Rotary shaft seal 4x8x2 VC ZBA NBR - single lip oil seal

Application in precision rotary sealing

ZBA design - single lip without spring

NBR material and technical data

Main description

The 4x8x2 ZBA NBR rotary shaft seal is a compact shaft seal designed for basic rotary sealing applications where limited installation space and reliable performance are required. This single lip oil seal is manufactured from NBR (nitrile-butadiene rubber) and features a ZBA design without a spring, combined with an elastomer outer jacket for secure seating in the housing.

Thanks to its simple construction, the 4x8x2 ZBA seal is suitable for small mechanisms, precision devices, and light industrial equipment operating under stable conditions. The NBR compound provides good resistance to oils and greases, making this seal a practical solution for standard lubricated systems in industrial and automotive environments. As a rotary sealing element, it effectively prevents lubricant leakage along rotating shafts with small diameters.

Compared to a double lip oil seal, the ZBA single lip version focuses on primary sealing performance and easy installation. The absence of a spring reduces assembly complexity and minimizes the risk of damage during mounting, which is especially important in small-scale or series production. Despite its compact size, the seal offers high durability when used within its intended operating parameters.

The 4x8x2 ZBA NBR oil seal is commonly used as a shaft seal for machines, auxiliary drives, small motors, and precision assemblies. It is intended for B2B customers seeking a cost-effective and repeatable technical sealing solution for standard industrial applications.

FAQ - frequently asked questions

What is the difference between a single lip and a double lip oil seal?
A single lip oil seal provides basic oil sealing, while a double lip seal adds protection against external contamination.

What material is used in the 4x8x2 ZBA seal?
The seal is made from NBR, offering good resistance to oils and greases.

Does the lack of a spring affect sealing performance?
No, under standard operating conditions the ZBA design ensures stable and effective sealing.

Where is this rotary shaft seal typically used?
In small machines, precision devices, auxiliary drives, and light industrial applications.

How do I select the correct shaft seal size?
Match the inner diameter to the shaft, the outer diameter to the housing, and the width to the available space.