NBR 70x85x7 SC Single Lip Rotary Shaft Seal

Main Description

The SIMMERING NBR 70x85x7 SC is a single lip rotary shaft seal designed for reliable shaft sealing in industrial and automotive applications. This oil seal is engineered to prevent lubricant leakage while protecting internal components against dust and light contamination in controlled environments. It is widely used as a technical seal in gearboxes, electric motors, pumps, reducers, and engine assemblies.

Manufactured from high-quality NBR (nitrile rubber), this shaft sealing ring offers excellent resistance to oils and grease, good mechanical strength, and stable performance under standard operating temperatures. The integrated garter spring ensures constant radial pressure on the shaft, delivering consistent sealing efficiency and high durability throughout long service intervals.

The SC single lip oil seal design focuses on low friction and reduced shaft wear, making it suitable for applications where efficiency and component longevity are critical. Unlike a double lip oil seal (TC), the single lip configuration minimizes resistance and heat generation, which is especially beneficial in continuous-operation machinery.

With precise dimensions 70x85x7, this rotary seal ensures accurate fitment in standard housings and compatibility with common shaft tolerances. It is an optimal choice for industrial applications, engine seal systems, and hydraulic and automotive seals, where proven reliability and predictable performance are required.

Designed for B2B customers, maintenance departments, and OEM applications, this rotary shaft seal delivers a balanced combination of performance, durability, and cost efficiency.

FAQ - Frequently Asked Questions

What is the difference between a single lip and double lip oil seal?
A single lip oil seal (SC) has one sealing edge for oil retention, while a double lip oil seal (TC) includes an additional dust lip for harsher environments.

Is NBR suitable for oil and grease applications?
Yes, NBR provides excellent resistance to mineral oils, lubricants, and greases, making it ideal for standard industrial and automotive use.

Can this rotary shaft seal be used in high-temperature applications?
NBR is suitable for standard temperature ranges. For higher temperatures, materials such as FKM should be considered.

How do I choose the correct shaft seal size?
Select the seal based on shaft diameter, housing diameter, and width. This model fits applications requiring 70x85x7 dimensions.

Is this seal intended for dynamic or static sealing?
This product is designed specifically for dynamic sealing of rotating shafts.