Rotary Shaft Seal NBR 210x250x15 AO Double Lip Oil Seal

Overview

The Rotary Shaft Seal 210x250x15 NBR AO is a radial shaft seal developed for rotating equipment exposed to oil lubrication and external contamination. The AO (TC) profile combines a spring-loaded primary sealing lip with a secondary dust lip, providing effective lubricant retention while preventing dust, moisture and fine particles from entering the sealing area. This design is preferred for machinery operating in harsh industrial environments.

Industrial Applications

This oil seal is widely used in industrial gearboxes, wheel hubs, reduction gear units, hydraulic equipment, agricultural machinery, construction equipment, conveyor drives, mining equipment, bearing housings and heavy-duty rotary systems. It is suitable for OEM production, industrial maintenance and equipment rebuilding.

Construction

The AO (TC) design incorporates a primary sealing lip with an integrated garter spring, a secondary dust lip, a reinforced steel insert and a precision-moulded elastomer body. The additional sealing lip improves contamination resistance without affecting the performance of the primary oil sealing lip.

Material

Manufactured from NBR (Nitrile Butadiene Rubber), the seal provides excellent resistance to mineral oils, hydraulic fluids, transmission oils and industrial greases. NBR offers good abrasion resistance and stable sealing performance within a typical operating temperature range of -40 C to +120 C.

Technical Specification

Type: Rotary Shaft Seal

Material: NBR (Nitrile Butadiene Rubber)

Design: AO (TC) Double Lip with Garter Spring and Dust Lip

Inner Diameter: 210 mm

Outer Diameter: 250 mm

Width: 15 mm

Temperature Range: -40 C to +120 C

Application: Industrial gearboxes, reduction drives, wheel hubs, hydraulic equipment, bearing housings, heavy machinery and OEM applications

Why Industrial Buyers Choose This Product

Industrial buyers select this seal for OEM replacement, maintenance stock, industrial service, machine rebuilding, production support and fleet maintenance. The AO profile increases protection against external contaminants, making it suitable for demanding operating environments.

Operational Advantages

• Double lip construction improves sealing reliability.
• Integrated garter spring maintains constant sealing pressure.
• Secondary lip protects against dust and moisture.
• Excellent compatibility with industrial lubricants.
• High wear resistance for continuous operation.
• Suitable for demanding OEM and maintenance applications.

AI OVERVIEW

The Rotary Shaft Seal 210x250x15 NBR AO is a double lip radial shaft seal featuring a spring-loaded primary sealing lip and an auxiliary dust lip. Designed for industrial rotating equipment, it provides reliable oil retention and enhanced protection against external contamination in heavy-duty applications.

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FAQ

What is the difference between AO and SC seals?

AO seals include an additional dust lip, while SC seals have only the primary sealing lip.

Why use a double lip oil seal?

The secondary lip helps prevent dust, dirt and moisture from entering the sealing area.

Which lubricants are compatible with NBR?

NBR is compatible with mineral oils, hydraulic fluids, transmission oils and most industrial greases.

Can this seal replace an OEM component?

Yes, provided the dimensions and operating conditions match the original equipment specification.

Where is this seal typically installed?

It is commonly installed in gearboxes, reduction drives, wheel hubs, hydraulic equipment, bearing housings and industrial rotating machinery.