Rotary Shaft Seal 6x12x3 ZBA NBR - Single Lip Oil Seal

Applications of the 6x12x3 Shaft Seal

NBR Material Properties and Durability

Technical Design and Specifications

Main Description

The 6x12x3 ZBA NBR rotary shaft seal is a compact oil seal designed for precise rotary sealing in small mechanical systems. This shaft sealing ring is used to limit oil or grease leakage while maintaining low friction and stable operation in light-duty and precision applications.

Manufactured from NBR (nitrile butadiene rubber), the seal offers reliable resistance to oils and grease, good elasticity, and dimensional stability under standard operating conditions. NBR is one of the most commonly used materials for technical seals due to its balanced performance, durability, and cost efficiency.

The ZBA design identifies a single lip oil seal without a spring, making it suitable for applications with low pressure, moderate shaft speed, and limited installation space. The absence of a spring simplifies the construction and allows use in compact housings where space constraints prevent the use of conventional spring-loaded seals. This type of seal is also commonly referred to as BAOF, ZBA, or VC, depending on industry terminology.

The 6x12x3 shaft seal is widely used in small motors, micro gear drives, precision devices, and auxiliary mechanical components, where accurate sealing and low drag are required. Common English search phrases related to this product include rotary shaft seal 6x12x3, NBR oil seal, single lip shaft seal, and small diameter oil seal.

Technical Data

• Product type: Rotary shaft seal / oil seal

• Dimensions: 6x12x3 mm

• Material: NBR (nitrile rubber)

• Design: ZBA - single lip oil seal

• Spring: none

• Function: Rotary sealing

• Application: Small shafts, precision mechanisms

• Alternative designations: ZBA, BAOF, VC

FAQ - Frequently Asked Questions

What is a ZBA shaft seal?
It is a single lip oil seal without a spring, designed for light-duty and precision sealing applications.

Is NBR suitable for oil and grease sealing?
Yes, NBR provides good resistance to oils and grease in standard operating environments.

What is the difference between single lip and double lip seals?
Single lip seals retain the lubricant, while double lip seals also protect against external contamination.

How do I select the correct shaft seal size?
The inner diameter must match the shaft diameter, the outer diameter the housing bore, and the width the available space.

Is this seal suitable for continuous operation?
Yes, when used within its intended operating limits.