[PSUBS-MAILIST] strain relief

[Rick Patton via Personal_Submersibles]

Hank

If I could put the fittings in a vice or milling machine, it would be a no
brainer but these are already welded into the hull and so would have to be
drilled out free hand with an electric 1/2" drill motor and I broke a
finger trying to enlarge a hole as the bit stopped and the motor kept
spinning and I wasn't able to let go of it fast enough. Gonna pressure test
the ones I have to see at what point they extrude the wire but I still have
to either drill out and re tap like you say or have a metric fitting welded
to the existing fittings that are already in the sub.

Rick

On Tue, Dec 1, 2020 at 2:54 PM hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Rick,
> Drill them out to the closest size and thread them to metric.
> Hank
>
> On Tuesday, December 1, 2020, 10:33:32 AM MST, Rick Patton via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> Hank
>
> No, cost wasn't the factor, it was that I can't find a vendor who makes
> the fitting in the 1/4" NPT size ss fitting that I had machined and welded
> into the front dome years ago. 3/8" is the smallest that vendors go down
> to. All my fittings that accept a strain relief fitting except the two in
> the front are 1/2". I'll have to go back threw the prints to see where I
> would of gotten the 1/4" from as I know I wouldn't of just pulled it out of
> the air. My preference now would be a blue globe fitting as they can take
> much more pressure but they are made by a German company and only offered
> in Metric and all my existing threw hulls are a standard NPT thread.
> Rick
>
> On Tue, Dec 1, 2020 at 12:05 AM hank pronk via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Rick, I just did a google search on how well nickel stands up to salt
> water.  Turns out, it is good.  I am sure SS is better of coarse, but
> the reality of owning a P Sub is, they are not in the water much.  I
> assume you are asking because they are a lot cheaper.  Another reality
> of owning a Psub, they are expensive.  I assume you will be putting
> sacrificial anodes on the hull.  I would use them and keep an eye on them.
> I admit, I am not as concerned about this as others, that is because I am
> spoiled in fresh water.
> Hank
> On Monday, November 30, 2020, 12:51:26 PM MST, Rick Patton via
> Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>
>
> I was wondering if it was OK to use a nickel plated brass strain relief
> fitting to pass a cable through?
> Rick
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