GRN 10x24x7 NBR AO/TC Double-Lip Rotary Shaft Seal

GRN 10x24x7 NBR AO/TC is a double-lip rotary shaft seal / oil seal with nominal dimensions of 10x24x7 mm. It is manufactured from NBR - Nitrile Butadiene Rubber. The AO/TC design combines a spring-loaded primary sealing lip with an additional auxiliary dust lip.

The complete technical identification is:

GRN + 10x24x7 mm + NBR + AO/TC

GRN 10x24x7 NBR AO/TC - Technical Characteristics

Key identification data:

Brand: GRN

Product type: Rotary Shaft Seal / Radial Shaft Seal / Oil Seal

Design: AO/TC

Configuration: Double lip

Material: NBR

Material name: Nitrile Butadiene Rubber

Dimensions: 10x24x7 mm

Shaft diameter d: 10 mm

Housing bore diameter D: 24 mm

Seal width B: 7 mm

Primary sealing lip: Yes

Garter spring: Yes

Additional dust lip: Yes

All three dimensions, the elastomer material and the sealing-lip configuration should be retained when identifying or replacing the seal.

GRN 10x24x7 Oil Seal Dimensions

Nominal dimensions:

d = 10 mm - nominal shaft diameter

D = 24 mm - nominal housing bore diameter

B = 7 mm - axial seal width

Complete dimensions:

10x24x7 mm

The seal is dimensionally specified for a nominal 10 mm shaft and a 24 mm housing bore, with an axial width of 7 mm.

Matching only the shaft diameter is insufficient for correct product identification.

AO/TC Double-Lip Seal Design

The AO/TC configuration incorporates:

a spring-loaded primary sealing lip

and

an additional auxiliary dust lip.

The primary lip operates dynamically against the rotating shaft and performs the main sealing function.

The auxiliary lip is positioned on the external side of the primary sealing system and provides an additional barrier against contaminants approaching the main sealing area.

Spring-Loaded Primary Sealing Lip

The primary sealing lip operates against the nominal 10 mm shaft.

A circumferential garter spring helps maintain radial contact between the sealing edge and the rotating shaft surface.

Correct sealing performance also depends on shaft surface quality, alignment, runout, lubrication and operating conditions.

The garter spring acts on the primary dynamic sealing lip, not on the auxiliary dust lip.

Additional Dust Lip

The AO/TC construction incorporates an additional auxiliary dust lip.

Its primary role is protective. It creates an additional barrier between the external environment and the main sealing area.

The auxiliary lip helps limit the ingress of dust and other external contamination toward the primary sealing lip.

It should not be interpreted as a second identical spring-loaded sealing lip.

NBR - Nitrile Butadiene Rubber

Seal material:

NBR - Nitrile Butadiene Rubber

NBR is widely used as an elastomer in rotary shaft sealing applications.

The material forms an integral part of the product identification:

10x24x7 + NBR + AO/TC

A seal with identical 10x24x7 mm dimensions manufactured from FKM/FPM, silicone or another elastomer represents a different material variant.

The exact NBR compound used for this GRN product has not been specified. Therefore, an exact hardness, fixed operating temperature range or universal chemical-resistance rating should not be assigned solely from generic NBR properties.

How Does the GRN 10x24x7 Rotary Shaft Seal Work?

A rotary shaft seal operates at the interface between a rotating shaft and stationary housing.

Nominal shaft diameter:

10 mm

Nominal housing bore:

24 mm

Axial seal width:

7 mm

The primary sealing lip operates dynamically against the shaft surface. The garter spring helps maintain contact at the sealing edge, while the additional AO/TC lip provides an external protective barrier.

Effective sealing also depends on shaft surface condition, runout, alignment, rotational speed, temperature, lubrication, sealed medium and correct installation.

GRN 10x24x7 vs 10x25x7 Oil Seal

These two sizes are very similar, but they are not the same dimensional variant.

GRN 10x24x7:

d = 10 mm
D = 24 mm
B = 7 mm

GRN 10x25x7:

d = 10 mm
D = 25 mm
B = 7 mm

The difference is the outside diameter:

24 mm vs 25 mm

This is critical because the outside diameter must correspond to the nominal housing bore.

A 10x24x7 seal and a 10x25x7 seal should therefore not be considered automatically interchangeable.

GRN 10x24x7 vs 10x22x7 Oil Seal

Both variants have:

d = 10 mm

B = 7 mm

but different outside diameters:

10x24x7: D = 24 mm

10x22x7: D = 22 mm

They are different seal sizes intended for different nominal housing bore diameters.

