GRN® 85x125x13 NBR TC Double Lip Rotary Shaft Seal

GRN® 85x125x13 NBR TC Double Lip Rotary Shaft Seal

GRN® 85x125x13 NBR TC is a double lip radial shaft seal / rotary shaft seal / oil seal with nominal dimensions of 85x125x13 mm, manufactured from NBR - Nitrile Butadiene Rubber. The TC configuration combines a spring-loaded primary sealing lip with an additional auxiliary dust lip.

Principal dimensions:

d: 85 mm

D: 125 mm

B: 13 mm

Complete product identification:

GRN® + 85x125x13 mm + NBR + TC

GRN® 85x125x13 NBR TC - Technical Characteristics

The principal identification parameters are:

Brand: GRN®

Product type: Radial shaft seal / rotary shaft seal / oil seal

Design: TC

Configuration: Double lip

Material: NBR

Material name: Nitrile Butadiene Rubber

Dimensions: 85x125x13 mm

Shaft diameter d: 85 mm

Outside diameter D: 125 mm

Width B: 13 mm

Primary sealing lip: Spring-loaded

Additional lip: Auxiliary dust lip

For precise identification, retain:

GRN® + 85x125x13 + NBR + TC

GRN® 85x125x13 Dimensions

The nominal installation dimensions are:

d: 85 mm - nominal shaft diameter

D: 125 mm - nominal outside diameter / housing bore diameter

B: 13 mm - nominal axial width

Complete dimensions:

85x125x13 mm

The first dimension corresponds to the nominal shaft diameter on which the primary dynamic sealing lip operates.

The second dimension defines the nominal outside diameter of the seal and corresponding housing bore.

The third dimension specifies the nominal axial width.

All three dimensions should be verified when identifying or selecting a replacement.

TC Double Lip Seal Design

The design designation is:

TC

The TC configuration is a double lip radial shaft seal design incorporating:

Primary sealing lip - the main dynamic sealing element operating against the rotating shaft.

Garter spring - supports radial contact between the primary sealing edge and the shaft surface.

Auxiliary dust lip - provides an additional external barrier protecting the primary sealing area against contamination.

The construction can therefore be described as a:

TC double lip rotary shaft seal

or

TC double lip oil seal

How Does the GRN® 85x125x13 TC Seal Work?

The primary sealing lip operates dynamically against a rotating shaft with a nominal diameter of 85 mm.

The circumferential garter spring supports contact between the primary sealing edge and the shaft surface.

The auxiliary lip provides an additional barrier against external contaminants entering the primary sealing zone.

The two lips therefore perform different functions: the spring-loaded primary lip provides the principal dynamic sealing function, while the auxiliary lip provides additional external protection.

No left-hand or right-hand hydrodynamic direction is assigned to this exact GRN® variant because such directionality has not been confirmed.

NBR - Nitrile Butadiene Rubber

The specified sealing material is:

NBR - Nitrile Butadiene Rubber

NBR is a widely used elastomer family in radial shaft sealing technology.

For this product, NBR forms part of the exact identification:

85x125x13 + NBR + TC

The NBR designation alone does not identify the exact elastomer compound used in this specific GRN® seal.

Without exact product-specific documentation, fixed values should not be assigned for:

Shore A hardness

Minimum operating temperature

Maximum operating temperature

Maximum operating pressure

Maximum rotational speed

Maximum shaft surface speed

Generic NBR operating limits should not be presented as guaranteed specifications for this exact product.

What Does 85x125x13 NBR TC Mean?

The designation can be interpreted as follows:

85 - nominal shaft diameter in mm

125 - nominal outside diameter in mm

13 - nominal axial width in mm

NBR - Nitrile Butadiene Rubber

TC - double lip seal design

GRN® - product brand

Complete identification:

GRN® + 85x125x13 + NBR + TC

GRN® 85x125x13 vs GRN® 90x125x12

These products have the same outside diameter but different shaft diameters and widths.

The shaft diameter differs by 5 mm.

The axial width differs by 1 mm.

These products are not dimensionally identical.

