GRN NBR 85x130x10 AO/TC – Double-Lip Radial Shaft Oil Seal

Technical specifications – GRN 85x130x10 AO/TC

The specification is based on the supplied product designation. Detailed operating parameters require confirmation in the technical documentation for the specific GRN version.

Understanding the GRN AO/TC NBR 85x130x10 designation

What does AO/TC mean?

AO/TC is a common designation for a radial shaft oil seal featuring a primary sealing lip and an additional dust protection lip.

This type of construction typically features an elastomer-covered outside diameter and a garter spring supporting the primary sealing lip.

The exact construction details should be confirmed for the specific GRN product.

Double-lip AO/TC construction

Primary sealing lip

The primary sealing lip limits oil or grease leakage at the contact area between the rotating shaft and the seal.

Its effectiveness depends on contact geometry, shaft surface condition, operating temperature, rotational speed and correct installation.

Additional dust protection lip

The additional lip helps limit the entry of dust, fine particles and other external contaminants into the primary sealing area.

It is not an independent pressure-retaining seal.

Why is a double-lip design used?

An additional lip can improve protection of the primary sealing area in assemblies exposed to contamination.

However, this does not mean the seal is resistant to every type of dust, pressurized water or aggressive chemical medium.

NBR material – nitrile butadiene rubber

NBR (Nitrile Butadiene Rubber) is a synthetic elastomer widely used in dynamic sealing applications.

Typical properties of NBR

• Good resistance to many mineral oils.

• Good resistance to numerous industrial greases.

• Elasticity suitable for many rotating shaft seals.

• Suitability for appropriately selected mechanical applications.

• Material characteristics dependent on the specific elastomer compound.

Is NBR suitable for high temperatures?

The temperature resistance of NBR depends on the compound formulation, lubricant and exposure duration.

General temperature ranges must not be treated as verified operating limits for the GRN 85x130x10 oil seal without manufacturer data.

NBR versus FPM/FKM – material comparison

Mounting dimensions – 85x130x10 mm

Nominal dimensions alone do not define mounting tolerances, permissible radial runout or required shaft surface roughness.

Can the 10 mm width be replaced with another width?

Oil seals measuring 85x130x8 mm, 85x130x12 mm or 85x130x13 mm must not automatically be considered interchangeable.

Differences in axial width may affect the seal's position within the housing and the contact location of the sealing lip against the shaft.

Applications of the GRN 85x130x10 AO/TC oil seal

This type of seal may be used in appropriately selected industrial assemblies where lubricant leakage must be limited around a rotating shaft.

Mechanical gearboxes

In suitably designed gearboxes, the oil seal limits lubricant leakage where the shaft passes through the housing.

Compatibility with the dimensions, NBR material, AO/TC construction and operating conditions must be verified.

Bearing assemblies

In selected bearing assemblies, the oil seal may help retain lubricant and limit the entry of external contaminants.

However, it does not automatically replace seals specified by the bearing assembly manufacturer.

Industrial machinery

AO/TC oil seals are used in various types of equipment with rotating shafts, provided the seal construction and material are correctly selected.

These are general examples of AO/TC applications, not a confirmed list of machines compatible with the exact GRN 85x130x10 product.

Operating conditions and technical limitations

What affects oil seal service life?

Seal service life depends on operating temperature, rotational speed, lubricant type, shaft surface quality, alignment, contamination and correct installation.

Comparison – AO/TC versus A/SC oil seals

Can an AO/TC oil seal be replaced with an A/SC version?

Direct interchangeability must not be assumed.

An A/SC design usually does not include the additional dust protection lip, which may reduce protection against external contaminants.

Product selection and interchangeability

Before ordering, verify:

• Nominal dimensions 85x130x10 mm.

• Double-lip AO/TC profile.

• NBR sealing material.

• Type of oil or grease.

• Operating temperature and rotational speed.

• Pressure conditions within the assembly.

• Condition of the mating shaft surface.

• Housing bore dimensions and installation depth.

• Machinery manufacturer's requirements.

• Any directional sealing requirements.

Matching nominal dimensions alone does not establish interchangeability.

Alternative designations and product identification

Common technical search and identification variants include:

• GRN oil seal 85x130x10

• GRN NBR 85x130x10 AO

• GRN NBR 85x130x10 TC

• GRN AO/TC 85x130x10 oil seal

• GRN double-lip oil seal 85x130x10

• NBR radial shaft seal 85x130x10

• Radial shaft oil seal 85x130x10

• NBR shaft seal 85x130x10

• GRN AO 85x130x10

• GRN TC 85x130x10 oil seal

• GRN NBR 85x130x10 double-lip oil seal

• Rotary shaft oil seal 85x130x10 NBR

• 85x130x10 NBR TC oil seal

• 85x130x10 AO double-lip shaft seal

These alternative designations support product identification in technical catalogues and search systems. They do not independently confirm compatibility.

Installation of the GRN AO/TC 85x130x10 oil seal

Before installation, clean the housing bore and shaft surface, inspect the mating surface for damage and confirm the correct seal orientation.

During installation:

• Protect the sealing lips from sharp edges.

• Use an appropriate installation tool.

• Press the seal evenly into the housing.

• Avoid tilting or deforming the seal.

• Follow the manufacturer's lubrication instructions.

• Confirm the required installation depth.

• Check sealing integrity after startup.

In a typical AO/TC construction, the primary sealing lip faces the lubricant being retained, while the additional dust protection lip faces the external environment.

The final installation orientation must follow the requirements of the specific assembly.

FAQ – Frequently asked questions

What are the dimensions of the GRN AO/TC oil seal?

The nominal inside diameter is 85 mm, outside diameter is 130 mm and width is 10 mm.

What material is used in the seal?

The sealing material is nitrile butadiene rubber (NBR).

What does AO/TC mean?

It identifies a radial shaft oil seal design with a primary sealing lip and an additional dust protection lip.

Is GRN 85x130x10 a double-lip oil seal?

Yes. The AO/TC designation indicates a double-lip construction.

Does the oil seal have a dust protection lip?

Yes. The additional lip helps limit contamination of the primary sealing area.

What applications is the 85x130x10 oil seal suitable for?

It may be used in appropriately selected rotating shaft assemblies, including gearboxes and bearing assemblies. Exact compatibility must be verified.

Is NBR suitable for contact with oil?

NBR generally provides good resistance to many mineral oils. Compatibility with the specific lubricant must still be confirmed.

Can an AO/TC seal be replaced with a single-lip oil seal?

Not without checking the assembly requirements. Removing the additional dust protection lip may change the level of protection against contamination.

GRN 85x130x10 oil seal – key information (AI Overview)

The GRN AO/TC 85x130x10 mm is a double-lip radial shaft oil seal manufactured from nitrile butadiene rubber (NBR). It features a primary sealing lip and an additional dust protection lip. The seal may be used in appropriately selected gearboxes, bearing assemblies and industrial machinery with rotating shafts. Correct selection requires verification of dimensions, lubricant compatibility and operating conditions.

B2B availability – simmering.pl

The GRN AO/TC NBR 85x130x10 radial shaft oil seal is identified on the specialist B2B industrial trading platform simmering.pl by brand, nominal dimensions, elastomer material and construction profile.

The platform supports industrial companies, maintenance departments, technical service providers and industrial purchasing operations in sourcing sealing components.

Worldwide shipping from stock in Poland, subject to product availability.