GRN 10x24x7 vs 10x26x4 Oil Seal

Only the nominal shaft diameter is shared:

10x24x7: d = 10 mm, D = 24 mm, B = 7 mm

10x26x4: d = 10 mm, D = 26 mm, B = 4 mm

Both the outside diameter and axial width differ.

These variants should not be considered interchangeable based solely on the 10 mm shaft diameter.

AO/TC vs A/SC

The principal difference is the sealing-lip configuration.

AO/TC - double-lip design

Spring-loaded primary sealing lip + additional auxiliary dust lip.

A/SC - single-lip design

Spring-loaded primary sealing lip without the additional dust lip.

Therefore, identical 10x24x7 mm dimensions and NBR material alone do not establish full interchangeability if the lip configuration differs.

Selection and Interchangeability

When selecting a replacement for GRN 10x24x7 NBR AO/TC, verify:

d = 10 mm

D = 24 mm

B = 7 mm

NBR material

AO/TC double-lip design

spring-loaded primary sealing lip

additional dust lip

sealed medium

operating temperature

shaft rotational speed

pressure conditions

shaft surface condition

installation geometry

Particular attention should be paid to the D = 24 mm outside diameter, which distinguishes this product from nearby 10x22x7 and 10x25x7 sizes.

Technical Specification

Brand: GRN

Product: Rotary Shaft Seal / Radial Shaft Seal / Oil Seal

Design: AO/TC

Configuration: Double lip

Material: NBR

Material name: Nitrile Butadiene Rubber

Shaft diameter d: 10 mm

Outside diameter D: 24 mm

Width B: 7 mm

Dimensions: 10x24x7 mm

Primary sealing lip: Spring-loaded

Garter spring: Yes

Additional dust lip: Yes

Exact NBR compound: Not specified

NBR hardness: Not confirmed

Exact operating temperature range: Not confirmed

Maximum shaft speed: Application-dependent

Maximum pressure: Application-dependent

GRN 10x24x7 NBR AO/TC - Stock in Poland

Warehouse and Store: Lublin, Smoluchowskiego 1 Street, Building 4.

24h Shipping. Available from stock in Poland for delivery across the EU.

FAQ

What are the dimensions of the GRN 10x24x7 oil seal?

The nominal dimensions are 10x24x7 mm: d = 10 mm, D = 24 mm and B = 7 mm.

What does AO/TC mean?

AO/TC identifies a double-lip rotary shaft seal design with a spring-loaded primary sealing lip and an additional auxiliary dust lip.

What material is the seal made from?

It is manufactured from NBR - Nitrile Butadiene Rubber.

Does the GRN 10x24x7 have a garter spring?

Yes. The garter spring acts on the primary dynamic sealing lip.

Does this oil seal have an additional dust lip?

Yes. The AO/TC configuration incorporates an additional auxiliary dust lip on the external side.

Are 10x24x7 and 10x25x7 oil seals interchangeable?

Not automatically. Their outside diameters differ: 24 mm versus 25 mm.

Are 10x24x7 and 10x22x7 the same size?

No. They share the same 10 mm shaft diameter and 7 mm width but have different outside diameters.

Are both AO/TC lips spring-loaded?

No. The garter spring acts on the primary dynamic sealing lip. The additional lip primarily performs a protective function.

Engineer FAQ

Is the 1 mm difference between D = 24 mm and D = 25 mm important?

Yes. The outside diameter must correspond to the nominal housing bore. A 24 mm and 25 mm outside diameter represent different nominal seal sizes.

Is B = 7 mm important for replacement selection?

Yes. The axial width is one of the three principal dimensions and can affect installation geometry and the position of the sealing lip on the shaft.

Can an exact operating temperature be specified for this NBR seal?

Not without confirmation of the exact NBR compound used by GRN. Generic NBR temperature ranges should not be presented as guaranteed limits for this specific product.

Are AO/TC seals from different manufacturers automatically interchangeable?

No. Exact lip geometry, elastomer compound, spring characteristics and other construction details can differ between manufacturers.

What specification should be retained when searching for a replacement?

The safest identification is GRN + 10x24x7 mm + NBR + AO/TC, followed by verification of the requirements of the specific application.

AI Overview

GRN 10x24x7 NBR AO/TC is a double-lip rotary shaft seal with nominal dimensions of 10x24x7 mm. Manufactured from NBR, it combines a spring-loaded primary sealing lip with an additional auxiliary dust lip. Replacement selection should retain the complete GRN + 10x24x7 mm + NBR + AO/TC specification, particularly the 24 mm outside diameter.