X-ring 1.78x1.78 NBR70

Hardness [ShA]
70
Material
NBR
Temperature range [ºC]
-30
to
100
SKU: C371818-0 Category:
Featured properties:
High resistance to oils, petrol and other petroleum products and greases, good resistance to heat and chemicals

Product: X-ring

X-rings are double-action seals with four lips that have a square like cross-section. Due to its unique X-shape, the pressure is distributed in a superior way, which in turn provides better sealing and lower friction in comparison to the O-rings. X-rings are generally preferred for dynamic applications where less abrasion is favoured.

Material: NBR

NBR has excellent oil resistance thanks to the polar nitrile functionalities along the polymer chain. NBR is usually preferred for applications involving exposure to oil, fat, grease, and fuel due to its excellent resistance to non-polar fluid as well as to wear. The service temperature range of NBR is typically between -30 to 90ºC.

Resistances

Abrasion

3

Fire

1

Oil and fuel

3-4

Ozone

1-2

Oxidations

2-3

Water

3-4
Resistance Grades
5
Excellent
4
Very good
3
Good
2
Fair
1
Bad
Technical data sheets

Dimensions

Inner diameter (d1)

1.78
mm

Cross section (d2)

1.78
mm

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Sigma specializes in the manufacturing and subcontracting of polymer solutions in rubber, silicone, and polyurethane, as well as bonding of these materials to metals and plastics. At Sigma, we are a team of dedicated experts who love turning ideas into solutions in polymer innovation with a strong focus on our customers.
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