Guide to oil seals for your application

Guide to oil seals for your application

When it comes to selecting oil seals, it's crucial to consider the type of material, application usage, and specific needs of your machinery—such as size, shape, and durability requirements. This helps to ensure leak-free operation and optimal performance in varying environments. In this comprehensive guide, we delve into the specifications, types, and materials of oil seals, and offer insights on choosing the right seal for your application.

The Ultimate Guide to Oil Seals

Oil seals play a pivotal role in numerous applications across diverse industrial sectors. Their primary function is to prevent the leakage of lubricants and to keep contaminants out. Selecting the appropriate oil seal is critical for ensuring efficient and reliable operation of machinery. In this guide, we will discuss various factors to consider for choosing the most suitable oil seal for your application.

For more agricultural machinery and equipment oil seals information, please contact us. We will provide professional answers.

Oil Seal Specifications

Oil seals are available in a multitude of designs, each serving specific applications. Radial shaft seals or lip seals are commonly used in dynamic applications, sealing rotating shafts. These seals generally consist of a metal outer case, a rubber or PTFE sealing lip, and a spring to maintain lip tension. While traditionally used for sealing lubricants, they also seal other fluids and solids.

• An outer case made of metal or rubber-coated metal.
• A rubber or PTFE sealing lip.
• A spring that provides necessary tension, varying by type.

Industries ranging from automotive to food processing utilize oil seals to maintain efficient machinery operation. Pumps, gearboxes, and wheels are some typical applications.

Choosing the Right Oil Seal

Selecting the appropriate oil seal depends on various factors, including the seal's size, material, and application type. Adequate knowledge about the working environment and specific requirements is essential for making the right choice.

Oil Seal Type or Shape

Oil seals are standardized according to DIN 3760 and ISO 6194. The most common types, such as ERIKS types R, RST, M, and MST, comply with these standards. Each seal type offers specific features suitable for different applications.

All standard types are fitted with springs to preload the sealing lip, making them suitable for low-pressure applications. Special types or PTFE lip seals are recommended for higher pressure scenarios.

ERIKS Seal Types

ERIKS type M, equivalent to type B according to DIN standards, features a metal casing with a rubber sealing lip. The metal casing needs a well-finished groove. This type is often used in original machinery due to cost advantages.
ERIKS type GV and GVST are heavy-duty with double metal cases, suitable for larger diameters.

ERIKS type R and RST have rubber outer cases with inner metal reinforcement, ensuring a seal even with minor housing damage. The GR and GRST types are similar but fully encased in rubber, making them ideal for acidic environments.

Oil Seal Material

Outer Case

• Metal: Typically carbon steel, although other steel types like stainless may be used upon request.
• Rubber or Rubber Fabric: Reinforced with fabric for strength and durability.

Spring

Standard springs are made of carbon steel, with stainless-steel options available for FKM and PTFE oil seals.

Sealing Lip

Made from rubber or synthetic materials, the choice of sealing lip material depends on the liquid type and rotational speed.

Common Materials

Nitrile Butadiene Rubber (NBR)

NBR is widely used due to its resistance to oils and greases, though it can be damaged by glycol-based products. Suitable for -35°C to 100°C.

Fluorine Rubber (FKM, Viton™)

Offers high resistance to heat and chemicals, but not suitable for glycol-based products. Works well up to 180°C.

Polytetrafluoroethylene (PTFE, Teflon®)

Excellent chemical resistance and low friction, suitable for -80°C to 200°C temperatures. Often used in the food and pharmaceutical industries.

EPDM

Used for solvent and steam applications, resistant to temperatures from -50°C to 150°C. Not common for oil seals.

VMQ (Silicone)

Suitable for a wide temperature range from -60°C to 200°C, but has poor wear resistance, making it less common for dynamic applications.

Oil Seal Size

Oil seals come in various sizes to fit different shaft diameters and groove dimensions. For instance, a seal described as 6x15x4 fits a 6-mm shaft diameter, 15-mm groove diameter, and 4-mm minimum groove width.

Oil Seal Installation

Correct installation is vital for oil seal effectiveness. Ensure the seal, shaft, and bore are clean and free from damage. Lubrication of the shaft and seal prevents dry running.

