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We provide top-notch seals and affordable oil seals solutions. This keep equipment running longer and cuts downtime losses.
We offer a wide range of oil seal products. Our lead times are short, and we provide different design solutions. This helps us adapt to both everyday and tough industry situations.
When choosing oil seals, it’s important to define the design type. Here are the key things to consider:
Standard sealing lip structure optimization
Our oil seals come in different lip designs. Choose one based on your application.
Some designs are simple and practical. Others are complex for special needs. Here are the standard lip shapes often used in the industry and what makes them unique:
1. Spring-loaded Single-Lip Type
Core Configuration: Built-in spring ring, simple structure.
Applicable scenarios: low-pressure conditions focused on sealing internal media.
Precautions: Not recommended for environments containing dust or contaminants.
2. Spring-loaded Double-lip Type (Main and Auxiliary Lips)
Core Configuration: Spring with main lip + auxiliary lip (secondary lip).
Applicable Scenarios:
Low-pressure conditions.
The main lip seals the internal medium.
The auxiliary lip keeps out dust and dirt.
3. Spring-loaded Double-lip Type (Double-Diaphragm Type)
Core Configuration: Spring ring + two identical lip-shaped diaphragms.
Applicable Scenarios: Conditions requiring the separation of two liquids.
Usage Requirements: Fill in lubricant, such as grease, between the two diaphragms.
4. Springless Single-Lip Type
Core Configuration: Springless design, simple structure.
Applicable Scenarios: Non-pressure medium sealing, such as grease sealing or dust protection.
5. Springless Double-Lip Type
Core Configuration: Springless design, double-lip structure.
Applicable Scenarios:
Non-pressure medium sealing (like grease).
Dust prevention
Isolation of internal and external media
Standard sealed box structure design
1. Type A (Metal Housing + Reinforcing Inner Liner)
Core Structure: A metal housing with a strong inner lining boosts structural strength.
Suitable Scenarios:
Applications with shaft diameters over 150mm.
Small shafts need extra strength.
Uses involving special rubber formulations.
2. Type B (Pure Metal Housing)
Core Structure: Metal housing; inner casing made of steel or cast iron.
Core Advantage: Achieves a robust and precise seal within the housing.
Precautions: May limit static sealing performance at the outer diameter (OD).
Suitable Scenarios: Applications with shaft diameters of less than 150 mm.
3. Type C (Rubber-Wrapped Metal Housing)
Core Structure: A metal housing with a rubber layer on top. It fits full-size shafts.
Core Advantage: The rubber layer stops metal from rusting and corroding. It also protects against damage during assembly.
Suitable Scenarios:
Equipment with soft alloy or plastic housing materials.
Replacement situations when the housing surface shows minor damage.
Upgrade of metal casing surface treatment technology.
Oil seals with metal casings can have their outer edges treated or machined. They prevent rust, make defects easy to spot, and seal scratches inside the bore. Common outer edge treatments for metal outer diameter oil seals are as follows:
1. Original Color Treatment: The surface gets a yellow-green adhesive. This is the basic treatment.
2. Different colors help in the rapid identification of product models or specifications.
3. Grinding and polishing make the outer edge smoother. This improves the fit and sealing performance with the casing bore.
Oil seal common type selection.
You can mix different lip designs and housing types. This helps you create various globally compatible O-rings and seals (GORs).
SC type: Single lip with spring + rubber-coated outer diameter
TC type: Double lip with spring + rubber-coated outer diameter
SB type: Single lip with spring + metal outer diameter
TB type: Double lip with spring + metal outer diameter
SA type: Single lip with spring + reinforced metal outer diameter
TA type: Double lip with spring + reinforced metal outer diameter
Oil seal selection factors
Our oil seals are available in both imperial and metric sizes. When choosing a seal, define these core parameters and requirements with precision.
Product Type: Determined by the combination of lip design and housing type (e.g., SC type, TC type, etc.).
Shaft Diameter: This is the outer diameter of the shaft where the seal fits. People also call it the inner diameter of the oil seal.
Bore Diameter: This is the inner diameter of the housing bore where the seal goes. People also call it the oil seal’s outer diameter.
Width (or Depth): The depth of the housing bore, corresponding to the width or height of the seal. Note: If the application doesn’t need a specific seal width, leave enough depth in the bore. This way, you can replace it with a wider seal later without difficulty.
Sealing Lip Material: We need a clear definition of the material for the sealing lip.
Special Materials/Requirements:Use stainless steel for the housing or spring.
Special Treatments/Surface Finishes: More processing requirements, such as painting, edge polishing, etc.
KODAO Rings and Seals Company Oil Seal Design
Koda O-Ring and Seal provides a full range of oil seals in standard sizes. If you’re a distributor or buyer needing oil seals, contact us now. You can talk to a technical sales rep in person and get a free quote.
