GRN® 50x85x10 NBR TC Double Lip Rotary Shaft Seal

GRN® 50x85x10 NBR TC Double Lip Rotary Shaft Seal

GRN® 50x85x10 NBR TC is a double lip radial shaft seal / rotary shaft seal / oil seal with nominal dimensions of 50x85x10 mm, manufactured from NBR - Nitrile Butadiene Rubber. The TC configuration combines a spring-loaded primary dynamic sealing lip with an additional auxiliary dust lip.

Principal dimensions:

d: 50 mm

D: 85 mm

B: 10 mm

Complete product identification:

GRN® + 50x85x10 mm + NBR + TC

GRN® 50x85x10 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: 50x85x10 mm

Shaft diameter d: 50 mm

Outside diameter D: 85 mm

Width B: 10 mm

Primary sealing lip: Spring-loaded

Additional lip: Auxiliary dust lip

For precise identification, retain:

GRN® + 50x85x10 + NBR + TC

GRN® 50x85x10 Dimensions

The nominal installation dimensions are:

d: 50 mm - nominal shaft diameter

D: 85 mm - nominal outside diameter / housing bore diameter

B: 10 mm - nominal axial width

Complete dimensions:

50x85x10 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 the corresponding housing bore.

The third dimension specifies the nominal axial width.

All three dimensions should be verified when identifying or selecting a replacement.

TC Double Lip Seal Design

The English design designation used for this GRN® product is:

TC

The TC configuration incorporates:

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

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

Auxiliary dust lip - provides an additional external barrier protecting the primary sealing zone against contamination.

This configuration is therefore described as a:

TC double lip radial shaft seal

TC double lip rotary shaft seal

or

TC double lip oil seal

How Does the GRN® 50x85x10 TC Seal Work?

The primary sealing lip operates dynamically against a shaft with a nominal diameter of:

50 mm

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

The auxiliary lip provides an additional barrier against contaminants entering the primary sealing zone from the external side.

The primary and auxiliary lips therefore perform different functions within the sealing arrangement.

No left-hand or right-hand hydrodynamic direction is assigned to this exact GRN® product 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, material is an integral part of the exact identification:

50x85x10 + NBR + TC

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

Without exact product-specific documentation, fixed values should therefore 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 50x85x10 NBR TC Mean?

The designation can be interpreted as follows:

50 - nominal shaft diameter in mm

85 - nominal outside diameter in mm

10 - nominal axial width in mm

NBR - Nitrile Butadiene Rubber

TC - double lip seal design

GRN® - product brand

Complete identification:

GRN® + 50x85x10 + NBR + TC

Why Is the 50 mm Shaft Diameter Important?

For this product:

d: 50 mm

The primary dynamic sealing lip is designed to operate against a shaft corresponding to this nominal diameter.

A shaft seal should not be identified from the outside diameter alone.

The complete:

50x85x10 mm

dimension is required for correct dimensional identification.

Why Is the 85 mm Outside Diameter Important?

The nominal outside diameter is:

D: 85 mm

This corresponds to the nominal housing bore diameter for the seal.

Other seals designed for a 50 mm shaft may have different outside diameters.

Matching the shaft diameter alone therefore does not establish dimensional interchangeability.

Why Is the 10 mm Width Important?

The nominal axial width is:

B: 10 mm

This is the third principal dimensional parameter.

A 50x85x10 seal should be distinguished from variants such as:

50x85x8

50x85x12

or other widths, even when the shaft and outside diameters are identical.

The complete dimensional specification should always be retained:

50x85x10 mm

GRN® 50x85x10 vs 50x85x12

The two dimensions share:

d: 50 mm

D: 85 mm

but differ in axial width:

50x85x10: B: 10 mm

50x85x12: B: 12 mm

The width difference is 2 mm.

They should therefore be treated as separate dimensional variants.

GRN® 50x85x10 vs Other 50 mm Shaft Seals

A nominal 50 mm shaft diameter alone does not identify a radial shaft seal.

Other products may share:

d: 50 mm

while differing in:

outside diameter

axial width

material

lip configuration

hydrodynamic features

or

manufacturer-specific profile

For this product, the complete technical identification is:

GRN® + 50x85x10 + NBR + TC

Selection and Interchangeability

When selecting a replacement for GRN® 50x85x10 NBR TC, verify at least:

• Shaft diameter d: 50 mm
• Outside diameter D: 85 mm
• Width B: 10 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.

When comparing this product with CORTECO, SKF, Simrit or another manufacturer's seal, the actual material, lip construction, directional features and application requirements should also be verified.

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

Technical Specification

FAQ

What are the dimensions of GRN® 50x85x10 NBR TC?

The nominal dimensions are 50x85x10 mm, with a 50 mm shaft diameter, 85 mm outside diameter and 10 mm axial width.

Is GRN® 50x85x10 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® 50x85x10 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 50x85x10 mean?

It specifies a 50 mm nominal shaft diameter, 85 mm outside diameter and 10 mm axial width.

Can a 50x85x12 seal replace 50x85x10?

Direct interchangeability should not be assumed. Although both nominal diameters are identical, their axial widths differ by 2 mm.

Is GRN® 50x85x10 TC directional?

No specific left-hand or right-hand hydrodynamic direction has been confirmed for this exact GRN® product.

What is the operating temperature range of GRN® 50x85x10 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® 50x85x10 NBR TC is a double lip rotary shaft seal with a nominal 50 mm shaft diameter, 85 mm outside diameter and 10 mm axial width. Manufactured from NBR, the TC design combines a spring-loaded primary sealing lip with an auxiliary dust lip. The complete 50x85x10 mm dimensions are essential when selecting a replacement.