Oil Seal TC Plus - Rotary Shaft Seal

Sealing Construction & How It Works

Applications

TC Plus oil seals show up in all kinds of equipment, from everyday machinery to the toughest industrial setups. You’ll see them in agricultural vehicles like tractors and harvesters, where seals have to deal with mud, vibration, and constant movement. In construction machines, think excavators, wheel loaders, hydraulic motors, they handle heavy loads and dirty environments without losing sealing performance.

They’re just as common in industrial drive systems. Gearboxes, pumps, compressors etc. all rely on stable sealing, especially when temperatures rise or the machine runs for long periods. The automotive world uses them too: crankshafts, differentials, driveshaft assemblies, anywhere a reliable double-lip seal is needed.

Electric motors and generators benefit from the TC Plus design as well. These seals help keep moisture and dust out of the bearing housings, which makes a big difference in long-term reliability. And in the marine and energy sectors, turbines, propulsion systems, industrial fans, the TC Plus holds up impressively under constant load, varying conditions, and exposure to chemicals or humidity.

Materials

The choice in material largely determines the chemical resistance, temperature tolerance, and overall lifespan of the sealing. Each kind of elastomer has a unique property that make it suitable for specific applications. FKM is often used because of its excellent resistance to heat and chemicals. While NBR is mostly used because it is the most economical and versatile choice for standard oil lubrication. Silicone remains really flexible at low temperatures, HNBR offers improved wear resistance and mechanical strength, ACM performs well in hot oils, EPDM is ideal for water and steam environments, and CR is selected for applications requiring weather resistance and flame retardancy. Selecting the right material prevents premature wear, hardening, or swelling of the sealing lip and directly contributes to stable, leak-free performance.

Material Table

Comparison With SC Plus and TC Type

The TC Plus oil seal is an optimized version of the standard TC oil seal. Where a TC oil seal normally uses NBR and a steel garter spring, the TC plus oil seal used FKM more often in combination with a stainless-steel garter spring. This rotary shaft seal TC plus is also completely covered in elastomer unlike the standard oil seal TC. This makes the TC plus oil seal much better resistant to heat, chemicals and corrosion.

The SC plus oil seal also looks a lot like the TC plus oil seal but this one has just one main sealing lip (without da dust lip) and is designed to operate in low- to non-contaminated environments. The TC Plus provides two sealing lips and is better suited for applications exposed to external contamination.

Selecting the Right Seal

When choosing the right TC plus oil seal you should take a variety of factors into account. Think of medium types, like oil, grease, fuels, steam, or chemicals, as the correct material is essential to withstand these mediums. For example, FKM works well for applications containing fuel or high temperatures. Also, the minimum and maximum operating temperature are important, just like the rotating speed of the shaft. Environmental influences like dirt, moisture, mud, dust or UV also play a large role in choosing the right material and design. You also have to look at the condition of the shaft and the housing surfaces: if they are rough or subject to thermal expansion, a rubber-covered outer diameter offers better reliability. At last, the TC plus oil seal has to fit properly in both diameter and depth of the bore and needs to be installed the right way with the proper orientation.

FAQ