Figure 5 explains the JTEKT seal numbering system.
Seal numbers consist of
(1) the seal type code,
(2) the spring code,
(3) the lip type code,
(4) the dimensional numbers, and
(5) the special type code,
and Table 6 shows examples of each of these codes/numbers.
What is an Oil Seal?
In conclusion, oil seals are essential components in machinery and equipment that play a critical role in preventing oil leaks and ensuring smooth operation. The 65x90x10 oil seal, with its specific size and design, offers reliable sealing performance for a wide range of applications. By selecting the right size, material, and design, and following proper installation and maintenance procedures, operators can effectively protect their equipment and prolong its service life.

Material: There are several material options. Nitrile (Blank), Viton (V), Silicone (S), EPDM (E), Carboxylated Nitrile (X), HNBR (H), Polyacrylate (P), and Teflon (T).
Oil seals are used in a great many devices for steel production equipment.
Figure 7 shows the places where each seal type is used in a rolling mill.


* KOYO is a registered trademark of JTEKT.
A shaft’s surface finishing will determine how effective the sealing will be. The spiral lead and the direction of the finish tool marks have an impact on the sealing effectiveness. Therefore, it’s imperative to ensure that the shaft surface finishing is maintained.
B) Housing-bore eccentricity
As shown in Figure 9, housing-bore eccentricity is defined as being twice the eccentricity between the housing-bore center and shaft rotation center.
In addition to their reliability and durability, floating oil seals are also easy to install and maintain
. These seals do not require complex installation procedures or special tools, making them a cost-effective solution for businesses looking to minimize downtime and reduce maintenance costs. With proper care and regular inspection, floating oil seals can continue to provide effective sealing performance for years to come.When choosing seal materials, it is critical to evaluate the environment and application. Common seal materials include: