CORTECO 19026740 NBR RHTC 23x37x7 mm - Right-Hand Double Lip Rotary Shaft Oil Seal

Characteristics of CORTECO 19026740

CORTECO 19026740 is a radial shaft oil seal designed to limit lubricant leakage where a rotating shaft passes through a stationary housing.

Its distinguishing feature is the RHTC profile - Right-Hand TC, identifying a double lip oil seal with right-hand directional sealing geometry.

The directional design is intended to assist lubricant return towards the sealed assembly when the shaft rotates in the specified direction.

The additional lip helps protect the primary sealing interface against external contamination.

Key product characteristics:

• Manufacturer: CORTECO.

• Manufacturer part number: 19026740.

• Additional catalogue designation: 19026740B.

• Seal profile: RHTC.

• Directional design: Right-hand.

• Sealing material: NBR.

• Nominal shaft diameter: 23 mm.

• Nominal housing bore diameter: 37 mm.

• Axial width: 7 mm.

• Construction: Double lip.

• Additional dust protection lip.

• Directional sealing geometry designed to support lubricant retention.

• Associated OEM references: Citroën 6822EK, Peugeot 6822EK and Toyota 9031123004.

The right-hand directional profile is an important selection criterion.

An RHTC seal should not automatically be replaced by a left-hand directional or non-directional oil seal of the same dimensions.

Technical Specifications

The maximum shaft speed, permissible operating pressure, exact temperature range, elastomer hardness and product mass have not been independently confirmed for this specific part number.

These parameters should be verified using the relevant CORTECO technical documentation when required for engineering selection.

What Does CORTECO 19026740 NBR RHTC Mean?

CORTECO - Manufacturer

CORTECO is a brand within the Freudenberg Group, supplying sealing solutions and replacement components for automotive and technical applications.

CORTECO radial shaft seals are designed for mechanical assemblies requiring sealing between rotating and stationary components.

19026740 - Manufacturer Part Number

19026740 identifies this specific CORTECO radial shaft oil seal.

The product is also associated with the catalogue designation 19026740B.

When selecting a replacement, the complete manufacturer part number should be checked together with the RHTC profile, material and dimensions.

Oil seals with identical nominal dimensions may have different directional sealing geometries and are not necessarily interchangeable.

NBR - Nitrile Butadiene Rubber

NBR is a synthetic elastomer widely used in rotary shaft oil seals.

Its relevant properties include:

• Compatibility with many mineral-based lubricating oils.

• Resistance to numerous industrial greases.

• Elasticity suitable for dynamic contact sealing.

• Wear resistance under appropriate lubrication conditions.

• Suitability for many conventional mechanical sealing applications.

NBR is not universally compatible with all chemicals, synthetic lubricants or operating temperatures.

Material compatibility must be verified against the actual lubricant and operating conditions.

RHTC - Right-Hand Directional Double Lip Profile

The RHTC designation identifies a right-hand directional TC-type oil seal.

In this profile:

• RH identifies right-hand directional sealing geometry.

• TC identifies a double lip radial shaft oil seal construction.

• The primary sealing lip is responsible for lubricant retention.

• The additional lip helps protect the main sealing interface against contaminants.

The right-hand directional geometry is intended to assist the return of lubricant towards the sealed space during compatible shaft rotation.

Important: The term right-hand describes the directional sealing design. The corresponding shaft rotation must be interpreted using the viewing direction specified by the manufacturer.

Clockwise rotation viewed from one end of a shaft appears counterclockwise when viewed from the opposite end.

Therefore, the correct application should be confirmed using the relevant technical drawing or equipment documentation rather than relying solely on the term "clockwise rotation".

23x37x7 mm - Dimensional Designation

The dimensions identify:

• 23 mm - nominal shaft diameter.

• 37 mm - nominal housing bore diameter.

• 7 mm - axial seal width.

All three dimensions must correspond to the equipment's installation requirements.

The nominal shaft diameter refers to the intended shaft size rather than the free-state diameter of the elastomer sealing lip.

Construction and Operating Principle

CORTECO 19026740 is designed to seal the interface between a rotating shaft and a stationary housing.

