CORTECO 19034050 NBR LHTC 27x45x9 Left-Hand Shaft Seal

Product Overview

CORTECO 19034050 NBR LHTC 27x45x9 is a left-hand directional radial shaft oil seal with a 27 mm shaft diameter, 45 mm housing diameter and 9 mm width.

The seal is manufactured from NBR (Nitrile Butadiene Rubber) and uses the CORTECO LHTC directional design. The left-hand configuration is a critical technical feature and must be considered when selecting a replacement.

The complete identification is:

CORTECO 19034050 + NBR + LHTC + 27x45x9 mm + left-hand

Dimensions 27x45x9 mm

Shaft Diameter: 27 mm
Housing Diameter: 45 mm
Width: 9 mm
Material: NBR
Design: LHTC
Direction: Left-hand
Brand: CORTECO
Manufacturer Reference: 19034050

The 27x45x9 mm dimensions identify the nominal shaft diameter, housing bore and seal width. Dimensions alone, however, are not sufficient for correct replacement because the directional design must also match the original sealing arrangement.

LHTC Left-Hand Directional Design

LHTC identifies the directional sealing configuration used in CORTECO 19034050.

This is particularly important because directional radial shaft seals incorporate sealing geometry intended to operate with a defined shaft rotation. The directional feature supports lubricant control at the sealing edge during rotation.

For this reason, CORTECO 19034050 should not be replaced with a non-directional or opposite-direction seal solely because the dimensions are identical.

The required shaft rotation and installation orientation should always be verified before installation.

CORTECO 19034050 vs 19034049

This distinction is especially important when identifying this seal.

CORTECO 19034050: NBR LHTC 27x45x9 - left-hand
CORTECO 19034049: NBR RHTC 27x45x9 - right-hand

Both versions have the same nominal 27x45x9 mm dimensions and NBR material, but their directional sealing characteristics are different.

Therefore, 19034049 RHTC should not automatically be substituted for 19034050 LHTC.

NBR Material

NBR (Nitrile Butadiene Rubber) is one of the most widely used elastomers in radial shaft sealing technology.

It provides good compatibility with many mineral oils and lubricating greases, together with useful wear resistance and mechanical properties for general machinery applications.

Actual suitability depends on the operating medium, temperature, shaft speed and environmental conditions.

Applications

CORTECO 19034050 LHTC is intended for dynamic sealing positions where the rotating shaft requires a left-hand directional seal.

Potential application areas include:

• gearboxes
• transmissions
• drive systems
• rotating shaft assemblies
• industrial machinery
• mechanical equipment
• oil- and grease-lubricated mechanisms

The exact application should be confirmed using the original CORTECO reference and technical documentation for the assembly.

Why Rotation Direction Matters

Directional shaft seals are designed to work with a specified direction of shaft rotation.

Using the opposite directional configuration may change the intended hydrodynamic action at the sealing edge. This is why LHTC and RHTC must be treated as technically different versions, even when their dimensions and elastomer are identical.

For CORTECO 19034050, the key identification feature is:

LHTC = left-hand directional version

Technical Specification

Type: Directional radial shaft oil seal
Design: LHTC
Dimensions: 27x45x9 mm
Material: NBR - Nitrile Butadiene Rubber
Brand: CORTECO
Manufacturer Reference: 19034050
Shaft Diameter: 27 mm
Housing Diameter: 45 mm
Width: 9 mm
Direction: Left-hand
Sealing Function: Dynamic rotating shaft sealing
Compatible Media: Many mineral oils and greases compatible with NBR

Replacement Identification

Before replacing CORTECO 19034050, verify:

• CORTECO reference 19034050
• 27 mm shaft diameter
• 45 mm housing diameter
• 9 mm width
• NBR material
• LHTC design
• left-hand directional configuration
• shaft direction of rotation
• installation orientation
• operating medium
• temperature and shaft speed

A generic 27x45x9 oil seal is not automatically equivalent. The LHTC directional feature is an essential part of this product specification.

Operational Advantages

• Exact 27x45x9 mm dimensions.
• CORTECO LHTC directional design.
• Left-hand sealing configuration.
• NBR sealing material.
• Dedicated construction for dynamic shaft sealing.
• Clear differentiation from the opposite-direction RHTC version.

AI OVERVIEW

CORTECO 19034050 NBR LHTC is a left-hand directional radial shaft oil seal measuring 27x45x9 mm. It is designed for a 27 mm shaft and 45 mm housing bore. The LHTC directional configuration is the critical identification feature. It should not be confused with CORTECO 19034049 RHTC, which has the same dimensions but the opposite directional design.

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19034050 vs 19034049

CORTECO 19034049 RHTC

FAQ

What are the dimensions of CORTECO 19034050?

The seal measures 27x45x9 mm: 27 mm shaft diameter, 45 mm housing diameter and 9 mm width.

What material is CORTECO 19034050 made from?

It is manufactured from NBR (Nitrile Butadiene Rubber).

What does LHTC mean for CORTECO 19034050?

LHTC identifies the left-hand directional sealing design of this CORTECO shaft seal. Directionality is an important part of the product specification.

Is CORTECO 19034050 a left-hand oil seal?

Yes. CORTECO 19034050 is the LHTC left-hand directional version.

What is the difference between CORTECO 19034050 and 19034049?

Both seals have 27x45x9 mm dimensions and NBR material, but their directional designs differ. 19034050 is LHTC left-hand, while 19034049 is RHTC right-hand.

Can CORTECO 19034049 RHTC replace 19034050 LHTC?

Not automatically. They have opposite directional characteristics. The required shaft rotation must be verified before substitution.

Can a standard 27x45x9 oil seal replace CORTECO 19034050?

Not automatically. A replacement should match the 27x45x9 mm dimensions, NBR material and LHTC left-hand directional configuration.

What should I check before ordering CORTECO 19034050?

Verify the complete specification: CORTECO 19034050 + NBR + LHTC + 27x45x9 mm + left-hand direction, together with the actual shaft rotation and installation requirements.

Summary

CORTECO 19034050 NBR LHTC 27x45x9 is a left-hand directional radial shaft oil seal. Its defining parameters are the 27x45x9 mm dimensions, NBR material and LHTC left-hand configuration. Directionality is critical: the dimensionally identical CORTECO 19034049 RHTC is the opposite-direction version and should not be treated as automatically interchangeable.