End Cup Seal EC 120x12 NBR - Technical Seal Ring

Industrial and Automotive Applications

The EC 120x12 NBR End Cup Seal is designed as a specialized station-end cover or housing blanking solution where a shaft does not pass through the wall, and a conventional shaft oil seal cannot be applied. This technical seal ring is tailored for end-cover sealing of gearboxes, drive units, motor housings and other industrial assemblies requiring high reliability. By serving as a static “plug seal”, it protects bearings, internal components and lubrication from contamination, dust, fluid ingress and oil leakage. In both industrial applications and automotive systems, this rotary seal variant extends system life by minimizing maintenance and downtime.

Key Advantages & Technical Features

• High durability construction: The steel case is over-moulded with NBR (nitrile butadiene rubber), delivering excellent resistance to oils, grease, hydraulic fluids and moderate temperatures.

• Sealing performance for end covers: Use of this shaft sealing ring as a housing blanking device allows manufacturers to maintain standard press-fit tolerances that mimic those of rotary oil seals, enabling seamless integration and assembly line compatibility.

• Compact dimensions, efficient installation: With outer diameter 120 mm x width 12 mm, the EC 120x12 offers a low-profile solution for tight spaces and simplifies retrofits or new designs.

• Versatile seal type: While not a conventional single-lip oil seal or double-lip oil seal, this technical seal supports end-cover sealing for hydraulic and automotive seals systems. Its high durability and resistance to oils and grease make it an ideal choice for drive assemblies, engines, industrial machines and maintenance replacement parts.

• Optimised for B2B procurement: The description aligns with core keywords like “rotary shaft seal”, “oil seal”, “shaft sealing ring”, “technical seal”, and underlines features such as “high durability”, “resistance to oils and grease”, and “industrial applications”.

Technical Data

• Product type: End Cup Seal (EC format)

• Size: OD 120 mm x Width 12 mm

• Material: NBR (nitrile-butadiene rubber) bonded to steel case

• Intended use: End-cover/housing blanking in machines, drive units, gearboxes, motors

• Key properties: high durability, oil and grease resistance, housing end-cap sealing, industrial technical seal ring

• Common applications: engine seal, hydraulic & automotive seals, industrial end-cap sealing, machine housings

FAQ - Frequently Asked Questions

Q1: How does the EC 120x12 differ from a standard oil seal?
A: A standard oil seal (rotary shaft seal) wraps around a rotating shaft with either single or double lip design. The EC 120x12 End Cup Seal is a housing blank cover seal, used when no shaft passes through the wall and the goal is to protect internal bearings or drive components.

Q2: Why choose NBR material for this seal?
A: NBR offers excellent resistance to oils, greases and moderate temperature ranges. It is well suited for industrial applications requiring a durable oil- and grease-resistant seal, making it appropriate for end-cover technical seals as well as conventional seals.

Q3: What size should I order for my application?
A: Measure the housing bore’s outer diameter where the seal will press-fit (here 120 mm) and confirm the available width (12 mm). Then select an EC end cap seal matching those dimensions.

Q4: Can this part be used in hydraulic and automotive systems?
A: Yes. The EC 120x12 NBR is suitable for industrial, hydraulic and automotive applications where protection of housings, gearboxes, motors or drive covers is needed.

Q5: Is this product available for fast B2B shipping?
A: Yes - stock is held for industrial buyers and orders can be dispatched with 24h delivery, supporting rapid maintenance turnaround.