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OEM/ODM High Quality PU/Rubber Oil Seal

Brief Introduction

 
Oil seal is often called grease, fluid, dirt or lip seals. Oil seal is an integral part in any rotating and moving part assembly. They close spaces between stationary and moving components in mechanical equipment. In most applications, the seal is either partially or temporarily immersed or is simply exposed to splashing lubricant, particularly in engines, transmissions, gearboxes or axles.
 
They are vital components of almost every type of machine and vehicle in operation. An oil seal normally consists of three basic components: The Sealing Element (the nitrile rubber part), the Metal Case, and the Spring. It is a widely used sealing component. The function of a seal is to prevent the leakage of medium along the moving parts. This is mainly achieved by the sealing element.

Technical data

Temperature: -40°C / +200°C Depending On Material
Pressure: Up to 0.05 MPa
Speed: up to 25 m/s
Medias: mineral oils, water, lubricating grease
Rubber: NBR/FKM/HNBR/PU/fabric rubber
Spring: Carton Steel/stainless steel
Oil seal Cross Reference
 

Main Features

 
Sealing ring is used, in case of adequate lubrication by the medium to be sealed, preferably where shafts pass through walls in mills and large gearboxes in heavy machinery manufacture.

Particularly robust static part
Lasting radial contact pressure
Highly wear-resistant
The seals conform to DIN 3760. Rubber types available are Nitrile, FKM, Silicone and EPDM.
The seals are used in a full range of equipment in the following industries:
• Automotive.
• Manufacturing.
• Off-highway.
• Oil refineries.
• Power transmission.

Example applications include:
• Industrial Pumps.
• Electric Motors.
• Compressors & Vacuum Pumps.
• Engine Seals.
• Agricultural Machinery Seals.
• Domestic Appliances
 

Fitting & installation:

To provide effective sealing, radial shaft seals must be installed properly. An experienced installer with suitable tools, working in a clean environment, is recommended to provide proper installation.

To facilitate seal installation and to achieve initial lubrication, prior to installation, Morgan recommends wiping the shaft and seal with the lubricant that is going to be retained. While the outside diameter of metal-cased seals can be lightly lubricated to ease installation, the outside diameter of rubber covered seals should always be lubricated.

Seals with an auxiliary, contacting lip can also be filled with grease between the sealing lip and auxiliary lip to reduce frictional moment. This does not apply to silicone rubber seals and seals with hydrodynamic features.
 

Lip Material

It is very important to take into account the environment in which the seal will operate when you are selecting the sealing element material. The most important factors are temperature, medium being sealed, pressure, and shaft speed.
 

Media

Maximum temperature, depending on the materials

ACM

AEM

EPDM

FKM

HNBR

NBR

VMQ

Mineral oils

Oils for motors

+130°C

+130°C

-

+170°C

+130°C

+100°C

+150°C

Oils for gearboxes

+120°C

+130°C

-

+150°C

+110°C

+80°C

+130°C

Oils for hypoid gears

+120°C

+130°C

-

+150°C

+110°C

+80°C

-

ATF oils

+120°C

+130°C

-

+170°C

+130°C

+100°C

-

Hydraulic oils

+120°C

+130°C

 

+150°C

+130°C

+90°C

-

Greases

-

+130°C

-

-

+100°C

+90°C

-

Fire-resistant
fluids

HFA group-Emulsion with more than 80% water

-

-

-

-

+70°C

+70°C

+60°C

HFB group-Opposite solution(water in oil)

-

-

-

-

+70°C

+70°C

+60°C

HFC group - Polymer aqueous solution

-

-

+60°C

-

+70°C

+70°C

-

HFD group - Water-free synthetic fluids

-

-

-

+150°C

-

-

-

Other fluids

EL + L heating oil

-

-

-

-

+100°C

Contact us to discuss your requirements of o ring vs gasket. Our experienced sales team can help you identify the options that best suit your needs.

+90°C

-

Air

+150°C

+150°C

+150°C

+200°C

+130°C

+90°C

+200°C

Water

-

-

+150°C

+100°C

+100°C

+90°C

-

Water for washing

-

-

+130°C

+100°C

+100°C

+100°C

-

Temperature range

Min.

-25°C

-40°C

-45°C

-20°C

-30°C

-30°C

-60°C

Max.

+150°C

+150°C

+150°C

+200°C

+150°C

+100°C

+200°C

 

Shaft and Bore Configurations

 

Shaft Material

 
Seals perform best on medium carbon steel or stainless steel shaft. Heat treatment or nitriding is especially recommended. To seal water at low surface velocities, stainless steel is more suitable.

