off-The-Shelf Skeleton Seal Oil Seal Nqk Tc 21X40X7 25X45X5 26X45X7 27X45X7 28X45X5 29X45X8 NBR Wear-Resistant Oil-Proof Engineering Machinery Oil Seal

Min.Order: 1

Product origin: Qingdao, Shandong, China

Infringement complaint:

Complaint

US$ 3 ~ 10

Description

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
Media		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	+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
Temperature range	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!

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off-The-Shelf Skeleton Seal Oil Seal Nqk Tc 21X40X7 25X45X5 26X45X7 27X45X7 28X45X5 29X45X8 NBR Wear-Resistant Oil-Proof Engineering Machinery Oil Seal

OEM/ODM High Quality PU/Rubber Oil Seal

Main Features

Shaft and Bore Configurations

Shaft Material

Shaft Tolerance

Configuration of the Bore

Bore Material

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