GRN® 90x125x12 NBR TC Double Lip Rotary Shaft Seal

GRN® 90x125x12 NBR TC Double Lip Rotary Shaft Seal

GRN® 90x125x12 NBR TC is a double lip radial shaft seal / rotary shaft seal / oil seal with nominal dimensions of 90x125x12 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: 90 mm

D: 125 mm

B: 12 mm

Complete product identification:

GRN® + 90x125x12 mm + NBR + TC

The complete dimensional designation is particularly important because other shaft seals for a 90 mm shaft and 125 mm housing bore can have a different axial width.

GRN® 90x125x12 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: 90x125x12 mm

Shaft diameter d: 90 mm

Outside diameter D: 125 mm

Width B: 12 mm

Primary sealing lip: Spring-loaded

Additional lip: Auxiliary dust lip

For precise identification, retain:

GRN® + 90x125x12 + NBR + TC

GRN® 90x125x12 Dimensions

The nominal installation dimensions are:

d: 90 mm - nominal shaft diameter

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

B: 12 mm - nominal axial width

Complete dimensions:

90x125x12 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.

All three dimensions should be retained when identifying the correct seal.

TC Double Lip Seal Design

The 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 surface.

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

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

The primary lip performs the main dynamic sealing function, while the auxiliary lip provides additional protection against external contamination.

This configuration can be described as a:

TC double lip oil seal

or

TC double lip rotary shaft seal

How Does the GRN® 90x125x12 TC 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 helps limit the ingress of external contamination into the primary sealing area.

The TC configuration therefore combines the primary dynamic shaft sealing function with an additional external protective barrier.

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, the material forms part of the complete identification:

90x125x12 + NBR + TC

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

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 product.

What Does 90x125x12 NBR TC Mean?

The designation can be interpreted as follows:

90 - nominal shaft diameter in mm

125 - 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® + 90x125x12 + NBR + TC

GRN® 90x125x12 vs 90x125x15

This is the most important dimensional comparison for this product.

The shaft and outside diameters are identical:

d: 90 mm

D: 125 mm

The critical difference is the axial width:

B: 12 mm vs B: 15 mm

The difference is 3 mm.

These are separate dimensional variants, and direct interchangeability should not be assumed.

GRN® 90x125x12 vs GRN® 90x130x12

In this comparison, the shaft diameter and axial width are identical, but the outside diameter differs.

The critical difference is:

D: 125 mm vs D: 130 mm

The outside diameter differs by 5 mm.

These products are not dimensionally identical.

GRN® 90x125x12 vs GRN® 90x130x13

These variants differ in two dimensions:

GRN® 90x125x12: D: 125 mm, B: 12 mm

GRN® 90x130x13: D: 130 mm, B: 13 mm

The differences are:

5 mm in outside diameter

and

1 mm in axial width

The nominal shaft diameter of 90 mm is common to both variants, but this alone does not establish interchangeability.

Why Is the 12 mm Width Important?

The nominal axial width is:

B: 12 mm

A 90x125x15 seal has the same shaft and outside diameters but is 3 mm wider.

This makes the third dimension essential when identifying the correct product:

90x125x12

vs

90x125x15

The complete 90x125x12 mm dimensional designation should therefore be used when selecting or ordering this seal.

Why Is the 125 mm Outside Diameter Important?

The nominal outside diameter is:

D: 125 mm

Other GRN® seals designed for a 90 mm shaft may have outside diameters of:

130 mm

140 mm

160 mm

Therefore, matching the shaft diameter alone is not sufficient.

The complete dimensional specification:

90x125x12 mm

should always be verified.

Selection and Interchangeability

When selecting a replacement for GRN® 90x125x12 NBR TC, verify at least:

• Shaft diameter d: 90 mm
• Outside diameter D: 125 mm
• Width B: 12 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 with identical dimensions but a different elastomer or sealing design should be technically verified before substitution.

Designations used by other manufacturers should also not be considered equivalent to TC without verification of their actual construction.

Technical Specification

FAQ

What are the dimensions of GRN® 90x125x12 NBR TC?

The nominal dimensions are 90x125x12 mm, with a 90 mm shaft diameter, 125 mm outside diameter and 12 mm axial width.

Is GRN® 90x125x12 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® 90x125x12 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 on the external side of the primary sealing zone.

What is the difference between 90x125x12 and 90x125x15?

Both variants have a 90 mm shaft diameter and 125 mm outside diameter. Their axial widths are 12 mm and 15 mm, a difference of 3 mm.

Can 90x125x15 replace 90x125x12?

Direct interchangeability should not be assumed. The 90x125x15 variant is 3 mm wider, so the installation dimensions must be verified.

What is the difference between 90x125x12 and 90x130x12?

Both have a 90 mm shaft diameter and 12 mm width, but their outside diameters differ: 125 mm vs 130 mm.

What is the operating temperature range of GRN® 90x125x12 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® 90x125x12 NBR TC is a double lip rotary shaft seal with a nominal 90 mm shaft diameter, 125 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. The 90x125x15 variant has the same diameters but is 3 mm wider.