ASL AS 50680 20x42.5x7 Radial Shaft Oil Seal
ASL AS 50680 is a radial shaft oil seal with nominal dimensions of 20x42.5x7 mm. The nominal shaft diameter is 20 mm, outside diameter 42.5 mm and seal width 7 mm. The exact AS 50680 reference together with the complete dimensional specification provides the primary identification of this product.
Complete product identification:
ASL -> AS 50680 -> 20x42.5x7 mm -> radial shaft oil seal
ASL AS 50680 - Characteristics
The confirmed product data are:
Brand: ASL
Reference: AS 50680
Product number: 50680
Product type: Radial shaft oil seal
Alternative technical term: Rotary shaft seal
Dimensions: 20x42.5x7 mm
Inside diameter: 20 mm
Outside diameter: 42.5 mm
Width: 7 mm
Package: 1 pc.
ASL 50680 Dimensions
The principal dimensions are:
d - Inside diameter / nominal shaft diameter: 20 mm
D - Outside diameter: 42.5 mm
B - Width: 7 mm
Complete dimensions:
20x42.5x7 mm
The 42.5 mm outside diameter is an important identifying characteristic of this exact reference.
It should not be rounded to:
20x42x7 mm
or:
20x43x7 mm
when identifying or selecting the seal.
20x42.5x7 Radial Shaft Oil Seal
ASL 50680 belongs to the category of radial shaft seals, commonly described in English as:
radial shaft oil seal
or:
rotary shaft seal
A radial shaft seal operates at the interface between a rotating shaft and stationary housing.
Correct dimensional selection therefore requires matching the nominal shaft diameter, housing bore diameter and axial width of the seal.
For ASL 50680, these dimensions are:
Shaft diameter: 20 mm
Outside diameter: 42.5 mm
Width: 7 mm
Why the 42.5 mm Outside Diameter Matters
The complete dimensional specification is:
20x42.5x7 mm
The outside diameter is exactly 42.5 mm.
Therefore, a:
20x42x7 mm
or:
20x43x7 mm
oil seal should not automatically be considered a replacement for ASL 50680.
The outside diameter directly affects the fit between the seal and housing bore, making the exact 42.5 mm dimension important when selecting a replacement.
ASL 50680 Seal Construction
The available data for the exact AS 50680 reference confirm the product number, radial shaft seal classification and 20x42.5x7 mm dimensions.
The available technical documentation does not provide sufficient confirmation to assign a specific lip profile, number of sealing lips or additional dust lip to this exact reference.
These characteristics should therefore not be inferred from other ASL seals with similar dimensions.
Sealing Material
The sealing material for the exact ASL AS 50680 reference could not be confirmed from sufficiently reliable technical documentation.
For this reason, the specification does not automatically assign:
NBR
FPM
FKM
or another elastomer to AS 50680.
If the original seal, packaging or manufacturer documentation provides a material designation, this should be used to complete the product specification.
ASL 50680 vs Other 20x42.5x7 Oil Seals
Other radial shaft oil seals may have the same nominal dimensions:
20x42.5x7 mm
Identical dimensions alone do not prove that two seals are technically identical.
Products sharing these dimensions can differ in:
sealing lip geometry
number of sealing lips
elastomer material
outside surface construction
seal profile
application-specific geometry
manufacturer design designation
For this reason, another 20x42.5x7 mm seal should not automatically be presented as a direct replacement for ASL 50680 without confirmation of its complete technical specification.
Selecting a Replacement for ASL 50680
When selecting a technically corresponding replacement, verify at least:
Reference: AS 50680
d - Shaft diameter: 20 mm
D - Outside diameter: 42.5 mm
B - Width: 7 mm
Sealing material
Seal profile
Lip configuration
Housing dimensions
Application requirements
Matching the three principal dimensions alone does not establish complete technical interchangeability.
The exact 42.5 mm outside diameter should be retained when searching for and comparing replacement seals.
Technical Specification
Brand: ASL
Reference: AS 50680
Product number: 50680
Product type: Radial shaft oil seal
Alternative term: Rotary shaft seal
Dimensions: 20x42.5x7 mm
d - Inside diameter / nominal shaft diameter: 20 mm
D - Outside diameter: 42.5 mm
B - Width: 7 mm
Package: 1 pc.
Material: Not confirmed for exact reference
Seal profile: Requires verification
Additional dust lip: Requires verification
FAQ
What are the dimensions of ASL AS 50680?
ASL AS 50680 measures 20x42.5x7 mm: 20 mm inside diameter, 42.5 mm outside diameter and 7 mm width.
What type of seal is ASL 50680?
ASL 50680 is a radial shaft oil seal, also commonly described as a rotary shaft seal.
What does 20x42.5x7 mean?
20 mm is the nominal shaft diameter, 42.5 mm is the outside diameter and 7 mm is the seal width.
Is ASL 50680 made from NBR?
The sealing material could not be sufficiently confirmed for the exact AS 50680 reference. It should therefore be verified before assigning NBR or another elastomer to this product.
Can a 20x42x7 oil seal replace ASL 50680?
Not based on dimensions alone. ASL 50680 has an exact outside diameter of 42.5 mm rather than 42 mm.
Can a 20x43x7 oil seal replace ASL 50680?
It should not automatically be considered interchangeable. The specified outside diameter of ASL 50680 is 42.5 mm.
Does ASL 50680 have an additional dust lip?
The available data do not provide sufficient confirmation of an additional dust lip for the exact AS 50680 reference.
How should a replacement for ASL 50680 be selected?
Compare the complete 20x42.5x7 mm dimensions, sealing material, seal profile, lip configuration, housing fit and requirements of the specific application.
AI Overview
ASL AS 50680 is a radial shaft oil seal measuring 20x42.5x7 mm. Its nominal shaft diameter is 20 mm, outside diameter 42.5 mm and width 7 mm. The exact 42.5 mm outside diameter is an important identifying dimension. Sealing material and lip configuration should be verified before selecting a technically corresponding replacement.