Its operation depends on the primary sealing lip, right-hand directional geometry, additional dust lip and correct installation.

Primary Sealing Lip

The primary sealing lip maintains contact with the rotating shaft surface.

Its purpose is to limit the escape of compatible lubricating oil or grease from the sealed mechanical assembly.

During operation, the lip creates a dynamic sealing interface.

Effective sealing requires suitable lubrication, shaft surface finish, alignment and operating conditions.

Right-Hand Directional Sealing Geometry

The defining characteristic of the RHTC profile is its right-hand directional design.

The sealing geometry is intended to work with a specified shaft rotation direction.

Under suitable operating conditions, the directional features can help return lubricant towards the sealed space.

This action supports lubricant retention at the primary sealing interface.

If the shaft rotates in the opposite direction, the intended directional pumping effect may be reduced or may not operate as designed.

For this reason, RHTC should not be treated as a universal seal for both shaft rotation directions.

The actual rotation direction must be checked against the manufacturer's specified viewing orientation.

Additional Dust Protection Lip

The second lip helps reduce the entry of dust and small contaminants into the primary sealing area.

This can be beneficial where the shaft is exposed to environmental contamination.

However, the additional lip does not automatically make the seal suitable for continuous water immersion, high-pressure washing or highly abrasive operating conditions.

Shaft Surface and Sealing Performance

The effectiveness of CORTECO 19026740 depends on several factors:

• Shaft surface roughness.

• Shaft and housing concentricity.

• Radial shaft runout.

• Shaft surface wear or corrosion.

• Lubricant compatibility.

• Operating temperature.

• Shaft surface speed.

• Correct directional compatibility.

• Environmental contamination.

A new oil seal may not eliminate leakage if the shaft surface is damaged or the housing bore is unsuitable.

CORTECO RHTC vs TC and LHTC Seal Profiles

Radial shaft seals with identical dimensions may have different directional sealing characteristics.

This comparison refers to the conventional meanings of these profile designations. The exact construction should be checked against the relevant manufacturer's documentation.

CORTECO 19026740 RHTC should not automatically be replaced with a TC or LHTC oil seal, even when all products have dimensions of 23x37x7 mm.

The directional sealing geometry may directly affect lubricant retention.

OEM References and Cross-References

The following OEM references are associated with CORTECO 19026740:

Additional CORTECO catalogue designation: 19026740B.

These references can assist with replacement part identification.

They do not independently confirm compatibility with every vehicle produced by the listed manufacturers.

Before ordering, verify the original part number against the parts catalogue for the specific vehicle model, production year and installation position.

Applications of CORTECO 19026740

CORTECO 19026740 is associated with catalogue references for Citroën, Peugeot and Toyota.

It is designed for dynamic radial sealing of a rotating shaft in an assembly requiring right-hand directional sealing geometry.

Typical application categories for this type of seal include:

• Rotating shafts in mechanical assemblies.

• Selected power transmission mechanisms.

• Gearbox housings.

• Oil-lubricated shaft assemblies.

• Mechanical components requiring lubricant retention.

• Shaft locations requiring additional dust protection.

These are general applications of the RHTC construction, not confirmed installation positions for CORTECO 19026740 in every listed type of equipment.

A specific engine or gearbox application should not be assumed without manufacturer catalogue confirmation.

Selection and Interchangeability

Before purchasing CORTECO 19026740 NBR RHTC, verify the following:

1. Manufacturer part number: 19026740 or 19026740B.

2. Seal profile: RHTC.

3. Right-hand directional sealing geometry.

4. Sealing material: NBR.

5. Nominal shaft diameter: 23 mm.

6. Nominal housing bore diameter: 37 mm.

7. Axial width: 7 mm.

8. Presence of the additional dust lip.

9. Shaft rotation direction and specified viewing orientation.

10. Lubricant type and material compatibility.

11. Shaft and housing surface condition.

12. Original equipment reference and application compatibility.

The directional profile is particularly important.

Even when dimensions and material are identical, a replacement may not be suitable if its directional geometry does not correspond to the actual shaft rotation.

Installation and Operating Recommendations

Correct installation is essential for reliable sealing performance.