The minimum hardness on the area where the sealing lip contacts the shaft should be 45 HRC. Where lubrications is doubtful, abrasive matter is present, or shaft speed is greater than 4m/sec, 55 HRC is preferred.

The shaft must be machined to the surface Roughness of Rt=1 to 4 micrometers (Ra=0.2 to 0.8 micrometers). In the areas of the contact surface, any rifling marks are not permitted.
 

Shaft Tolerance

 

Nominal Shaft Diameter

Tolerance

up to 4.000

+/- 0.003

over 4.000 to 6.000

+/- 0.004

over 6.000 to 10.000

+/- 0.005

over 10.000

+/- 0.006

 

Shaft Material and Hardness

 

 

Condition

Material

Hardness

General

Carbon steel(Heat treatment/nitriding is recommended)

45HRC min.

For sealing water with low surface velocity

Stainless steel

55HRC min.

 

Configuration of the Bore

 
The leading corner of the bore should be chamfered and free of burrs. The inside corner of the bore should have a maximum radius of 0.047". The tolerances for the bore are shown below.
 

Bore Tolerance in inches

 

Bore Diameter

Bore Tolerance

up to 3.000

+/- 0.001

3.001 to 6.000

+/- 0.0015

6.001 to 10.000

+/- 0.002

10.001 to 20.000

+/- 0.002/- 0.004

20.001 to 40.000

+/- 0.002/- 0.006

40.001 to 60.000

+/- 0.002/- 0.010

Bore Material

Steel and cast iron provide a good surface for both rubber O.D. and metal O.D. seals. For soft alloy (aluminum) bore, seals with rubber O.D. provide better sealing capacity than metal O.D.

The table below shows the recommended maximum bore roughness.
 

Bore I.D. Roughness

Maximum Roughness

Metal O.D.

10 microinches Ra
2.50 microinches Ra

Rubber covered O.D.

150 microinches Ra
3.75 microinches Ra

Our Company







As a comprehensive industrial enterprise that integrates R & D and sales services, with over 20 years' experience, especially the guaranteed supplier of China Manufacturing Network, our factory covers an area of 10,000 square meters, which enables very quick delivery.
 
Owning the most advanced CNC automatic production line, automatic assembly line, and a varied of testing equipment, our bearings mainly cover SKF, NSK, NTN, KOYO, TIMKEN, NACHI, THK etc., which meets all low noise, low vibration, low friction, high precision, high sealed, high turning speed and long life requests.
 
 

Exhibition:

 

FAQ
 
SAMPLES

1.Samples quantity: 1-10 pcs are available.
2.Free samples: It depends on the model NO., material and quantity. Some of the bearings samples need client to pay   samples charge and shipping cost.
3. It's better to start your order with Trade Assurance to get full protection for your samples order.

CUSTOMIZED

The customized LOGO or drawing is acceptable for us.

MOQ

1.MOQ: 10 pcs mix different standard bearings.
2.MOQ:  5000 pcs customized your brand bearings.

OEM POLICY

1.We can printing your brand (logo,artwork)on the shield or laser engraving your brand on the shield.
2.We can custom your packaging according to your design
3.All copyright own by clients and we promised don't disclose any info.

SUPPORT

Please visit our 1Sagain bearings website, we strongly encourage that you can communicate with us through email, thanks! 

As a comprehensive industrial enterprise that integrates R & D and sales services, with over 20 years' experience, especially the guaranteed supplier of China Manufacturing Network, our factory covers an area of 10,000 square meters, which enables very quick delivery.Owning the most advanced CNC automatic production line, automatic assembly line, and a varied of testing equipment, our bearings mainly cover SKF, NSK, NTN, KOYO, TIMKEN, NACHI, THK etc., which meets all low noise, low vibration, low friction, high precision, high sealed, high turning speed and long life requests.1.Samples quantity:pcs are available.2.Free samples: It depends on the model NO., material and quantity. Some of the bearings samples need client to pay samples charge and shipping cost.3. It's better to start your order with Trade Assurance to get full protection for your samples order.The customized LOGO or drawing is acceptable for us.1.MOQ: 10 pcs mix different standard bearings.2.MOQ: 5000 pcs customized your brand bearings.1.We can printing your brand (logo,artwork)on the shield or laser engraving your brand on the shield.2.We can custom your packaging according to your design3.All copyright own by clients and we promised don't disclose any info.Please visit our 1Sagain bearings website, we strongly encourage that you can communicate with us through email, thanks!

If you are looking for more details, kindly visit oring vs gasket.