Oil Seal NBR 340x380x15 A Single-Lip - rotary shaft seal

Applications

The NBR Rotary Shaft Seal 340x380x15 A is designed for sealing large rotating shafts in industrial machinery. It is used as a shaft seal and rotary oil seal in gearboxes, pumps, industrial drives, production machines, and heavy-duty equipment. The single lip design is suitable for stable operating conditions where reliable oil and grease retention is required.

Design Advantages

Manufactured from NBR (nitrile rubber), this seal offers high resistance to oils and greases commonly used in industrial environments. The single lip type A construction provides low friction, stable contact with the shaft, and long service life. Compared to double lip designs, it reduces rotational resistance and is well suited for large-diameter applications requiring dependable and efficient technical sealing.

Technical Data

• Product type: rotary shaft seal / oil seal

• Design: single lip, type A

• Dimensions: 340x380x15 mm

• Material: NBR

• Resistance: oils, greases, standard industrial media

• Application: industrial machinery, rotating shafts

Main Description

The NBR Rotary Shaft Seal 340x380x15 A is a robust single lip oil seal engineered for demanding industrial applications involving large rotating shafts. Its primary function is to prevent lubricant leakage while protecting internal components from external contamination. The NBR elastomer ensures good elasticity, dimensional stability, and consistent sealing performance during long-term operation.

This rotary sealing solution is widely used in industrial machines where low friction, high durability, and predictable performance are required. In comparison to double lip seals, the single lip design minimizes wear and energy loss, making it a practical choice for gearboxes, motors, and power transmission systems. It is commonly selected by maintenance teams and OEMs as a reliable shaft sealing component for industrial equipment.

FAQ - Frequently Asked Questions

What is the difference between single lip and double lip seals?
Single lip seals generate less friction, while double lip seals provide additional protection against contamination.

What material is this seal made of?
It is made of NBR, resistant to oils, greases, and standard industrial fluids.

Is this seal suitable for large shafts?
Yes, the 340x380x15 size is intended for large-diameter industrial shaft 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 installation space.