Rotary Shaft Seal 68x90x12 NBR TC Double Lip Oil Seal

Applications

The 68x90x12 NBR TC Double Lip Rotary Shaft Seal is a precision-engineered oil seal designed to protect rotating shafts and housings from oil leaks, contamination, and wear. It is one of the most widely used technical seals in industrial and automotive machinery, where reliability and long service life are essential.

Manufactured from high-quality NBR (nitrile butadiene rubber), this rotary seal offers excellent resistance to oils, greases, fuels, and moderate temperature fluctuations. The TC design - featuring a double lip with an external metal case and garter spring - ensures effective sealing in dynamic applications, reducing friction and wear.

Typical applications include:

• Industrial machinery: pumps, compressors, gearboxes, motors

• Automotive systems: crankshafts, wheel hubs, drive shafts, axles

• Hydraulic equipment: cylinders, actuators, transmission systems

Advantages

• Double Lip Design (TC Type): Provides dual protection — the primary lip retains lubrication, while the secondary lip prevents the ingress of dust and contaminants.

• High Durability: NBR compound offers long-term resistance to oils, greases, and mechanical wear.

• Precise Fit: The 68x90x12 mm dimensions ensure a secure and stable fit for rotary shafts and housings, reducing leakage risk.

• Universal Use: Suitable for both industrial and automotive applications, including OEM replacements.

• Cost Efficiency: Extends component service life and minimizes downtime by preventing lubricant loss and contamination.

Technical Data

• Type: Rotary Shaft Seal - TC (Double Lip, Metal Case, Spring Loaded)

• Material: NBR (Nitrile Butadiene Rubber)

• Inner Diameter (ID): 68 mm

• Outer Diameter (OD): 90 mm

• Width (W): 12 mm

• Temperature Range: -40°C to +100°C (intermittent up to +120°C)

• Applications: Oil and grease sealing in rotary shafts and housings

• Resistance: Oils, greases, water, and mild chemicals

Why Choose This Oil Seal?

The 68x90x12 NBR TC Double Lip Oil Seal is designed for performance and reliability. Its dual-lip construction ensures protection from both lubricant leakage and external contamination — crucial for extending the lifespan of rotating components. The NBR material guarantees flexibility, durability, and resistance to most industrial lubricants, making it the preferred choice for B2B buyers across multiple industries.

Whether you’re maintaining drive systems, hydraulic assemblies, or industrial gearboxes, this shaft sealing ring delivers consistent performance under demanding operational conditions.

FAQ

Q1: What does TC mean in oil seals?
A1: TC indicates a double lip seal with a metal outer case and a tension spring. The main lip retains oil, while the secondary lip acts as a dust seal.

Q2: What are the advantages of NBR material?
A2: NBR offers high resistance to oils, greases, and fuels, along with good elasticity and wear resistance, making it ideal for rotary sealing applications.

Q3: How do I select the correct shaft seal size?
A3: Match the inner diameter to the shaft, the outer diameter to the housing bore, and the width to the available space. In this case: 68x90x12 mm.

Q4: What’s the difference between single and double lip seals?
A4: Single lip seals retain lubricants but don’t block contaminants. Double lip seals add a dust lip, providing both internal and external protection.

Q5: Can this seal be used in automotive systems?
A5: Yes. This model is commonly used in crankshafts, axles, gearboxes, and other automotive rotary components.