Rotary shaft seal 17x25x3 VC ZBA NBR - single lip oil seal

Application in rotary sealing systems

ZBA design - single lip without spring

NBR material and technical parameters

Main description

The 17x25x3 ZBA NBR rotary shaft seal is a technical shaft seal designed for standard rotary sealing applications in industrial and selected automotive equipment. It is a single lip oil seal manufactured from NBR (nitrile-butadiene rubber), featuring a ZBA design without a spring and an elastomer outer jacket. This construction allows for easy installation and stable sealing performance in applications with limited installation space and consistent operating conditions.

The NBR compound provides reliable resistance to oils and greases, making this seal suitable for commonly used lubricants in industrial machinery. The 17x25x3 ZBA oil seal is widely used as a machine shaft seal in small gear units, auxiliary drives, pumps, and mechanical assemblies where effective technical sealing is required at moderate rotational speeds.

Compared to a double lip oil seal, the ZBA single lip version offers a simplified structure focused on primary sealing. The absence of a spring reduces assembly time and minimizes the risk of damage during mounting, which is especially important in series production and maintenance operations. Despite its simple design, the seal delivers high durability when operated within recommended parameters.

The 17x25x3 ZBA NBR rotary shaft seal is intended for B2B customers seeking a cost-effective and repeatable sealing solution for standard industrial applications, both for new equipment and replacement during servicing.

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 additionally protects against external contamination.

What material is used in the 17x25x3 ZBA seal?
The seal is made of NBR, offering good resistance to oils and greases.

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

Where is this rotary shaft seal typically used?
In industrial machines, small gearboxes, pumps, and auxiliary drive systems.

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 installation space.