Nitrile Rubber O Ring Cord 25.4mm Diameter (Black, 70 Duro, Per Metre)
Precision rubber cord for making general purpose O Rings
All Prices Include GST.
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Nitrile O Ring Cord Range.
- Precision extruded rubber cord for manufacturing O rings and seals
- Excellent resistance to hydrocarbon fuels, greases, water and mineral oil based fluids
- Good mechanical properties, flexibility and very easy to work with
Nitrile Rubber O Ring Cord is one of the most commonly used materials for making custom sized O rings. This particular cord is extruded from 70 Durometer Nitrile Rubber Compound which is also often referred to as NBR (Nitrile Butadiene Rubber).
Nitrile Rubber is often used because of its combination of resistance to hydrocarbon fuels, mineral oils and greases as well as its excellent flexibility and sealing performance. This cord can be easily shaped and provides good, long lasting seal performance.
O Ring Cord is a simple, round, rubber extrusion. It is usually cut to length with both ends then joined with a super glue (or another adhesive) to make an O Ring. This is often done when custom sized O rings are urgently required or when the size of the ring makes arranging a fully moulded O Ring impractical.
O Rings made using our Nitrile Rubber O Ring Cord will exhibit the sealing capabilities of the nitrile rubber. Thus, you can expect them to withstand temperatures between -20°C and +90°C and offer excellent resistance to fuels, mineral oil based fluids, greases and water. Nitrile is typically not used for sealing aromatic hydrocarbons or brake fluid.
One thing to be aware of when making O rings with Nitrile or any other material, the O Ring will only be as strong as its weakest point; which is often the adhesive join. We’re pleased to be able to offer a complete range of high quality, German-engineered super glues to use to make strong, high performance O Rings.
For Nitrile O Ring Cord, top picks include VA 30 Rubber Filled Super Glue and VA 8406 Industrial Strength Super Glue. Both will create a join that has a strength rating above material fracture point (which means the O Ring Cord will break before the adhesive join does). More information on these and the other quality cyanoacrylate adhesives in our range is available here.
|Polymer||NBR (Nitrile Butadiene Rubber)|
|Hardness||70 Shore A (+/- 5) Durometer|
|Continuous Operating Temperature||-20°C to 90°C|
|Potable Water Approved||No|
|Food Grade Approval||No|
|Hydrocarbon Fuel Resistance||Excellent|
|Dilute Acid Resistance||Good|
|Concentrated Acid Resistance||Poor|
|Aromatic Hydrocarbon Resistance||Poor|
|Brake Fluid Resistance||Poor|
Cross Sectional Tolerances for Nitrile Rubber O Ring Cord (70 Duro)
We are pleased to offer Nitrile O Ring Cord manufactured in accordance with RMA Class E1 High Precision Tolerance requirements. This is the highest standard for O Ring Cord Tolerances which ensures that your O Ring Cord will be properly sized to meet the needs of your application.
|Cord Diameter (mm)||Tolerance (mm)||Cord Diameter (Inch)||Tolerance (Inch)|
|0.0 - 1.5||± 0.15||0.000 - 0.060||± 0.006|
|1.5 - 2.5||± 0.20||0.060 - 0.100||± 0.008|
|2.5 - 4.0||± 0.25||0.100 - 0.160||± 0.010|
|4.0 - 6.3||± 0.35||0.160 - 0.250||± 0.014|
|6.3 - 10||± 0.40||0.250 - 0.390||± 0.016|
|10 - 16||± 0.50||0.390 - 0.630||± 0.020|
|16 - 25||± 0.70||0.630 - 0.980||± 0.027|
|Unit Of Measure||m|