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Oil Seals | Radial Shaft Seals

Oil seals, radial shaft seals or Simmerrings® have been designed for sealing shafts and spindles. Oil seals are one of the most frequently used rotary shaft seals. They separate oil or grease on the inside from dirt, dust and/or water on the outside. Most commonly, Oil-seals consist of a rubber sealing lip, a metal housing and a helical tensioned spring.

NewDealSeals supplies various types of oil seals, both with and without dust lip, in accordance with DIN3760/3761 and ISO 6194. Standard available in NBR/Steel and FKM/Stainless steel. Besides the standardised sizes, NewDealSeals also designs special and custom oil-seals.

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Brown Viton Oil Seals Four brown Oil Seals
Brown Viton Oil Seals
Four brown Oil Seals

Industrial Applications

  1. Power transmission
  2. Oil refineries
  3. Off-highway
  4. Manufacturing
  5. Automotive

How do Oil seals work?

Oil seal working principle

The common radial oil seals works by creating a thin layer of oil between the rubber sealing lip and the shaft which results in the oil lifting the sealing lip clear of the shaft. This thin layer of oil performs a barrier and prevents leakage of the oil past the sealing lip. For this reason rubber oil seals are not suitable for dry running applications or high pressure.

Technical Specifications

*Each type (profile) has a specific operating pressure and surface speed. Contact our experts for more info.

Movement type

Dynamic reciprocating, dynamic rotating

Surface speed

≤ 30 m/s

Pressure

≤ 5 bar (Most types <0.5 bar)

Temperature range

NBR:

-40° to +108° C

FKM:

-25° to +204° C

Available materials

Seal:

NBR, FKM, MVQ, ACM

Spring:

Carbon steel, Stainless steel

Housing:

Carbon steel, Stainless steel

Available standards

DIN3760 / 3761 and ISO 6194

Oil Seal Types | Profiles

Oil Seal profile A

Type A

Low pressure rotary shaft sealing

Type A according to DIN3760 is the most commonly used oil seal for low pressure radial sealing. The rubber covered housing provides good sealing capacity even with rough housing bores.

Oil Seal profile AS

Type AS

Low pressure rotary shaft sealing

Type AS according to DIN3760 is the second most commonly used oil seal for low pressure radial sealing. The rubber covered housing provides good sealing capacity even with rough housing bores. In addition to type A, the AS has an extra lip for excluding dust.

Oil Seal profile AO

Type AO

Low pressure light duty rotary shaft sealing

Type AO is the light/economical version of the most common type A oil seal. Suitable for light duty rotary shaft sealing. The rubber covered housing provides good sealing capacity even with rough housing bores.

Oil Seal profile AS-P

Type AS-P

Low pressure rotary shaft sealing.

In addition to type A, the AS-P has an extra lip for excluding dust and a reinforced sealing lip for pressures up to 2 BAR. The rubber covered housing provides good sealing capacity even with rough housing bores.

Oil Seal profile AS-PX

Type AS-PX

Low pressure rotary shaft sealing.

In addition to type A, the AS-PX has an extra lip for excluding dust and a metal reinforced sealing lip for pressures up to 5 BAR. The rubber covered housing provides good sealing capacity even with rough housing bores.

Oil Seal profile B

Type B

Low pressure rotary shaft sealing.

Type B has a steel/metal outer case. Not recommended in applications where housing bore roughness and tolerances are imperfect or where thermal expansion of the housing is expected.

Oil Seal profile BS

Type BS

Low pressure rotary shaft sealing.

Type BS has a steel/metal outer case. Not recommended in applications where housing bore roughness and tolerances are imperfect or where thermal expansion of the housing is expected. In addition to type B, this profile also has an extra lip to exclude dust.

Oil Seal profile BO

Type BO

Low pressure light duty rotary shaft sealing.

Type BO is the light/economical version of the B-type oil seal. Suitable for light duty rotary shaft sealing. The Type BO has a steel/metal outer case. Not recommended in applications where housing bore roughness and tolerances are imperfect or where thermal expansion of the housing is expected.

Oil Seal profile C

Type C

Low pressure rotary shaft sealing.

Type C has an extra steel/metal reinforced housing for improved structural stability. Not recommended in applications where housing bore roughness and tolerances are imperfect or where thermal expansion of the housing is expected.

Oil Seal profile CS

Type CS

Low pressure rotary shaft sealing.

Type CS has an extra steel/metal reinforced housing. In addition to type C, this profile also has an extra lip to exclude dust. Not recommended in applications where housing bore roughness and tolerances are imperfect or where thermal expansion of the housing is expected.

Oil Seal profile CO

Type CO

Low pressure light duty rotary shaft sealing.

Type CO is the light/economical version of the C-type oil seal. Suitable for light duty rotary shaft sealing. Type CO has an extra steel/metal reinforced housing. Not recommended in applications where housing bore roughness and tolerances are imperfect or where thermal expansion of the housing is expected.

Oil Seal profile A-DUO

Oil seal type A-DUO

Low pressure light duty rotary shaft sealing in dual fluids.

Type A-DUO is used for sealing dual fluids. The dual lips with garter springs prevent contamination/mixing between the two fluids.

Materials

Rubber Material Characteristics Performs well in Does not perform well in
NBR, XNBR, Nitrile
Krynac®, Nipol®

Temperature range:

-40° to +108° C

Abrasion resistance:

Tear/Wear resistance:

Relative Cost:

  • Water
  • Petroleum Oils & Fluids
  • Hydraulic Oils
  • Low temperatures
  • Ozone exposure
  • Acids
  • Solvents
FKM, Fluorocarbon
Viton®, DAI-EL®, Dyneon®, Tecnoflon®

Temperature range:

-25° to +204° C

Chemical resistance:

Ozone resistance:

Relative Cost:

  • High temperatures
  • Solvents
  • Petroleum oils
  • Most chemicals
  • Low temperatures
  • Applications including quick movements/direction changes after still stand due to the stick slip effect*.

*Stick slip effect: Rubber sticking to a surface when there is a transition from standstill to movement. Stick slip effect can cause damage to the rubber, causing leakage.

Contact Us

We believe in the quality of our products and service. Fill out the form and one of our skilled engineers will contact you within the next business day.

Contact details

  • +31 (0) 226 362 233
  • info@newdealseals.com
  • Energiestraat 2-5, 1749 DN Warmenhuizen, Nederland