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Post by vance on Jan 30, 2021 9:38:22 GMT -8
I got some Hope-Page parts in a lot of other stuff. Unfortunately, there aren't enough parts for a complete mouthpiece, but I think something can be done about that down the road. These things are cast plastic, including the very fine threads that hold it together. Time and saltwater do their thing on these threads, especially on the exhaust side, for some reason, making them brittle and subject to breaking. It is very easy to brutalize the starting threads when trying to engage them with the retaining rings. On this one, the ring would only engage about the last 1/6" of threads. It would tighten down, but it was not rugged enough for use. The threads on the outside end were nearly gone. I decided to try a repair with JBWeld, using a greased ring as a mold for new threads. I did two layers, and may attempt a third. Even though the ring engages quite well and can be tightened down pretty aggressively, there are still some places where the JBWeld isn't forming perfect threads. This is only an aesthetic issue, and I might do something I have a lot of difficulty doing: leave well enough alone.
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Post by nikeajax on Jan 30, 2021 11:04:54 GMT -8
When I do this, I like to use clear epoxy, as it's not as noticeable. Make very sure to use silicone grease inside the ring. I also leave a small gap between the ring and the body that I can run my thumbnail or something else in between so as to lessen the likelihood of permanently affixing the ring on. After about ten minutes work the ring back and forth to keep from the aforementioned getting stuck: keep doing this for about 1/2 hour then remove the ring and let it sit over night. Grease the ring again and continue working the ring until it moves freely. Anyway, that's my method, JB
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Post by herman on Jan 30, 2021 13:15:01 GMT -8
You have a lathe, why not build up the threads with something...JB weld or epoxy...and then turn new ones? If you get it set up right before applying the JB/epoxy you could recut them in the same grooves. For practice, get some PVC couplings and do it to them before doing the HP. I have practiced on a lot of PVC before cutting expensive material.
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Post by vance on Jan 30, 2021 14:35:20 GMT -8
You have a lathe, why not build up the threads with something...JB weld or epoxy...and then turn new ones? If you get it set up right before applying the JB/epoxy you could recut them in the same grooves. For practice, get some PVC couplings and do it to them before doing the HP. I have practiced on a lot of PVC before cutting expensive material. I'd do that if I had one that was very damaged. It will take making a fixture to hold the mouthpiece, and I just didn't want to go to the trouble for a one-off. I didn't care about the color difference, since the difference can't be seen when the mouthpiece is assembled. Supposedly JBWeld has added materials for more strength so it might be better than plain epoxy.
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Post by vance on Jan 30, 2021 16:55:08 GMT -8
This reminds me that I should finish my pvc plumbing parts mouthpiece. I have everything done except for one more hose connector tube and paint. I'll paint it Mistral yellow, I think. Photos to follow.
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Post by nikeajax on Jan 30, 2021 17:30:09 GMT -8
Anyone who owns a HP should recognize this color: Yep, it's a Western Electric 500-series telephone, made out of the same stuff JB
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Post by vance on Jan 31, 2021 17:43:57 GMT -8
It looks to me that a badly damaged H-P with no viable threads could be repaired with plumbing parts.
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