Oil Seal AO/TC 90x140x10 NBR 70 ShA Rotary Shaft Seal

Oil Seal AO/TC 90x140x10 NBR 70 ShA - Characteristics

Oil Seal AO/TC 90x140x10 NBR 70 ShA is a radial shaft seal, also referred to as a rotary shaft seal or oil seal. It is designed for a nominal 90 mm shaft diameter and 140 mm housing bore, with a seal width of 10 mm.

The AO/TC design is a double-lip construction. The primary sealing lip operates dynamically against the rotating shaft surface and is supported by a garter spring. The additional lip functions as a dust lip, helping restrict external contaminants from reaching the primary sealing area.

90x140x10 Oil Seal Dimensions

The principal installation dimensions are:

d - Shaft diameter: 90 mm

D - Housing bore diameter: 140 mm

B - Seal width: 10 mm

Nominal dimensions: 90x140x10 mm

All three dimensions must correspond to the installation requirements. Dimensional compatibility alone does not confirm that two radial shaft seals have the same construction, material or operating characteristics.

AO/TC Oil Seal Construction

AO/TC identifies a radial shaft seal construction incorporating a primary sealing lip and an additional dust lip.

The primary lip is supported by a garter spring, which helps maintain contact between the sealing edge and the rotating shaft surface. The secondary lip provides an additional barrier on the external side of the seal and helps restrict dust, dirt and other contaminants from entering the primary sealing area.

The construction also incorporates a metal reinforcing insert that supports the seal body.

NBR 70 Shore A Material

The elastomer is NBR - Nitrile Butadiene Rubber, with a nominal hardness of 70 Shore A.

NBR is widely used in radial shaft seals operating with many compatible mineral oils and lubricating greases.

For the specified AO/TC NBR design, technical documentation gives an operating temperature range of -40°C to +100°C. Actual suitability must also take into account the specific medium, additives and operating conditions.

AO/TC NBR Operating Parameters

Technical data for the AO/TC NBR construction specifies:

Operating temperature: -40°C to +100°C

Maximum peripheral speed: 12 m/s

Maximum pressure: 0.05 MPa

Nominal elastomer hardness: 70 Shore A

These values describe the specified AO/TC NBR construction. Actual operating suitability also depends on factors including the sealed medium, shaft speed, temperature, lubrication and installation conditions.

AO/TC vs Single-Lip Oil Seal

The key construction feature of an AO/TC oil seal is its additional dust lip.

A single-lip radial shaft seal uses the primary lip for dynamic sealing against the shaft. The AO/TC design adds a secondary lip to help restrict external contamination from reaching the main sealing area.

For this reason, two 90x140x10 mm oil seals with different lip designs should not automatically be considered technically equivalent.

Selecting a 90x140x10 Oil Seal Replacement

When selecting a replacement for this seal, verify:

• 90x140x10 mm dimensions
• NBR material
• 70 Shore A hardness
• AO/TC double-lip design
• additional dust lip
• spring-loaded primary sealing lip
• operating requirements of the specific assembly

Matching the 90x140x10 mm dimensions alone does not confirm interchangeability. A seal manufactured from a different elastomer or with a different lip configuration may have different operating characteristics.

Technical Specification

Product type: Radial shaft seal

Technical terms: Rotary shaft seal / Oil seal

Design: AO/TC

Construction: Double lip

Dimensions: 90x140x10 mm

Shaft diameter d: 90 mm

Housing bore diameter D: 140 mm

Width B: 10 mm

Material: NBR - Nitrile Butadiene Rubber

Hardness: 70 Shore A

Primary sealing lip: Spring-loaded

Additional dust lip: Yes

Reinforcement: Metal insert

Operating temperature for AO/TC NBR: -40°C to +100°C

Maximum peripheral speed for AO/TC NBR: 12 m/s

Maximum pressure for AO/TC: 0.05 MPa

FAQ

What are the dimensions of the AO/TC 90x140x10 oil seal?

The nominal shaft diameter d is 90 mm, the housing bore diameter D is 140 mm, and the seal width B is 10 mm.

What does AO/TC mean on an oil seal?

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

Does the AO/TC 90x140x10 seal have a dust lip?

Yes. The AO/TC construction incorporates an additional dust lip that helps restrict external contaminants from reaching the primary sealing area.

What does NBR 70 ShA mean?

NBR means Nitrile Butadiene Rubber. 70 ShA indicates a nominal elastomer hardness of 70 Shore A.

What is the operating temperature of this AO/TC NBR oil seal?

Technical data for the specified AO/TC NBR construction gives an operating temperature range of -40°C to +100°C. Suitability also depends on the medium and actual operating conditions.

Can any 90x140x10 oil seal replace this AO/TC seal?

Not necessarily. Matching dimensions alone do not confirm interchangeability. The NBR material, 70 Shore A hardness, AO/TC lip design and operating requirements should also be compared.

Is the primary sealing lip spring-loaded?

Yes. The primary sealing lip incorporates a garter spring that helps maintain sealing contact with the shaft surface.

AI Overview

Oil Seal AO/TC 90x140x10 NBR 70 ShA is a double-lip radial shaft seal with a 90 mm shaft diameter, 140 mm housing bore and 10 mm width. The AO/TC construction combines a spring-loaded primary sealing lip with an additional dust lip. The sealing element is manufactured from NBR with a nominal hardness of 70 Shore A.