Rotary Shaft Seal Simrit 320x350x18 B2FG NBR

Applications

The Simrit 320x350x18 B2FG NBR rotary shaft seal is a single lip oil seal designed for large-diameter shafts in demanding industrial applications. It is commonly used in gearboxes, heavy machinery, industrial drives, power units and mechanical assemblies operating in clean or controlled environments. The B2FG design is optimized for reliable oil retention where an additional dust lip is not required.

Advantages

The single lip construction provides efficient rotary sealing while minimizing friction and shaft wear. The NBR (nitrile butadiene rubber) material offers proven resistance to oils and grease, stable elasticity and predictable performance within standard industrial temperature ranges. A metal-reinforced outer case ensures secure housing fit, while the integrated garter spring maintains constant radial pressure on the shaft, resulting in high durability and consistent sealing performance.

Technical Data

• Size: 320x350x18 mm

• Type: B2FG - single lip oil seal

• Sealing material: NBR (nitrile rubber)

• Design: metal case, spring-loaded sealing lip

• Function: radial rotary shaft sealing

Main Description

The Rotary Shaft Seal Simrit 320x350x18 B2FG NBR is a professional technical oil seal developed for reliable sealing of large rotating shafts. As a single lip rotary shaft seal, it focuses on effective lubricant retention while maintaining low friction and stable long-term operation.

The NBR sealing lip provides consistent resistance to mineral oils and greases, making this shaft sealing ring suitable for a wide range of industrial applications. The optimized lip geometry and integrated garter spring ensure uniform contact pressure on the shaft, reducing leakage risk and limiting wear of mating surfaces. The B2FG design, without an additional dust lip, is ideal for installations where cleanliness is controlled and precision sealing is required.

With standard dimensions of 320x350x18 mm, this oil seal is widely used for OEM production, maintenance and overhaul operations. It meets the expectations of B2B customers seeking durable, repeatable and technically proven sealing solutions for heavy-duty machinery and industrial drive systems.

FAQ

What is the difference between single and double lip oil seals?
Single lip seals retain lubricant, while double lip seals include an extra dust lip for contamination protection.

Is NBR suitable for industrial oil sealing?
Yes, NBR offers good resistance to oils, greases and standard industrial fluids.

Where is the B2FG rotary shaft seal typically used?
In gearboxes, heavy machinery, industrial drives and power units.

Is this oil seal suitable for continuous operation?
Yes, it is designed for long-term use under standard industrial conditions.

How do I select the correct rotary shaft seal size?
Selection is based on shaft diameter, housing bore diameter and seal width.