GRN® 90x120x15 NBR TC Double Lip Rotary Shaft Seal

GRN® 90x120x15 NBR TC Double Lip Rotary Shaft Seal

GRN® 90x120x15 NBR TC is a double lip radial shaft seal / rotary shaft seal / oil seal with nominal dimensions of 90x120x15 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: 120 mm

B: 15 mm

Complete product identification:

GRN® + 90x120x15 mm + NBR + TC

The complete dimensional designation is important because multiple radial shaft seals for a 90 mm shaft are available with different outside diameters and axial widths.

GRN® 90x120x15 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: 90x120x15 mm

Shaft diameter d: 90 mm

Outside diameter D: 120 mm

Width B: 15 mm

Primary sealing lip: Spring-loaded

Additional lip: Auxiliary dust lip

For precise identification, retain:

GRN® + 90x120x15 + NBR + TC

GRN® 90x120x15 Dimensions

The nominal installation dimensions are:

d: 90 mm - nominal shaft diameter

D: 120 mm - nominal outside diameter / housing bore diameter

B: 15 mm - nominal axial width

Complete dimensions:

90x120x15 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 of the seal.

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.

This configuration can therefore be described as a:

TC double lip rotary shaft seal

or

TC double lip oil seal

How Does the GRN® 90x120x15 TC Seal Work?

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

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

The auxiliary lip helps limit the ingress of external contaminants into the primary sealing zone.

The two sealing lips therefore perform different functions: the spring-loaded primary lip provides the main 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:

90x120x15 + NBR + TC

The NBR designation alone does not, however, 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 90x120x15 NBR TC Mean?

The designation can be interpreted as follows:

90 - nominal shaft diameter in mm

120 - nominal outside diameter in mm

15 - nominal axial width in mm

NBR - Nitrile Butadiene Rubber

TC - double lip seal design

GRN® - product brand

Complete identification:

GRN® + 90x120x15 + NBR + TC

GRN® 90x120x15 vs 90x125x15

This is an important comparison because both variants have the same shaft diameter and axial width.

The critical difference is the outside diameter:

D: 120 mm vs D: 125 mm

The difference is 5 mm.

These are separate dimensional variants and should not be treated as dimensionally interchangeable.

GRN® 90x120x15 vs GRN® 90x125x12

These variants differ in two dimensions:

The outside diameter differs by 5 mm.

The axial width differs by 3 mm.

They are separate dimensional variants.

GRN® 90x120x15 vs GRN® 90x130x13

The variants share the same nominal shaft diameter but differ in both outside diameter and width.

GRN® 90x120x15: D: 120 mm, B: 15 mm

GRN® 90x130x13: D: 130 mm, B: 13 mm

The outside diameter difference is 10 mm.

The axial width difference is 2 mm.

These products are not dimensionally identical.

GRN® 90x120x15 vs GRN® 90x140x13

Both variants are designed around a nominal:

d: 90 mm

However:

GRN® 90x120x15: D: 120 mm, B: 15 mm

GRN® 90x140x13: D: 140 mm, B: 13 mm

The outside diameter differs by 20 mm, while the axial width differs by 2 mm.

Matching the shaft diameter alone does not establish interchangeability.

Why Is the 120 mm Outside Diameter Important?

For this product:

D: 120 mm

This is a key identification parameter distinguishing it from other GRN® shaft seals designed for a 90 mm shaft.

Other variants may have outside diameters such as:

125 mm

130 mm

140 mm

160 mm

Therefore, identifying a seal only as a “90 mm shaft seal” is insufficient.

The complete dimensional designation:

90x120x15 mm

should be used.

Why Is the 15 mm Width Important?

The nominal axial width is:

B: 15 mm

Width is an integral part of the dimensional specification.

Even if another seal has the same 90 mm shaft diameter and 120 mm outside diameter, a different axial width represents a different dimensional variant.

For accurate identification, retain the complete:

90x120x15 mm

designation.

Selection and Interchangeability

When selecting a replacement for GRN® 90x120x15 NBR TC, verify at least:

• Shaft diameter d: 90 mm
• Outside diameter D: 120 mm
• Width B: 15 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 another lip configuration or incorporating directional hydrodynamic features should be evaluated separately.

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

Technical Specification

FAQ

What are the dimensions of GRN® 90x120x15 NBR TC?

The nominal dimensions are 90x120x15 mm, with a 90 mm shaft diameter, 120 mm outside diameter and 15 mm axial width.

Is GRN® 90x120x15 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® 90x120x15 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 90x120x15 mean?

It specifies a 90 mm nominal shaft diameter, 120 mm outside diameter and 15 mm axial width.

What is the difference between 90x120x15 and 90x125x15?

Both have a 90 mm shaft diameter and 15 mm width, but their outside diameters are 120 mm and 125 mm, a difference of 5 mm.

Can 90x125x15 replace 90x120x15?

Direct interchangeability should not be assumed. The outside diameters differ by 5 mm, so the seals correspond to different nominal housing bore diameters.

What is the operating temperature range of GRN® 90x120x15 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® 90x120x15 NBR TC is a double lip rotary shaft seal with a nominal 90 mm shaft diameter, 120 mm outside diameter and 15 mm axial width. Manufactured from NBR, the TC design combines a spring-loaded primary sealing lip with an auxiliary dust lip. The complete 90x120x15 mm dimensions are essential when selecting a replacement.