Technical Info » Oil Seal Design & Application
Oil Seal Design & Application Chart
NOK Type & Design | Applications | Features |
 | General purpose, non pressure fluid & severe grease sealing. (max. pressure 0.3 kg/cm²) | Lip: Having spring fitted seal lip. Most popular seal type. |
 | General purpose, non pressure fluid & severe grease sealing with light exclusion of foreign materials. (max. pressure 0.3 kg/cm²) | Lip: A combination of spring fitted seal lip and dust lip. If grease is applied between the sealing lip and dust lip, it can be used even lubeless when temporary condition occurs. |
 | Seals for construction machinery & vehicles. Also for heavy dust condition and preventing vacuum between lips in case of high speed shaft. | Lip: A combination of spring fitted seal lip and special synthetic fabric dust lip. With this special mat. Dust lip, it is able to provide ventilation dust proof & low abrasive characteristics. |
 | Economical design for grease & dust sealing no suitable for viscous fluid. | Lip: A spring-less seal lip. Can be used with S type or T type seal. |
 | Economical design for grease retention or sealing viscous fluid with light duty exclusion of dust or foreign materials. | Lip: A combination of spring-less seal lip and dust lip. If grease is applied between the seal lip & dust lip, it can be used even lubeless when temporary condition occurs. |
NOK Type & Design | Applications | Features |
 | Medium pressure seal for oil and water application. (max. pressure 3 kg/cm²). Not recommended for shaft size over Ø 63mm. | Lip: A combination of spring fitted seal lip & dust lip. The seal lip is designed to withstand pressure from deformation when pressure increased. |
 | High pressure seal for oil & water application. (max. pressure 10 kg/cm²) | Lip: A combination of spring fitted seal lip & dust lip with a reinforced metal casing to reduce deformation of the seal lip due to increased pressure. |
 | For reciprocal motion. Hydraulic or shock absorber seal. | Lip: A combination of spring fitted seal lip and dust lip. The seal lip is designed to prevent lip deformation due to reciprocal motion. |
 | Seals for engine, torque converter pump & washing machine. (max. pressure 1 kg/cm²). Suitable for high temp, high speed shaft, low torque and insufficient lubrication condition. | Lip: A combination of spring fitted seal & dust lip. The seal lip is coated with polytetraflouride ethylene resin. (NOK rarefron®) |
 | Medium pressure seal for liquid chemical, solvent and fuel oil. To substitute for normal rubber bonded seal, which is not suitable for these application (max. pressure 3 kg/cm²) | Lip: A combination of spring fitted seal lip. The seal lip mat. is made of polytetraflouride ethylene resin. (NOK rarefron®) |
NOK Type & Design | Applications | Features |
 | Splash seal for liquid chemical & fuel oil. Dust seal for high temperature without lubrication (max. pressure 1.0 kg/cm²) | Lip: Spring-less seal lip with one main sealing lip (VAJ) or two main lips in the same direction (KA31). The seal lip mat. is made of polytetraflouride ethylene resin. |
 | This seal is designed for sealing two different sealing fluids. (max. pressure 0.3 kg/cm²). This design can be substitute with 2 SB/SC type by installing back to back. | Lip: A combination of two springs fitted seal lip facing in the opposite direction. |
 | Outer sealing the shaft does not revolve but the housing rotate (max. pressure 0.3 kg/cm²) | Lip: The spring is fitted on the outer seal lip. Require good housing bore inner surface finish. |
 | This is attached to shaft and slides the seal lip on the terminal wall of the fixed end preventing leakage of grease an infiltration of water, dust and foreign object. | Lip: It is a single lip seal of rubber, and cross-section of a V shape. |
 | Used mainly as a light duty dust seal, grease seal for roller bearing plumber block. | Lip: The cross-section of this seal is almost like a Z shape, comprise of a simple rubber substance. ZF - single seal lip. ZT - seal lip with dust lip. |
NOK Type & Design | Applications | Features |
 | Mainly used for the roll neck of the rolling machine. It prevents entry of cooling water, oil and scale. (size not listed in this catalogue) | Lip: A combination of spring -less outer seal lip and dust lip, both lips facing the same direction. |
 | This seal is mainly used for automotive engine, differential gears & transmission. | Lip: Having spiral line all over the seal lip periphery. These spiral lines push back fluid likely to leak through the sealing portion due to pumping action. A clockwise or anti-clockwise spiral is available. |