Rotary Shaft Seals

Shaft Seals prevent leakage along rotating shafts or keep dirt, dust and water outside. The category includes oil seals, V-rings, Alphaseal shaft seals and other dynamic sealing products used around a shaft.

A shaft seal forms a barrier between a rotating shaft and its stationary surroundings. An oil seal retains lubricant inside the machine and keeps contamination outside. V-rings and Alphaseal shaft seals are used where the main function is to exclude dirt or water.

Shaft seals are used on rotating shafts in industrial machinery. Oil seals are the standard solution in many applications. The range also includes V-rings and energised PTFE seals within dynamic sealing; hydraulic seals remain outside this category.

Select shaft seals according to what must be retained or excluded, the type of rotary application and the available installation position. Check shaft diameter, rotational speed and operating conditions. Choose an oil seal to retain lubricant, or a V-ring or Alphaseal type where dirt or water must be kept outside.

Key attributes are seal type, medium to retain or exclude, shaft diameter, rotational speed, installation position and operating conditions.

Frequently asked questions

Select an oil seal where a rotating shaft must be sealed and lubricant must remain inside the machine. The oil seal also helps keep contamination outside and is the usual shaft seal for many standard applications.

Use a V-ring where the primary purpose is to keep dirt or water away from the rotating shaft. V-rings and Alphaseal shaft seals provide this protective function around rotating shafts.

An Alphaseal shaft seal is used to keep dirt or water outside in an application with a rotating shaft. Select this type according to the protective function, shaft size and available installation position.

First establish which medium must be retained or excluded. Then check the type of rotary application, shaft diameter, rotational speed, installation position and operating conditions before selecting a shaft seal.