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#1
posted to rec.boats.cruising
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It's the pits, man!
Well, as you know from my priors, I successfully dropped the rudder. Today I
started in on removing all the prior epoxy from my interior attempts at remediation of the many pits and fissures the rudder shaft. Once that's all out, I'll aggressively hand wire-brush the pits with acetone to clean it all for the next - and final, as the sleeves I wanted to use won't work (for technical reasons) in this application - step, which is Devcon's Plastic Steel epoxy. Consultations with Devcon reveal that this is the best product for the application, and it's very forgiving in time terms, allowing lots of work time. I will stage the application such that I can sand it "green" so that I don't have to exert so much force that I remove steel in the process. Pix of this stage begin he http://justpickone.org/skip/gallery/...+Old+Epoxy+Out L8R, y'all Skip, celebrating our 9th wedding anniversary alone tomorrow, working on the boat, while Lydia plays nursemaid to her mother's house-host, who had emergency gall bladder removal yesterday but is home, now, and her mother, recovering from a compression fracture, but doing very nicely on Reumofan Plus... -- Morgan 461 #2 SV Flying Pig KI4MPC See our galleries at www.justpickone.org/skip/gallery ! Follow us at http://groups.yahoo.com/group/TheFlyingPigLog and/or http://groups.google.com/group/flyingpiglog When a man comes to like a sea life, he is not fit to live on land. - Dr. Samuel Johnson |
#2
posted to rec.boats.cruising
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It's the pits, man!
"WaIIy" wrote in message
... On Sun, 22 Apr 2012 21:02:20 -0400, "Flying Pig" wrote: Consultations with Devcon reveal that this is the best product for the application, and it's very forgiving in time terms, allowing lots of work time. I will stage the application such that I can sand it "green" so that I don't have to exert so much force that I remove steel in the process. Are you using a sleeve after the Devcon ? No, I can't. The nature of the sleeves made by SKF require removal of the ledge they provide to tap it down into place in order for them to work for me. That would leave a gap between more than one of them. More than one of them can be used on a shaft which is too long for a single one (the max is only less than half of the area of my packing), but the usual application of that situation is where there are two seals (this product isn't designed for a packing gland). You can see some of what is involved in a dual-sleeve application he http://www.justpickone.org/skip/Prac...EDI-SLEEVE.pdf Further, the leading edge of the sleeve is chamferred; even if I did it so that two of them would butt, with the ledges removed top and bottom of the pair I'd need (possible, now that the shaft is out), there would be an uneven level made by the two chamfers butted together, or, if I did the first one with the ledge up, a flat against a chamfer. My packing is 1" or more (4 or 5 rings of 5/16"); even only 3 rings would be more than a single 0.875 length sleeve, which would have to be very exactly placed if it were long enough. That's disappointing, but I really don't expect any challenges, once it's applied and leveled to the dimension of the steel shaft. I suspect that there has been some wear over the years, but I don't expect the packing would notice a few thousandths diminishments, so long as it was round. It's that part which will have my very full attention as I finish it out. I'm mulling how I can have a very hard, straight, sanding, bridging the packing area, going up and down the shaft, which isn't diminished from the original 2", I don't think, above and below the packing area, leaving the part in between not only perfectly round but also out to full spec on the shaft. Like in my fairing on the hull, the sandpaper would ride on the un-touched stainless, acting as a guide to leave the stuff in between at the same level, but being softer (sanding it "green"), when I do it, removable with little enough effort that I'm not taking off notable amounts of steel above and below that area... Per Devcon, this stuff should set to the degree it can be machined, drilled and/or tapped, so if I am comfortable that it's not going to leave (I'll try some destructive testing similar to what I'm now doing to get out the first attempts, but in an area not inside of the packing area, which is substantial, dammit) when I'm finished, I'll be happy. L8R Skip -- Morgan 461 #2 SV Flying Pig KI4MPC See our galleries at www.justpickone.org/skip/gallery ! Follow us at http://groups.yahoo.com/group/TheFlyingPigLog and/or http://groups.google.com/group/flyingpiglog When a man comes to like a sea life, he is not fit to live on land. - Dr. Samuel Johnson |
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