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Please help with bent bronze marine parts

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发表于 2021-8-31 23:37:49 | 显示全部楼层 |阅读模式
Hi, I'm sure there is enough knowledge here to help with this question.  A customer of mine was running his recently restored Century and hit an underwater rock/log.  He bent the shaft, the rudder, the strut, and destroyed his prop.  All parts are bronze.  The shaft and prop are being replaced.  The rudder and strut seem as though they could be heated and bent back, although I don't know and am here to find out. The rudder can actually be replaced easily so not as much concern.  The strut can be ordered, but most likely the mounting base will be completely different. It would be nice to try and reuse the original if possible.  What do you think?  Also, if this is something you could do, please pm me and we could discuss a price. Thanks! Attached Images
Reply:Post on this board:www.aomci.orgThere is a ton of knowledge about old motors, boats, and boat related stuff.
Reply:Here’s where I’d direct your customer as this would not be his first rodeo. http://turnwrightmachineworks.com/Everlast PowerPro 256, Everlast W300 Cooler, Everlast Cart 250Millermatic 211, Spoolgun 100, Miller HD CartJackson W60 Truesight Digital Auto Darkening, Victor 315 Torch sitting on a Harper 830-86 cart
Reply:Thanks guys, www.aomci.org
Reply:There are dozens of different "bronze" alloys. You need to figure out what this one is.Some bronze can easily be heated and bent. Some bronze tig welds like a dream. Some can be forged. And some is a real pain to work with.Most likely very gentle heat, like below 500 degrees, would help in straightening this. DO NOT get it red, or orange. Even in a dark room, that amount of heat can be dangerous.I have forged a variety of bronze alloys in my propane forge- some work great, if you know what you are doing. Some are really really easy to ruin.
Reply:Ries,Thanks. I can't be sure what alloy it is. The bronze I get now is usually silicon bronze.Usually, back when these were made they talked about tobin bronze or naval bronze.
Reply:Could be silly bronze. That is usually a dark brownish red color.Silicon Bronze will bend cold or hot. I bend it cold on the hossfeld up to about 1 1/2" round. I bend it warmish too. And I forge a lot of it- but you shouldnt need to forge this.Silicon Bronze tig filler rod is easy to get, and it welds really nicely.If it is something else, and it has zinc or particularly lead in it, it will bubble and pop when you try to tig weld it.
Reply:The guys at Wooden Boat Forum might be able to offer good advice.http://forum.woodenboat.com/forumdis...uilding-Repair
Reply:straighten in a press. no heat. have done several of these. also check on 31 bertram.com                    hope this helps rod
Reply:Originally Posted by rodweldstraighten in a press. no heat.
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