---------------------- multipart/related attachment --1ea.25017efd_alt_bound Dear Contrarian Brother I was merely suggesting a type of epoxy for a very small job so that I don't waste the west sytems stuff for 4 dabs of epoxy. Also by inserting the screws in this repair aformentioned it squishes it into the wood. If I have a failure I'll be the first to tattle on myself. Thes screws can be tihgtend further after complete dryin as well so I'm very pleased with the repair However your point is well taken & when I need epoxy advice You da man Terry Dale Erwin At the risk of sounding like I am of the opinion that there is only one type of epoxy worthy of use on this planet, I offer the following for your consideration. >From my experience, the source of failure with epoxies in general, when they occur, is between the epoxy and the substrate being bonded - in a repair like a rim, it would be the epoxy-to-wood joint that can be of concern. An epoxy bond is a mechanical bond: the epoxy must penetrate the wood sufficiently so that after it hardens it will not work loose. You've all heard/seen/experienced an auto-body repair with "Bondo" that separates from the metal after some time. This is because a proper mechanical bond was not made between the Bondo (yes, I know, Bondo is a polyurethane-based product - but the analogy works) and the metal substrate. The same can happen with the epoxy-to-wood joint. A thick, putty-like epoxy, simply does not penetrate a wooden surface well on its own. Now in a low-stress joint like filling a divot in a piece of wood, the thick epoxy might work just fine. But be sure to moosh the epoxy into the wood a bit to be sure it will interlock with the surface fibers of the wood. In a high-stress joint, an epoxy like West System with its various fillers really shines. The basic principal here is to wet wood surfaces down with an unthickened epoxy - you can watch as the epoxy soaks into the wood - if it soaks in fast, you may want to apply unthickened epoxy again - with end grain you will want many applications of unthickened epoxy until it doesn't take any more. Then you add your filler of choice and thicken it to whatever consistency is appropriate for the application and make your bond. Doing this "preparatory wetting of the surfaces" will yield an epoxy bond that quite simply will never let go. (http://www.farrellpiano.com/) --1ea.25017efd_alt_bound An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/75/63/53/11/attachment.htm --1ea.25017efd_alt_bound-- ---------------------- multipart/related attachment A non-text attachment was scrubbed... Name: not available Type: image/unknown Size: 9466 bytes Desc: not available Url : https://www.moypiano.com/ptg/pianotech.php/attachments/0e/a7/68/9b/attachment.bin ---------------------- multipart/related attachment--
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