahrenheit to 300 degrees Fahrenheit. Due to their outstanding resistance to hot oil and oxidation, they are commonly used in automobile transmissions and hoses; however, they are also used for shaft seals, gaskets, and o-rings.
Seals with an auxiliary, contacting lip can also be filled with grease between the sealing lip and auxiliary lip to reduce frictional moment. This does not apply to silicone rubber seals and seals with hydrodynamic features, other than WAVE lip designs. also recommends using a hydraulic press, with suitable tools, to install a seal in its housing bore. Pressure should be applied as close as possible to the outside diameter of the seal.” Oil seals are commonly used in a variety of industries. Below are 5 types of oil seals used in today’s manufacturing and machinery industry.
Material Code ISO 1629
Moreover, the adaptability of NBR oil seals caters to the diverse demands of industry Applications of Metal-to-Oil Seals