1. #1
    Ok for all you engineers out there.

    I have two O-rings one id 6mm & 2mm cross section and another id 7mm & 1.5 cross section.

    I have a bore of 10mm and a piston 9.96mm. What size groove do I need in the piston for hydraulic dynamic use (this is for a powered draw bar) the piston will move about 7mm in the bore.
    The more you know, The better you know, How little you know

  2. Hi Clive
    Information should be in there .

  3. #3

    I design pressure systems up to 30ksi. For up to 15ksi, the starting point is the Parker catalogue:


    In most cases, imperial o-rings are easier to source but there is always a metric equivalent.
    Machine tools and 3D printing supplies. Expanding constantly.

  4. The Following User Says Thank You to komatias For This Useful Post:

  5. #4
    Mike & George Many thanks for the homework you have provided for me. I have found this as well https://oringcalculator.eriksgroup.com/# but I can't seem to get the answer from it. So I will sit down and bang my head against the wall for a bit
    The more you know, The better you know, How little you know

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