CORTECO 12011717 NBR COMBI Rotary Shaft Seal - 105 x 130 x 12 mm

Applications

The CORTECO 12011717 NBR COMBI is a precision-engineered rotary shaft seal designed for demanding industrial and automotive environments. With an inner diameter of 105 mm, outer diameter of 130 mm and width of 12 mm, it serves as a technical seal in rotating shaft systems where reliable sealing, long life and resistance to oils and grease are required. Typical applications include gearboxes and driveline components (notably matching OEM cross-reference GRAZIANO TRASMISSIONI 70635), hydraulic drives, engines and general heavy-duty industrial equipment.

Advantages & Key Features

• Material: NBR (nitrile butadiene rubber) offering high durability and excellent resistance to oils, greases and standard hydraulic fluids.

• Design: COMBI version means combined sealing lips (often inner sealing lip with additional dust lip) which enhances protection against external contaminants and ensures the oil seal retains lubricant reliably in rotary applications.

• Dimensions: Precisely 105 x 130 x 12 mm - widely used size for industrial seal rings in rotating shaft systems.

• High durability: Engineered for industrial applications requiring a shaft sealing ring, technical seal or rotor oil seal. Its construction supports robust performance in demanding environments.

• Resistance to oils and grease: The seal is purpose-built to withstand exposure to lubricants, hydraulic oils and greases common in automotive and industrial systems.

• Industrial and automotive applications: Designed for use where a rotary seal, oil seal or shaft sealing ring is required - from transmissions to heavy-duty machinery, supporting both hydraulic and automotive seals markets.

Technical Data

• Manufacturer: CORTECO

• Part number: 12011717 (COMBI version)

• Material: NBR - nitrile butadiene rubber

• Dimensions: 105 mm (inner diameter) x 130 mm (outer diameter) x 12 mm width

• Type: oil seal / rotary shaft seal / shaft sealing ring

• Cross-reference: GRAZIANO TRASMISSIONI 70635

• Usage: Suitable for rotating shafts where sealing of lubricant and exclusion of contaminants is critical.

Why choose this rotary shaft seal?
In modern industrial and automotive systems the sealing solution must meet exacting demands: the rotary shaft seal must keep lubricant in, and contaminants out, thereby protecting bearings and drive systems. As shown in technical catalogues, a rotary shaft seal (also called radial oil seal) is designed to permit rotation of a shaft while maintaining sealing effectiveness and excluding ingress of dust or moisture. The market for rotary shaft seals is growing due to automation, more complex machinery and increasing requirements for reliability. By choosing this CORTECO seal you secure a professional, industrial-grade technical seal that addresses these requirements—truly an oil seal, shaft sealing ring or rotary seal built for high durability and industrial applications.

FAQ

Q1: What’s the difference between a COMBI (or double-lip) seal and a standard single-lip oil seal?
A: A standard single-lip oil seal (single sealing lip) handles basic oil retention and sealing duties. A COMBI or double-lip design includes an extra lip (often a dust lip) which adds protection from external contamination—ideal for industrial or heavy-duty applications where both lubricant retention and ingress prevention are crucial.

Q2: Why choose NBR material rather than other elastomers for this oil seal?
A: Nitrile‐butadiene rubber (NBR) offers excellent resistance to mineral oils, greases and typical automotive/industrial hydraulic fluids. It delivers good durability in moderate temperature ranges and is cost-effective for many applications. In contrast, for extreme temperature or highly aggressive chemical media, other elastomers such as FPM/Viton® might be selected.

Q3: How to select the correct seal size for a shaft?
A: Key selection criteria include correct inner diameter (matching shaft diameter), correct outer diameter (matching housing bore) and correct width (axial space available). Additionally consider the material (e.g., NBR vs other elastomer), lip design (single vs double lip), operating environment (lubricant type, speed, temperature) and type of application (industrial vs automotive). For this product the dimensions 105x130x12 mm must match the shaft/housing combination.

Q4: Can this seal be used for hydraulic as well as automotive applications?
A: Yes. The CORTECO 12011717 NBR COMBI seal is engineered for demanding environments including hydraulic drives, transmissions, drivelines and heavy-duty rotating shafts where an oil seal or rotary shaft seal is required. Its material and design features support both industrial and automotive uses.

Q5: What are the benefits of ordering through our B2B platform?
A: Ordering via our B2B platform gives you access to a professional industrial-grade rotary shaft seal, bulk order options, technical support for selecting correct seal dimensions and application, and fast dispatch from our warehouse in Lublin (ul. Smoluchowskiego 1, building 4) with 24h delivery to minimise downtime in production or maintenance operations.