Preparation

Check for sharp points or burrs on the surfaces. The shaft must be prepared by lubricating to allow the seal to slide over easily, and covering the shaft during installation to prevent lip damage.

Fitting an Oil Seal

Correct orientation is crucial—place the seal so its spring points towards the medium to be sealed. Use appropriate tools to press the seal into the bore evenly.

For additional tips on installation, refer to this guide.

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Stijn de Cnop
Product Manager of Sealing & Polymer Technology

If you are looking for more details, kindly visit Industrial Oil Seal Manufacturing Company.

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45*72*13/20 Agriculture Machinery Oil Seal

Product Description

Product details

OEM:--
Type: Harvester oil seal, Agricultural Machinery oil seal
Use for: tractor

The tractor oil seal produced by NNK ensures quality and durability, utilizing the best rubber and maintaining optimal sealing performance. Providing wholesale prices, NNK tractor oil seals are a reliable choice for agricultural machinery.

Agricultural Machinery Oil Seal

Essential for the proper functioning of farming equipment, agricultural machinery oil seals prevent leakages and ensure optimal oil circulation. This extends machinery lifespan and minimizes downtime.

Functions and Features

High-Quality Material

Made from durable materials like rubber, silicone, or fluoroelastomer, these seals withstand the demands of agricultural environments.

Customizable Sizes and Designs

Available in various sizes, oil seals fit a wide range of machinery from small tractors to large harvesters.

Easy Installation and Replacement

User-friendly design ensures easy installation without specialized tools, allowing quick replacement when needed.

Superior Sealing Performance

Precisely engineered oil seals provide excellent sealing, withstand high pressures, and ensure optimal performance.

Cost-Effective Solution

Investing in high-quality oil seals reduces maintenance costs by preventing leaks and component damage, boosting machinery productivity.

Applications

Common applications include KUBOTA, JOHN DEERE, MASSEY FERGUSON, MITSUBISHI, NEW HOLLAND, YAMMER, NIPLO, SHIBAURA, KOBASHI, ISEKI, and FIAT machinery.

Description

Heavy-duty wheel and agricultural equipment seals are categorized into AP, CRS, and ST types, used in heavy-pollution environments like agricultural machinery, construction, and mining equipment. Featuring multi-lip designs for superior sealing, they prevent external dirt and grease leakage.

Hot Selling Model List

• AE0526A 14*28*7
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Why Use Agricultural Machine Oil Seal

Agricultural machinery operates in polluted environments. Without high-quality oil seals, contaminants can damage machinery components, reducing efficiency and lifespan. Specialist oil seals protect your equipment, ensuring longevity and optimal performance.

Why Use NNK Agricultural Machine Oil Seal

NNK oil seals by NOK-CN are designed for agricultural machinery, offering maximum sealing performance and reduced friction. These oil seals are ideal for tractors, conveyors, trucks, harvesters, engines, and other agricultural equipment with their robust double steel shell design.

FAQ

1. Why do more customers choose us?

• We specialize in high-quality seals manufacturing and exporting.
• We provide all types and specifications to meet one-stop shopping needs.
• We have a professional research and development team with advanced equipment.
• We offer a complete range of services from design to packaging.

2. What is your packing?

• Paper roller: 10pcs in one roller, 200 rollers in one carton
• PP bag: 50 or 100pcs in a bag, 15 or 30 bags in one carton
• Box: 1pc per box
• Customized packing upon request

3. Date of Delivery

• 1-2 days if in stock
• 10-15 days if out of stock with a mold
• 25-30 days if out of stock without a mold

4. Payment Terms

• 30% T/T in advance, 70% balance before shipment
• Western Union/Money Gram
• Paypal
• Others upon discussion

5. Can you produce according to the samples?

Yes, we accept both ODM and OEM. We can develop molds based on samples for production.

6. How do you maintain long-term and good relationships?

• We continuously improve process control and product quality to offer competitive prices for customer benefit.
• We treat every customer with sincerity, regardless of order volume, focusing on building long-term relationships.

Contact us to discuss your requirements of nbr rubber parts for sealing supplier china. Our experienced sales team can help you identify the options that best suit your needs.