GRN® 90x140x12 NBR TC Double Lip Rotary Shaft Seal

GRN® 90x140x12 NBR TC Double Lip Rotary Shaft Seal

GRN® 90x140x12 NBR TC is a double lip radial shaft seal / rotary shaft seal / oil seal with nominal dimensions of 90x140x12 mm, manufactured from NBR - Nitrile Butadiene Rubber. The TC configuration combines a spring-loaded primary sealing lip with an additional auxiliary dust lip.

The principal dimensions are:

d: 90 mm

D: 140 mm

B: 12 mm

Complete product identification:

GRN® + 90x140x12 mm + NBR + TC

The 12 mm axial width is particularly important because a closely related GRN® 90x140x13 NBR TC variant has the same shaft and outside diameters but is 1 mm wider.

GRN® 90x140x12 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: 90x140x12 mm

Shaft diameter d: 90 mm

Outside diameter D: 140 mm

Width B: 12 mm

Primary sealing lip: Spring-loaded

Additional lip: Auxiliary dust lip

For precise technical identification, retain:

GRN® + 90x140x12 + NBR + TC

GRN® 90x140x12 Dimensions

The nominal installation dimensions are:

d: 90 mm - nominal shaft diameter

D: 140 mm - nominal outside diameter / housing bore diameter

B: 12 mm - nominal axial width

Complete dimensions:

90x140x12 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 axial width.

For this variant, particular attention should be paid to:

B: 12 mm

The product should not be identified only as a "90x140 oil seal" because 90x140 seals are available with different widths.

TC Double Lip Seal Design

The English design designation is:

TC

TC identifies a double lip radial shaft seal configuration.

The construction incorporates:

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

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

Auxiliary dust lip - an additional lip on the external side of the primary sealing zone.

The primary lip performs the principal dynamic sealing function, while the auxiliary lip provides an additional barrier against external contamination.

The design is commonly described in English as:

TC double lip oil seal

or

TC double lip rotary shaft seal

How Does the GRN® TC Oil Seal Work?

The primary sealing lip operates dynamically against the rotating shaft surface with a nominal diameter of 90 mm.

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

The auxiliary lip is positioned toward the external side of the sealing arrangement and provides an additional contamination barrier.

The TC configuration therefore combines the primary dynamic shaft sealing function with additional protection of the sealing zone.

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 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 complete technical identification:

90x140x12 + NBR + TC

The NBR designation alone does not identify the exact elastomer compound used by GRN®.

Therefore, without exact product-specific documentation, no fixed values are 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 seal.

What Does 90x140x12 NBR TC Mean?

The designation can be interpreted as follows:

90 - nominal shaft diameter in mm

140 - nominal outside diameter in mm

12 - nominal axial width in mm

NBR - Nitrile Butadiene Rubber

TC - double lip seal design

GRN® - product brand

Complete identification:

GRN® + 90x140x12 + NBR + TC

GRN® 90x140x12 vs GRN® 90x140x13

This is the most important dimensional comparison for this product.

Both variants share:

d: 90 mm

D: 140 mm

NBR material

TC double lip design

The critical difference is the axial width:

B: 12 mm vs B: 13 mm

The difference is 1 mm.

These variants should remain separate product references and should not automatically be treated as interchangeable.

GRN® 90x140x12 vs GRN® 90x160x13

The dimensional differences are greater when compared with GRN® 90x160x13 NBR TC.

The 90x160x13 variant has:

20 mm larger outside diameter

and

1 mm greater axial width

The two products are not dimensionally identical.

Why Is the 12 mm Width Important?

The first two dimensions of this product are identical to the 90x140x13 variant.

Therefore, the third dimension is essential:

B: 12 mm

A difference of only 1 mm can easily be overlooked during product identification, especially when searching by shaft and housing diameter.

However:

90x140x12

and

90x140x13

are two different dimensional specifications.

The complete three-dimensional designation should always be retained.

Selection and Interchangeability

When selecting a replacement for GRN® 90x140x12 NBR TC, verify at least:

• Shaft diameter d: 90 mm
• Outside diameter D: 140 mm
• Width B: 12 mm
• Material: NBR
• Design: TC
• Configuration: Double lip
• Primary sealing lip: Spring-loaded
• Additional lip: Auxiliary dust lip

Matching only the 90 mm shaft diameter and 140 mm outside diameter is not sufficient.

A 90x140x13 mm seal has a different axial width and should not automatically be considered interchangeable.

Likewise, a seal with identical dimensions but a different material or construction should be technically verified before substitution.

Technical Specification

FAQ

What are the dimensions of GRN® 90x140x12 NBR TC?

The nominal dimensions are 90x140x12 mm, with a 90 mm shaft diameter, 140 mm outside diameter and 12 mm axial width.

Is GRN® 90x140x12 TC a double lip oil seal?

Yes. TC identifies a double lip radial shaft seal configuration with a primary sealing lip and an additional auxiliary dust lip.

What material is GRN® 90x140x12 TC made from?

The specified material is NBR - Nitrile Butadiene Rubber.

Does the primary sealing lip have a spring?

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

Does GRN® 90x140x12 TC have a dust lip?

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

What is the difference between 90x140x12 and 90x140x13?

Both variants have a 90 mm shaft diameter and 140 mm outside diameter. Their axial widths differ: 12 mm vs 13 mm.

Can GRN® 90x140x13 replace 90x140x12?

Direct interchangeability should not be assumed. The 90x140x13 variant is 1 mm wider, so the installation dimensions must be verified.

What is the operating temperature range of this NBR seal?

An exact operating temperature range cannot be established from the NBR designation alone. It depends on the specific elastomer compound used by the manufacturer.

AI Overview

GRN® 90x140x12 NBR TC is a double lip rotary shaft seal with a nominal 90 mm shaft diameter, 140 mm outside diameter and 12 mm axial width. Manufactured from NBR, the TC design combines a spring-loaded primary sealing lip with an auxiliary dust lip. It should be distinguished from the 90x140x13 variant, which is 1 mm wider.