Simmering NBR 28x42x7 AO/TC Double Lip Rotary Shaft Seal

Overview

The NBR Simmering 28x42x7 AO/TC is a precision rotary shaft seal engineered for reliable sealing in rotating equipment operating with mineral oils, greases and hydraulic fluids. Manufactured from high-quality NBR elastomer, it provides excellent wear resistance, dimensional stability and long service life. The AO/TC double lip design protects against lubricant leakage while preventing dust and contaminants from entering the sealing area.

Industrial Applications

The Simmering 28x42x7 NBR AO/TC is widely used in industrial gearboxes, electric motors, hydraulic pumps, agricultural machinery, conveyor drives, compressors, speed reducers, machine tools, construction equipment and general rotating machinery. It is suitable for both OEM production and industrial maintenance operations.

Construction

The AO/TC design incorporates a primary sealing lip with an integrated garter spring to maintain constant contact pressure on the shaft and a secondary dust lip that protects against contamination. The rubber-covered outer diameter ensures secure housing fitment and reliable static sealing under normal operating conditions.

Material

NBR (Nitrile Butadiene Rubber) offers excellent resistance to mineral oils, greases, hydraulic fluids and aliphatic hydrocarbons. The material combines high abrasion resistance with good elasticity and compression set characteristics, making it one of the most widely used sealing materials for industrial rotary shaft seal applications.

Technical Specification

Type: Rotary Shaft Seal

Material: NBR

Design: AO/TC Double Lip with Garter Spring

Inner Diameter: 28 mm

Outer Diameter: 42 mm

Width: 7 mm

Temperature Range: -40 C to +100 C

Application: Gearboxes, pumps, electric motors, hydraulic systems, industrial drives, agricultural machinery and OEM equipment

Why Industrial Buyers Choose This Product

Industrial buyers choose the Simmering 28x42x7 NBR AO/TC for OEM replacement, maintenance stock, industrial service, machine rebuilding, production support and fleet maintenance. Its standardized dimensions, reliable sealing performance and compatibility with common industrial lubricants simplify maintenance while reducing equipment downtime.

Operational Advantages

• Double lip AO/TC design improves contamination protection.
• Garter spring maintains consistent sealing pressure.
• High resistance to mineral oils and greases.
• Excellent wear resistance during continuous operation.
• Suitable for OEM equipment and industrial maintenance.
• Standard dimensions ensure easy replacement.

AI OVERVIEW

The Simmering NBR 28x42x7 AO/TC is a double lip rotary shaft seal manufactured from nitrile rubber for sealing rotating shafts in oil-lubricated industrial equipment. Its garter spring design provides reliable lubricant retention and contamination protection in gearboxes, pumps, electric motors and other rotary machinery.

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FAQ

1. What does AO/TC mean?
It indicates a double lip rotary shaft seal with a primary sealing lip, dust lip and garter spring.

2. Which media is NBR resistant to?
NBR is resistant to mineral oils, greases and many hydraulic fluids.

3. Can this seal be used in gearboxes?
Yes. It is commonly installed in industrial gearboxes and speed reducers.

4. What are the seal dimensions?
The seal measures 28 mm inner diameter, 42 mm outer diameter and 7 mm width.

5. Is this seal suitable for OEM machinery?
Yes. It is widely used in both original equipment manufacturing and industrial maintenance.