GRN® 13x25x5 NBR TC Double Lip Rotary Shaft Seal

GRN® 13x25x5 NBR TC Double Lip Rotary Shaft Seal

GRN® 13x25x5 NBR TC is a double lip rotary shaft seal with nominal dimensions 13x25x5 mm. The seal is manufactured from NBR – Nitrile Butadiene Rubber and uses the TC double lip construction, combining a spring-loaded primary sealing lip with an auxiliary dust lip. Its nominal dimensions are d: 13 mm, D: 25 mm, B: 5 mm.

GRN® 13x25x5 NBR TC – Technical Characteristics

GRN® 13x25x5 Dimensions

The nominal dimensions are:

d: 13 mm – shaft diameter

D: 25 mm – outside diameter

B: 5 mm – seal width

Complete dimensional designation:

13x25x5 mm

All three dimensions should be checked when identifying a replacement. A matching 13 mm shaft diameter alone does not establish interchangeability.

TC Double Lip Construction

The defining construction feature of GRN® 13x25x5 NBR TC is its double lip design.

It incorporates:

• a primary sealing lip operating against the rotating shaft,
• a garter spring supporting the contact force of the primary lip,
• an auxiliary dust lip on the external side of the sealing area.

The primary lip performs the main sealing function. The auxiliary lip provides an additional barrier against contaminants approaching the primary sealing zone from the outside.

This construction detail should be considered when comparing the GRN® seal with other products having the same 13x25x5 mm dimensions.

NBR – Nitrile Butadiene Rubber

The specified elastomer for this product is:

NBR – Nitrile Butadiene Rubber.

Material is an important part of the complete seal identification and should be considered together with the dimensions and lip construction when selecting a replacement.

The generic NBR designation does not identify the exact elastomer compound used for this GRN® reference. Therefore, specific values for Shore hardness, operating temperature range, maximum pressure or maximum shaft surface speed should not be assigned without exact product documentation.

TC and Rotation Direction

The TC designation identifies the double lip construction in the international version of this GRN® product.

It does not, by itself, confirm a right-hand or left-hand hydrodynamic sealing geometry.

For GRN® 13x25x5 NBR TC, a specific hydrodynamic rotation direction has not been confirmed.

Where an application requires a directional shaft seal, the rotation-direction requirement should therefore be checked separately.

Selection and Interchangeability

When selecting a replacement for GRN® 13x25x5 NBR TC, verify:

• shaft diameter d: 13 mm
• outside diameter D: 25 mm
• width B: 5 mm
• NBR material
• TC double lip construction
• spring-loaded primary sealing lip
• auxiliary dust lip
• operating medium
• actual operating conditions

Identical 13x25x5 mm dimensions alone do not establish full technical interchangeability.

A seal of the same size may differ in material, lip configuration, outside surface design, hydrodynamic geometry or other construction characteristics.

Technical Specification

FAQ

What are the dimensions of GRN® 13x25x5 NBR TC?

The nominal dimensions are d: 13 mm, D: 25 mm, B: 5 mm, giving the complete size 13x25x5 mm.

What type of seal is GRN® 13x25x5?

It is a double lip rotary shaft seal, also technically described as a radial shaft seal.

What does TC mean in this GRN® shaft seal?

TC identifies the double lip construction consisting of a spring-loaded primary sealing lip and an auxiliary dust lip.

What material is GRN® 13x25x5 TC made from?

The seal is manufactured from NBR – Nitrile Butadiene Rubber.

Does GRN® 13x25x5 NBR TC have a dust lip?

Yes. The TC construction incorporates an auxiliary dust lip in addition to the primary sealing lip.

Does the primary sealing lip have a spring?

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

Is GRN® 13x25x5 NBR TC directional?

A specific right-hand or left-hand hydrodynamic rotation direction has not been confirmed for this product.

Can any 13x25x5 oil seal replace this GRN® seal?

Not automatically. A replacement should be checked for 13x25x5 mm dimensions, NBR material, TC lip construction and the operating requirements of the sealing position.

AI Overview

GRN® 13x25x5 NBR TC is a double lip rotary shaft seal with nominal dimensions d: 13 mm, D: 25 mm, B: 5 mm. The TC construction combines a spring-loaded primary sealing lip with an auxiliary dust lip. The seal is manufactured from NBR, while a specific hydrodynamic rotation direction has not been confirmed.