Radial Shaft Seals
What are radial shaft seals?
Radial oil seals, also known as Rotary Shaft Seals, serve the purpose of sealing spaces between mechanical components, maintaining lubricants inside and preventing contaminants from getting in.
A seal has three main components: the sealing lip, the metal structure, and the spring.
Components:
- The lip of the seal consists of a flexible membrane made of elastomeric material, ending at an edge.
- The metal structure is designed to provide the necessary stiffness for a necessary coupling with the housing.
- The spring acts as a complement to the lip, helping to compensate for the wear and tear of the elastomeric material.
Common materials include FKM, ACM, NBR, and HNBR. To withstand wear, the durometer (hardness) of the compounds is typically from 70 to 85 Shore A.
See below standard seals that YEI Shien manufactures (click on the rectangles for more information):
KA
Characteristics:
Non-pressure double lips and internal metal structure for greater rigidity.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
KB
Characteristics:
Non-pressure double lips, easy installation with lead-in chamfer.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
KC
Characteristics:
Non-pressure double lips and external surface covered with rubber for protection and stability.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
KF2
Characteristics:
Rubber covered both on the outside and inner case.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
KM
Characteristics:
Precisioun ground O.D with led-in chamfer with an additional inner rubber lining.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
SA
Characteristics:
Low pressure single lip with an additional internal metal structure for greater rigidity.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
SB
Characteristics:
Machined metal outer rim with spring. Recommended for heavy industries (cranes, reducers for rollers).
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
SC
Rubber covered external diameter for protection and stability.
Works best for industrial transmission, shafts with medium or lower degrees of external contaminants, and power tools in general.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
SC3
Rubber covered external diameter for protection and stability, internal surface not covered.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
SG
Characteristics:
Specially designed corrugated outside diameter. Particularly suitable for applications where the housing material is subject to large thermal expansion, i.e. aluminum housing.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
SM
Characteristics:
Spring-loaded single lip for oil or grease retention. Suitable for Electric motors, gearboxes, pumps, fans, run-out tables, paper rolls, mixers and custom equipments.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
TA
Double lips seal with an additional internal metal structure for greater rigidity. Suitable for industrial transmissions, shafts (only with medium or lower degrees of contamination) and power tools.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
TA46
Special variation with additional internal metal structure for greater rigidity. Suitable for industrial transmissions, shafts (only with medium or lower degrees of contamination) and power tools.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
TB
Double-lips seal with machined external metal structure.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
TC
Double lip, internal surface covered in rubber.
TC3
Variation of TC. External surface covered with rubber to improve the protection and stability. No rubber cover on the internal surface.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
VM
Characteristics:
Precision ground O.D. with a lead-in chamfer to help ease the installation. This seal type offers an additional rubber lining that fully protects the inner case from rusting or corroding which could contaminate the sealed media.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
VA
Non-pressure single lip with a metal reinforcement. Suitable for large diameters and for providing sealing for high viscosity fluids.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
VB
Non-pressure single lip and precision ground metal OD with a lead-in chamfer for ease of installation.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
VC
Non-pressure single lip with internal, external surface covered with rubber to improve the protection and stability.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
VG
Single lip and corrugated O.D for applications where the housing material is subject to a large thermal expansion or press fitting into a housing where installation is usually difficult.
We manufacture both commonly used sizes and more special sizes. Contact us for more information.
Looking for profiles not included above?
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