TA TB SA SB Metal Case Hydraulic Oil Seals for Rotary Shafts

What Are the Differences Between TA, TB, SA, and SB Rotary Shaft Seals?

TA, TB, SA, and SB are common types of rotary shaft oil seals. Their main differences lie in the sealing lip configuration and metal case construction.

1. Comparison of TA, TB, SA, and SB Oil Seals

2. Key Differences Between Each Type

TB vs. SB

• TB: Features a primary sealing lip and an auxiliary dust lip to help prevent lubricant leakage and keep external contaminants out.
• SB: Uses a single primary sealing lip, mainly for retaining lubricants.
• Selection: TB is suitable when additional dust protection is required, while SB is commonly used in relatively clean operating environments.

TA vs. SA

• TA: Features a double metal case and two sealing lips.
• SA: Features a double metal case and a single sealing lip.
• Selection: The main difference is the auxiliary dust lip. TA provides additional protection against external contaminants.

TB vs. TA

• TB: Uses a single metal case with a double-lip design.
• TA: Uses a double metal case with a double-lip design.
• Selection: Both provide oil sealing and additional dust protection, while TA generally offers greater structural rigidity.

SB vs. SA

• SB: Uses a single metal case with a single-lip design.
• SA: Uses a double metal case with a single-lip design.
• Selection: Both are designed for primary oil sealing, while SA generally provides greater structural rigidity.

TA/TB/SA/SB OIL SEAL STRUCTURE COMPARE

3. Application and Selection Guide

4. Important Factors When Selecting Oil Seals

• Sealing Lip Configuration: Single-lip seals are primarily designed for lubricant retention, while double-lip seals provide an additional barrier against external contaminants.
• Metal Case Construction: Single and double metal cases differ in structural rigidity and installation suitability.
• Housing Requirements: Check the housing bore dimensions, roundness, and surface finish to ensure proper installation.
• Operating Conditions: Consider the sealing medium, operating temperature, shaft speed, pressure, and level of external contamination.

In summary: TB and SB differ mainly in their sealing lip configuration, as do TA and SA. TA and SA generally feature double metal case constructions, while TB and SB use single metal cases.

Technical Specifications – TA / TB / SA / SB Rotary Shaft Seals

JINNAI SEAL offers TA, TB, SA, and SB rotary shaft oil seals in various sizes and material options.

Product specifications can be customized according to equipment requirements, operating conditions, technical drawings or samples.

Available Model Configurations

Customization Support

Custom rotary shaft oil seals are available based on customer drawings, samples, or technical specifications. Please provide the shaft diameter, housing bore diameter, seal width, material requirements, and operating conditions for product selection and quotation.

Available Materials

How to Choose the Right Material

Customized Material Solutions

JINNAI SEAL supports customized rotary shaft oil seals based on application requirements. Material selection, hardness, dimensions, and sealing configurations can be adjusted according to customer drawings, samples, and operating conditions.

Contact our team for assistance in selecting the appropriate oil seal material for your equipment.

Key Performance Features

1. Reliable Oil Sealing

Designed to help prevent lubricant leakage around rotating shafts, supporting stable equipment operation and reducing lubricant loss.

2. Dust and Contaminant Protection

Double-lip configurations provide an additional barrier against dust, dirt, and external contaminants,

helping protect internal components.

3. Wear Resistance

Suitable rubber compounds help maintain sealing contact and resist wear during operation.

Actual performance depends on shaft surface finish, rotational speed, lubrication, and operating conditions.

4. Temperature Resistance

Different elastomer materials offer different temperature capabilities.

NBR is commonly selected for general oil-sealing applications, while FKM is often preferred for higher-temperature environments.

Actual temperature limits depend on the specific compound.

5. Material Selection for Different Media

Selecting the right elastomer is essential for compatibility with the operating medium.

JINNAI SEAL can assist with material selection based on lubricant type, chemical exposure,

temperature, and working environment.

Quality & Inspection

We apply strict quality control to every oil seal, from raw material to finished product. Incoming materials are tested for hardness, tensile strength, temperature and oil resistance. During production, curing temperature, mold dimensions and sealing-lip precision are monitored in real time. Before shipment, each batch passes dimensional measurement, visual inspection, leakage testing, and pressure and aging tests. With professional testing equipment, standardized procedures, ISO quality management and full batch traceability, every oil seal is accurate in size, tight at the lip and reliable in sealing—delivering consistent, dependable quality for our customers.

Packing & Payment & Shipping

• Package:We provide standard cartons, pallets and wooden cases. Custom packaging such as custom logo print is available upon request to protect goods well for different shipments.
• Payment Methods:Multi-currency settlement (CNY, USD, EUR, etc.). Multiple payment options including T/T, PayPal. Local bank transfer is available for some countries for faster transactions.
• Shipping Ways:We offer international express, air freight, sea freight and railway transport. You can also appoint your own forwarder for flexible delivery arrangements.

One-stop rubber seal service from reliable manufacturer

Equipped with automated production lines and in-house molding capability, we manufacture a full range of rubber sealing components in EPDM, NBR, FKM,FFKM,HNBR,PU,VMQ,SIL,PTFE ect. From standard parts to custom special-shaped components, each product is built to your specifications.

What We Produce:

• O-rings — standard series and custom sizes
• Rubber balls — solid rubber balls from 1mm to 500mm and custom support
• Gaskets, washers & flat seals — molded or die-cut
• Oil seals — rotary shaft and lip seals
• Custom special-shaped rubber seals — made to your drawing or sample