AS-326 NBR 70 O-Ring: Sealing for CNC Machine Tools, Lathes & Milling

1. NBR 70 Shore A O-Ring Performance Specifications

Nitrile rubber (NBR), also known as Buna-N, is one of the most commonly used sealing elastomers due to its resistance to petroleum-based fuels and lubricants. NBR 70 Shore A is the standard hardness for most industrial applications. It offers excellent compression set, tear, and abrasion resistance. The nitrile specifications for NBR 70 typically include a temperature service range of -40°C to +120°C. It is the core component of any nbr o ring kit because it is reliable and cost-effective for static and dynamic sealing.

2. CNC, Lathe, and Milling Machine Working Conditions

In the machining industry,CNC Machine Tools,Lathes, and Milling Machines operate under constant exposure to high-pressure coolants and lubricating oils. Seals in these machines must prevent "coolant ingress" which can damage sensitive internal components. The working environment involves high-speed rotational friction and hydraulic pressure spikes.Buna-n o-rings nbr nitrilematerials are selected here because they do not swell or degrade when in contact with standard cutting fluids. Without a proper as 568 o ring seal, hydraulic tool changers and spindle heads would lose pressure, leading to machining errors.

3. AS-326 Size Chart & Dimensions

The AS-326 size is specifically designed for larger mechanical fittings and hydraulic flanges within the AS 568 o ring size chart.

Conclusion

For maintenance of heavy-duty machining centers, the as-326 o ring provides the necessary cross-sectional thickness to bridge gaps in hydraulic housings. Always ensure your o-ring nbr 70 shore neutral specifications match the OEM requirements to prevent premature seal failure.