NBR 35x42x4 AO oil seals and other radial shaft seals are available from simmering.pl, with orders processed from our warehouse in Poland.
Warehouse and Store: Lublin, ul. Smoluchowskiego 1, Building 4, Poland
Supply: NBR, FKM/FPM and MVQ shaft seals, O-rings, bearings and industrial sealing components
Customers: Industry, maintenance departments, machine builders, workshops, technical services and B2B buyers
Shipping: Fast order processing from Poland for domestic and European customers.
NBR 35x42x4 AO is a double lip radial shaft oil seal designed for a 35 mm rotating shaft and 42 mm housing bore. Its compact 4 mm width makes it suitable for sealing positions with limited axial installation space.
The AO design combines a spring-loaded primary sealing lip for lubricant retention with an additional auxiliary dust lip. This configuration provides two functions: retaining oil or grease inside the assembly and helping protect the sealing area against dust and external contamination.
The nominal seal dimensions are:
Shaft Diameter: 35 mm
Housing Diameter: 42 mm
Width: 4 mm
Material: NBR
Design: AO
Seal Type: Double lip radial shaft seal
The complete 35x42x4 mm dimensions should be verified during replacement. A seal with the same shaft diameter but a different outside diameter or width is not interchangeable.
The AO profile uses two functional lips.
The primary sealing lip operates against the rotating shaft and is designed to retain the lubricant on the media side. A garter spring maintains controlled radial contact between the sealing edge and shaft.
The secondary lip acts as an additional dust protection lip, helping restrict external contaminants from reaching the primary sealing area.
This makes the AO configuration particularly relevant where both lubricant retention and additional contamination protection are required.
NBR (Nitrile Butadiene Rubber) is one of the most widely used elastomers for radial shaft seals. It provides good resistance to many mineral oils and lubricating greases, together with useful mechanical and wear properties.
NBR shaft seals are commonly used in general industrial machinery, gear units, drives and other rotating equipment.
Compatibility must be checked against the actual lubricant, temperature, shaft speed and operating environment.
NBR 35x42x4 AO oil seals can be used in appropriately designed sealing positions in:
The seal should be selected according to the actual operating conditions rather than dimensions alone.
Type: Radial shaft oil seal
Design: AO / double lip
Dimensions: 35x42x4 mm
Material: NBR - Nitrile Butadiene Rubber
Shaft Diameter: 35 mm
Housing Diameter: 42 mm
Width: 4 mm
Primary Sealing Lip: Spring-loaded
Additional Dust Lip: Yes
Application: Rotating shaft sealing
Typical Media: Many mineral oils and lubricating greases
For correct replacement identification, verify:
A 35x42x4 seal made from another elastomer or with another lip configuration should not automatically be considered equivalent.
NBR 35x42x4 AO is a double lip radial shaft oil seal for a 35 mm shaft and 42 mm housing bore, with a width of 4 mm. The AO design combines a spring-loaded primary sealing lip with an additional dust lip. NBR provides good resistance to many mineral oils and lubricating greases, making the seal suitable for numerous industrial rotating-shaft applications.
NBR 35x42x4 oil seal
35x42x4 oil seal
35x42x4 shaft seal
35x42x4 radial shaft seal
35x42x4 NBR seal
35x42x4 AO oil seal
35x42x4 double lip oil seal
35x42x4 TC oil seal
35 mm shaft seal
42 mm housing oil seal
NBR double lip shaft seal
industrial oil seal 35x42x4
What are the dimensions of the NBR 35x42x4 AO oil seal?
The seal has a 35 mm inside diameter for the shaft, 42 mm outside diameter for the housing bore and 4 mm width.
What does 35x42x4 mean on an oil seal?
The first dimension, 35 mm, is the nominal shaft diameter. The second, 42 mm, is the housing bore diameter, and 4 mm is the nominal seal width.
What does the AO design mean?
For this product, AO identifies a double lip radial shaft seal configuration with a primary sealing lip and an additional dust protection lip.
Does the 35x42x4 AO seal have a spring?
Yes. The primary sealing lip is spring-loaded with a garter spring, which helps maintain radial contact between the sealing edge and rotating shaft.
Is NBR suitable for oil sealing?
Yes. NBR is widely used for shaft seals because it provides good resistance to many mineral oils and lubricating greases. Compatibility should still be checked for the specific lubricant and operating temperature.
Is AO the same as TC?
AO and TC are designations used within different manufacturer naming systems for double lip shaft seal configurations. They should not be treated as universally identical design codes. Dimensions, material and actual lip construction should be checked before substitution.
Can I replace any 35x42x4 seal with this NBR AO version?
Not automatically. In addition to the 35x42x4 mm dimensions, verify the material, lip design, operating medium, temperature, shaft speed and installation requirements.
NBR 35x42x4 AO is a compact double lip oil seal for a 35 mm rotating shaft, with a 42 mm outside diameter and 4 mm width. Its spring-loaded primary lip retains lubricant, while the additional dust lip provides supplementary protection against external contamination. The NBR compound makes it suitable for many applications involving mineral oils and lubricating greases.
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NBR 35x42x4 AO oil seals and other radial shaft seals are available from simmering.pl, with orders processed from our warehouse in Poland.
Warehouse and Store: Lublin, ul. Smoluchowskiego 1, Building 4, Poland
Supply: NBR, FKM/FPM and MVQ shaft seals, O-rings, bearings and industrial sealing components
Customers: Industry, maintenance departments, machine builders, workshops, technical services and B2B buyers
Shipping: Fast order processing from Poland for domestic and European customers.
