Rotary Shaft Seals

Rotary Shaft Seals

Rotary shaft seals (aka oil seals) are commonly low pressure seals designed to seal between a rotating shaft and body to prevent the loss of lubricating fluids and prevent the ingress of dirt and other contaminates. Besides o’rings, rotary shaft seals are some of the most common type of seals to be found on machinery. Often used as bearing seals, they can also be found in applications such as crank shaft seal on engines, output shaft seal on gearboxes and propeller shaft seal on boats. Some are designed to seal on the OD for applications with a rotating housing. And some designs can accommodate high pressures; up to 9.8bar (142psi) depending on seal type.
Sealing Australia stocks a wide range of rotary shaft seals and V-rings in various styles and compounds.

Rotary Profiles

Rotary shaft seals are available in many variations of profile (styles), the most common being the TC style. Most profiles feature a sealing lip pre-energised by a helical garter spring and all are available with or without a secondary non-spring loaded dust lip. Others have two spring loaded lips to seal between two mediums and some have no spring at all. There are profiles for automotive applications such as the bearing seals for trailers featuring Ford or Holden hubs. There’s profiles for high temperature and high pressure applications. Types for directional, bi-directional and non-directional rotation. There’s reinforced and non-reinforced structures. There are profiles that are completely enclosed with rubber and others with exposed metal on the periphery. There are so many different styles of rotary shaft seals out there, we cannot list them all. So if you cannot find the profile you’re after in the table below, give us a call as we can still give assistance.

See table below for various styles of rotary shaft seals.

Rotary shaft seal profiles

Type Profile Profile Profile Profile Profile
Type C

SC

TC

VC

KC

DC

Type B

SB

TB

VB

KB

DB

Type B

SB2

TB2

VB2

KB2

DB2

Type B

SBR

TBR

VBR

KBR

DBR

Type A

SA2

TA2

VA2

KA2

DA2

Type 3

TC3

TB3

TA3

KC3

KB3

Type 4

TC4

TB4

TCL

TC4L

TC4P

Type 4

DC4

DC4Y

DC4P

TC42-Rotary

TC40-Rotary

Type 5

SC5

TC5

VC5

KC5

DC5

Type 5

SB5

TB5

VB5

KB5

DB5

Type 6

SB6

TB6

VB6

KB6

Type 6

SA6

TA6

VA6

KA6

Type 7

TB7

TB7R

TC7

TC9

End Cover

EC

ECW

VK

VKW

Pressure Design

TCV

TCP

TCHP

TCN

Type W

SCW

TCW

VCW

KCW

Part Metal / Rubber

SBC

TBC

VBC

KBC

Part Metal / Rubber

SBCW

TBCW

VBCW

KBCW

Axile Seal

UA

UA+

UAO

UAO+

Agriculture Seal

QA

QLF

TCFY

TCFA

Type O External Sealing

OSC

OTC

OVC

OKC

Type O External Sealing

OSB

OTB

OVB

OKB

Type O External Sealing

OSA

OTA

OVA

OKA

V Rings

VA

VL

VS

 

Directional Helix Designs

Directional rotary shaft seals are seals designed to operate either single direction or bi-directional operation. The seals have a series of helical raised ridges on the sealing lip that when rotating, create a pumping action that reverses oil flow away from the sealing lip. As an added advantage the helix lips have less surface contact with the shaft, therefore have less friction and less wear giving longer lasting and more energy efficient seal.

See table below for helix lip designs.

Helix Designs

      Helix Design    
Bi-Directional

H0

H1

H2

H3

H4

Bi-Directional

H5

H6

H7

H8

H9

Bi-Directional

H10

H11

H12

H13

H14

Bi-Directional

H15

H16

Left Hand Rotation

L

L1

L2

L3

L4

Right Hand Rotation

R

R1

R2

R3

R4

 

For more information, quotation or assistance with rotary shaft seals, please contact us.