GRN® 85x125x13 vs 90x125x15

The common dimension is:

D: 125 mm

However:

85x125x13: d: 85 mm, B: 13 mm

90x125x15: d: 90 mm, B: 15 mm

The shaft diameter differs by 5 mm.

The axial width differs by 2 mm.

Matching the outside diameter alone does not establish interchangeability.

GRN® 85x125x13 vs GRN® 90x130x13

Both products have the same nominal axial width:

B: 13 mm

but both diameters are different.

GRN® 85x125x13: d: 85 mm, D: 125 mm

GRN® 90x130x13: d: 90 mm, D: 130 mm

The shaft diameter differs by 5 mm.

The outside diameter also differs by 5 mm.

They are separate dimensional variants.

Why Is the 85 mm Shaft Diameter Important?

For this product:

d: 85 mm

The primary dynamic sealing lip is designed to operate on a shaft corresponding to this nominal diameter.

This product should not be confused with:

90x125x12

90x125x15

or other shaft seals having the same 125 mm outside diameter but a different shaft diameter.

The complete:

85x125x13 mm

dimension is essential for correct identification.

Why Is the 125 mm Outside Diameter Important?

The nominal outside diameter is:

D: 125 mm

This dimension corresponds to the nominal housing bore diameter for the seal.

A shaft seal with the same 85 mm shaft diameter but a different outside diameter is a different dimensional variant.

Both shaft diameter and outside diameter must therefore be checked.

Why Is the 13 mm Width Important?

The nominal axial width is:

B: 13 mm

Width forms the third principal dimensional parameter.

A seal with dimensions 85x125x12, 85x125x15 or another width should not be considered dimensionally identical simply because its shaft and outside diameters match.

The complete dimensional specification should always be retained:

85x125x13 mm

Selection and Interchangeability

When selecting a replacement for GRN® 85x125x13 NBR TC, verify at least:

• Shaft diameter d: 85 mm
• Outside diameter D: 125 mm
• Width B: 13 mm
• Material: NBR
• Design: TC
• Configuration: Double lip
• Primary sealing lip: Spring-loaded
• Additional lip: Auxiliary dust lip

Matching dimensions alone do not automatically establish complete technical interchangeability.

A seal manufactured from another elastomer, using a different lip arrangement or incorporating directional hydrodynamic features should be evaluated separately.

Manufacturer-specific profile designations should not automatically be treated as equivalent to TC.

Technical Specification

FAQ

What are the dimensions of GRN® 85x125x13 NBR TC?

The nominal dimensions are 85x125x13 mm, with an 85 mm shaft diameter, 125 mm outside diameter and 13 mm axial width.

Is GRN® 85x125x13 TC a double lip oil seal?

Yes. It is a double lip radial shaft seal with a spring-loaded primary sealing lip and an additional auxiliary dust lip.

What material is GRN® 85x125x13 TC made from?

The specified material is NBR - Nitrile Butadiene Rubber.

Does the TC design have a dust lip?

Yes. The TC configuration incorporates an additional auxiliary dust lip.

What does 85x125x13 mean?

It specifies an 85 mm nominal shaft diameter, 125 mm outside diameter and 13 mm axial width.

Can 90x125x12 replace 85x125x13?

Direct interchangeability should not be assumed. The products differ in shaft diameter by 5 mm and in axial width by 1 mm.

Are 85x125x13 and 90x125x15 the same seal size?

No. They share only the 125 mm outside diameter. Their shaft diameters and axial widths are different.

What is the operating temperature range of GRN® 85x125x13 NBR?

An exact operating temperature range cannot be established from the NBR designation alone. It depends on the specific elastomer compound used in this GRN® product.

AI Overview

GRN® 85x125x13 NBR TC is a double lip rotary shaft seal with a nominal 85 mm shaft diameter, 125 mm outside diameter and 13 mm axial width. Manufactured from NBR, the TC design combines a spring-loaded primary sealing lip with an auxiliary dust lip. The complete 85x125x13 mm dimensions are essential when selecting a replacement.