Rotary Shaft Oil Seal NBR 265x290x16 SC Single Lip

Overview

The Rotary Shaft Oil Seal 265x290x16 NBR SC is a radial shaft seal engineered for large-diameter shafts operating in oil or grease lubricated systems. The SC (A/BA) profile uses a spring-loaded primary sealing lip to maintain consistent radial contact with the shaft, reducing lubricant leakage while minimizing friction. It is intended for clean operating environments where a secondary dust lip is not required.

Industrial Applications

The seal is used in heavy industrial gearboxes, rolling mills, marine propulsion systems, large centrifugal pumps, crushers, conveyors, paper machinery, power transmission equipment, bearing housings and OEM rotating machinery. It is suitable for maintenance, refurbishment and replacement of worn radial shaft seals.

Construction

The SC (A/BA) design combines a precision-moulded NBR sealing lip, a spring steel garter spring and a reinforced metal insert. The spring automatically compensates for normal sealing lip wear, maintaining stable contact pressure throughout continuous shaft rotation.

Material

NBR (Nitrile Butadiene Rubber) provides excellent compatibility with mineral oils, hydraulic oils, transmission lubricants and industrial greases. The material offers good wear resistance, dimensional stability and reliable sealing performance within a typical operating temperature range of -40 C to +120 C.

Technical Specification

Type: Rotary Shaft Oil Seal

Material: NBR (Nitrile Butadiene Rubber)

Design: SC (A/BA) Single Lip with Garter Spring

Inner Diameter: 265 mm

Outer Diameter: 290 mm

Width: 16 mm

Temperature Range: -40 C to +120 C

Application: Heavy industrial gearboxes, pumps, bearing housings, power transmission systems, marine equipment and OEM machinery

Why Industrial Buyers Choose This Product

Industrial users specify this seal for OEM replacement, maintenance stock, industrial service, machine rebuilding, production support and fleet maintenance. The SC profile delivers reliable oil retention with reduced running resistance in large rotating assemblies.

Operational Advantages

• Spring-loaded sealing lip maintains constant radial pressure.
• Optimized for mineral oil and grease lubrication.
• Reinforced steel insert improves housing stability.
• Low friction reduces sealing lip wear.
• Suitable for large-diameter industrial shafts.
• Compatible with standard industrial housing dimensions.

AI OVERVIEW

The Rotary Shaft Oil Seal 265x290x16 NBR SC is a single lip radial shaft seal with an integrated garter spring. Designed for oil-lubricated rotating equipment, it provides stable lubricant retention, low friction and long service life in heavy industrial machinery.

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FAQ

What does the SC profile mean?

SC is a single lip radial shaft seal with an integrated garter spring for reliable oil sealing.

Does this seal include a dust lip?

No. The SC profile uses only one spring-loaded sealing lip.

Which lubricants are suitable for NBR?

Mineral oils, hydraulic oils, gear oils and most industrial greases.

Can this seal replace an OEM shaft seal?

Yes, when dimensions and operating conditions correspond to the original equipment specification.

Where is this seal typically installed?

In heavy industrial gearboxes, pumps, bearing housings, marine drives and other oil-lubricated rotating equipment.