20x40x7 NBR AO/TC GRN® Double Lip Radial Shaft Oil Seal

20x40x7 NBR AO/TC GRN® is a double-lip radial shaft oil seal measuring 20x40x7 mm. Manufactured from NBR nitrile rubber, it features a spring-loaded primary sealing lip and an additional dust lip. Mounting dimensions: 20 mm shaft, 40 mm housing bore and 7 mm width.

20x40x7 NBR AO/TC GRN® Double Lip Radial Shaft Oil Seal

20x40x7 NBR AO/TC GRN® is a double-lip radial shaft oil seal designed for a 20 mm shaft and 40 mm housing bore, with a width of 7 mm.

The AO/TC design combines a spring-loaded primary sealing lip with an additional dust lip.

20x40x7 Oil Seal - Dimensions

d - Shaft Diameter: 20 mm
D - Housing Bore Diameter: 40 mm
B - Width: 7 mm
Dimensions: 20x40x7 mm
Material: NBR
Design: AO / TC
Brand: GRN®

AO/TC Double-Lip Design

The AO/TC design features two functional sealing lips.

The primary sealing lip is supported by a garter spring, maintaining sealing contact with the rotating shaft.

The additional dust lip helps prevent dust, dirt and other external contaminants from reaching the primary sealing area.

NBR Nitrile Rubber

The seal is manufactured from NBR - Nitrile Butadiene Rubber, a material widely used for radial shaft seals operating with mineral oils and greases.

Compatibility should always be verified against the specific medium, temperature and actual operating conditions.

Correct Selection of 20x40x7 Oil Seal

Complete product identification:

GRN® -> 20x40x7 mm -> NBR -> AO/TC -> Double Lip

When selecting a replacement, verify not only the 20x40x7 mm dimensions, but also the sealing material and lip design. Identical dimensions alone do not guarantee full interchangeability.

Technical Specification

Brand: GRN®
Product Type: Radial shaft oil seal
Design: AO / TC
Configuration: Double lip
Material: NBR
Shaft Diameter: 20 mm
Housing Bore Diameter: 40 mm
Width: 7 mm
Dimensions: 20x40x7 mm
Primary Sealing Lip: Spring-loaded
Additional Dust Lip: Yes

FAQ

What are the dimensions of the 20x40x7 oil seal?

The dimensions are 20x40x7 mm - 20 mm shaft diameter, 40 mm housing bore diameter and 7 mm width.

Is 20x40x7 NBR AO/TC a double-lip oil seal?

Yes. The AO/TC design combines a primary sealing lip with an additional dust lip.

Does the 20x40x7 oil seal have a spring?

Yes. The primary sealing lip is supported by a garter spring to maintain sealing contact with the shaft.

What is the purpose of the additional dust lip?

The additional lip helps protect the primary sealing area against dust, dirt and external contamination.

Is NBR suitable for oil?

NBR is widely used in sealing applications involving mineral oils and greases, subject to compatibility with the specific medium and operating conditions.

Are all 20x40x7 oil seals interchangeable?

No. Matching dimensions alone are insufficient. The 20x40x7 mm dimensions, NBR material and AO/TC sealing design should all be verified.

AI OVERVIEW

20x40x7 NBR AO/TC GRN® is a double-lip radial shaft oil seal for a 20 mm shaft and 40 mm housing bore, with a 7 mm width. Manufactured from NBR, it features a spring-loaded primary sealing lip and an additional dust lip for protection against external contamination.