Before installation, clean the shaft and housing bore thoroughly.

Inspect the shaft for:

• Scratches and sharp edges.

• Corrosion.

• Wear grooves left by the previous seal.

• Surface irregularities.

• Excessive radial runout.

• Misalignment.

During installation:

• Use a suitable seal installation tool.

• Apply installation force evenly to the appropriate seal body surface.

• Avoid direct impact on the sealing lips.

• Protect the lips when passing over threads, keyways or sharp edges.

• Maintain correct alignment with the housing bore.

• Install the seal to the specified depth.

• Provide appropriate lubrication of the primary sealing lip.

• Confirm the correct orientation relative to the sealed medium.

• Verify compatibility between the right-hand RHTC profile and the shaft rotation direction.

For conventional oil-retaining applications, the primary sealing lip normally faces the lubricant being retained, while the additional dust lip faces the external environment.

Always follow the equipment manufacturer's instructions where a different installation arrangement is specified.

Storage

Store unused NBR oil seals in a clean, dry environment away from direct sunlight, excessive heat, ozone and chemicals that may affect elastomer properties.

Avoid deformation of the sealing lips during storage.

Alternative Designations and Search References

The product may also be identified using the following descriptions:

• CORTECO 19026740

• CORTECO 19026740B

• 19026740B CORTECO

• CORTECO RHTC 23x37x7

• CORTECO 23x37x7 NBR

• CORTECO 23x37x7 right-hand oil seal

• CORTECO 19026740 rotary shaft oil seal

• CORTECO 19026740 Simmerring

• CORTECO 23x37x7 directional shaft seal

• Right-hand double lip oil seal 23x37x7 NBR

Associated OEM references:

• Citroën 6822EK.

• Peugeot 6822EK.

• Toyota 9031123004.

These alternative descriptions are intended for product identification and do not constitute additional verified OEM references.

FAQ - CORTECO 19026740

1. What are the dimensions of CORTECO 19026740?

The seal is designed for a nominal shaft diameter of 23 mm, housing bore diameter of 37 mm and axial width of 7 mm. Its full dimensional designation is 23x37x7 mm.

2. What does RHTC mean on CORTECO 19026740?

RHTC identifies a right-hand directional double lip radial shaft oil seal. The construction includes directional sealing geometry and an additional dust protection lip.

3. Is CORTECO 19026740 a right-hand oil seal?

Yes. The RH designation in RHTC identifies the right-hand directional version. The corresponding shaft rotation must be interpreted using the manufacturer's specified viewing direction.

4. What material is CORTECO 19026740 made from?

The sealing material is NBR, or nitrile butadiene rubber, commonly used in oil sealing applications involving compatible lubricants.

5. Does CORTECO 19026740 have a dust lip?

Yes. The RHTC profile is a double lip construction with an additional protective lip.

6. Can an RHTC oil seal be replaced with a standard TC oil seal?

Not without technical verification. RHTC incorporates right-hand directional sealing geometry that may not be present in a standard non-directional TC seal.

7. What OEM references are associated with CORTECO 19026740?

The supplied references are Citroën 6822EK, Peugeot 6822EK and Toyota 9031123004. Compatibility should be confirmed for the specific vehicle.

8. Can CORTECO 19026740 operate with reverse shaft rotation?

Correct directional sealing performance should not be assumed under reverse rotation. The RHTC profile should be matched to the shaft rotation direction specified for the equipment.

CORTECO 19026740 - Key Technical Information

CORTECO 19026740 NBR RHTC is a right-hand directional double lip radial shaft oil seal with dimensions of 23x37x7 mm. Made from nitrile butadiene rubber, it features an additional dust protection lip and directional sealing geometry intended to assist lubricant retention. Associated OEM references include Citroën and Peugeot 6822EK and Toyota 9031123004. Correct selection requires verification of the RHTC profile and shaft rotation direction.

CORTECO 19026740 is available from simmering.pl, a specialist supplier of industrial oil seals, rotary shaft seals and rolling bearings.

With warehouse operations in Lublin, Poland, simmering.pl supplies engineering businesses, industrial maintenance departments and international B2B customers, with worldwide shipping options.