GRN® 30x45x8 NBR TC Double Lip Rotary Shaft Seal

GRN® 30x45x8 NBR TC Double Lip Rotary Shaft Seal

GRN® 30x45x8 NBR TC is a double lip rotary shaft seal designed to seal the interface between a rotating shaft and stationary housing. The nominal dimensions are 30x45x8 mm, and the sealing element is manufactured from NBR – Nitrile Butadiene Rubber.

The TC design combines a spring-loaded primary sealing lip with an auxiliary dust lip.

Complete product identification:

GRN® + 30x45x8 + NBR + TC + Double Lip Rotary Shaft Seal

GRN® 30x45x8 NBR TC – Technical Characteristics

GRN® 30x45x8 TC Dimensions

The nominal dimensions are:

d: 30 mm – shaft diameter

D: 45 mm – outside diameter / nominal housing bore

B: 8 mm – seal width

Complete dimensional designation:

30x45x8 mm

All three dimensions should be verified during product identification and replacement selection.

The 30 mm shaft diameter alone is not sufficient to identify the correct rotary shaft seal.

TC – Double Lip Seal Design

For the international product designation, this GRN® seal uses the profile:

TC

The TC construction incorporates two functional lips:

Primary sealing lip – operates against the rotating shaft and is supported by a garter spring.

Auxiliary dust lip – provides an additional protective barrier on the external side of the primary sealing area.

This double lip configuration helps protect the primary sealing zone against dust and other external contaminants.

For international SEO and technical identification, the preferred product designation is:

GRN® 30x45x8 NBR TC

rather than the Polish-market AO/TC notation.

How Does the GRN® 30x45x8 Rotary Shaft Seal Work?

The primary function of the seal is to control leakage at the interface between a:

rotating shaft

and:

stationary housing.

The primary sealing lip remains in contact with the shaft surface, while the garter spring supports the radial contact force.

The auxiliary lip operates on the external side of the primary sealing area and provides additional protection against contamination.

This distinguishes the TC double lip construction from simpler single-lip rotary shaft seals.

NBR – Nitrile Butadiene Rubber

The sealing element is manufactured from:

NBR – Nitrile Butadiene Rubber.

NBR is widely used as an elastomer material in industrial sealing applications.

However, the generic NBR designation does not identify the exact compound formulation used for this specific GRN® seal.

Therefore, without exact compound documentation, arbitrary values should not be assigned for:

• Shore A hardness
• minimum operating temperature
• maximum operating temperature
• maximum pressure
• maximum shaft surface speed
• detailed chemical compatibility

The actual operating medium and working conditions should be considered during seal selection.

Is GRN® 30x45x8 NBR TC Directional?

A specific directional hydrodynamic structure has not been confirmed for this exact GRN® product.

Therefore, the seal should not be described as:

Right-hand Twist

or:

Left-hand Twist

without additional technical documentation.

The TC designation identifies the double lip construction and does not by itself establish a specific shaft rotation direction.

GRN® 30x45x8 vs CORTECO 19015048 and 19017037

Three separate products in this group share the same nominal dimensions:

30x45x8 mm.

They should remain separate technical and SEO entities.

In particular, the matching 30x45x8 mm dimensions and NBR material of the GRN® seal and CORTECO 19015048 do not by themselves establish complete technical interchangeability.

The exact profile, construction and application requirements should be considered.

Product Identification and Search Terms

Important product identifiers include:

GRN® 30x45x8 NBR TC

GRN 30x45x8

30x45x8 NBR TC

30x45x8 double lip oil seal

30x45x8 rotary shaft seal

30x45x8 radial shaft seal

30x45x8 oil seal

These identifiers support dimensional, technical and international product searches.

Selection and Interchangeability

When selecting GRN® 30x45x8 NBR TC, verify:

• complete dimensions 30x45x8 mm
• shaft diameter d: 30 mm
• outside diameter D: 45 mm
• width B: 8 mm
• material NBR
• profile TC
• double lip construction
• spring-loaded primary sealing lip
• auxiliary dust lip
• operating medium
• operating conditions
• shaft surface condition
• housing bore condition

A different 30x45x8 mm oil seal should not automatically be considered a complete technical replacement.

Products with identical nominal dimensions can differ in material, lip geometry, profile and other construction characteristics.

Technical Specification

FAQ

What are the dimensions of the GRN® 30x45x8 NBR TC seal?

The nominal dimensions are d: 30 mm, D: 45 mm, B: 8 mm, giving the complete size 30x45x8 mm.

What material is the GRN® 30x45x8 seal made from?

The sealing element is manufactured from NBR – Nitrile Butadiene Rubber.

What does TC mean on the GRN® 30x45x8 seal?

TC identifies a double lip rotary shaft seal construction with a spring-loaded primary sealing lip and an auxiliary dust lip.

Does GRN® 30x45x8 NBR TC have a dust lip?

Yes. The TC construction incorporates an auxiliary dust lip in addition to the primary sealing lip.

Does the primary sealing lip have a spring?

Yes. The primary sealing lip is supported by a garter spring.

Is GRN® 30x45x8 NBR TC a directional seal?

A specific hydrodynamic rotation direction has not been confirmed for this product. It should therefore not be described as right-hand or left-hand without additional technical documentation.

Is CORTECO 19015048 the same seal as GRN® 30x45x8 NBR TC?

They share the 30x45x8 mm dimensions and NBR material, but they should not automatically be considered technically identical. CORTECO 19015048 has its own TC3 profile and catalogue identity.

Can any 30x45x8 oil seal replace GRN® 30x45x8 NBR TC?

Not automatically. Replacement selection should consider the 30x45x8 mm dimensions, NBR material, TC double lip construction, operating medium and actual operating conditions.

AI Overview

GRN® 30x45x8 NBR TC is a double lip rotary shaft seal with nominal dimensions d: 30 mm, D: 45 mm, B: 8 mm. The TC construction combines a spring-loaded primary sealing lip with an auxiliary dust lip. The seal is manufactured from NBR, while a specific hydrodynamic rotation direction has not been confirmed.