<div dir="ltr">Quite a few years ago (when I was still a kid) I remember endeavoring to bend a curve into a piece of aluminum tubing. Dad had mentioned to me the idea of filling the tube with sand (something he had heard from someone down the line) and so I did just that: loaded the tube with as much sand as I could ram in there, capped it off and then heated the aluminum up with a torch. I had bolted a solid rubber cart wheel horizontally onto the workbench as a jig. The sand didn't help at all and this experiment failed miserably! As Alec suggests, there must be something more to this sand business. I finally resorted to investing in a conduit bender with the radius I was looking for and that did alright (but of course this was just thin-walled aluminum). <div><br></div><div>Last year Alec made me a couple of (very strong) stainless steel bumper bars for Snoopy's bow (think: SportSub) and he curved those things beautifully! ~ Doug </div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Apr 15, 2020 at 2:27 PM Alec Smyth via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="auto">Same as you, around the CT. If you need me to bend you a piece, just let me know. It’s much cheaper to ship a bit of bent tube than a bending machine!<br><br><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On Apr 15, 2020, at 2:09 PM, Rick Patton via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="ltr">Good to know as a plan B. What radius were you bending to?</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Apr 15, 2020 at 7:57 AM Alec Smyth via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="auto">Ah, I did the same at one time on Shackleton - 1” SS tubing with Swagelok fittings. The bending machine did it fine and I used the standard rollers.<div><div><br><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On Apr 15, 2020, at 1:48 PM, Rick Patton via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="ltr">I up sized the MBT vent tubing on my 350 to 1" and so I need to have it wrap around the con until it gets below the external exhaust valve and the con is 24" dia. I have the sand and the tubing already so I'll let everyone know how it comes out.<div>Those tube rollers are nice but you need a dye for ever size tube you want to roll which can get expensive unless you only roll one size all the time. </div><div>Rick</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Apr 15, 2020 at 1:47 AM Alec Smyth via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr">Ouch, I forgot you were in Hawaii. I actually can't recall what sort of jig I used because that little experiment was quite a few years ago. What I've been using in recent times is this:<div><br></div><div><a href="https://www.harborfreight.com/automotive/auto-body-trim/metalwork-tools/tubing-roller-99736.html" target="_blank">https://www.harborfreight.com/automotive/auto-body-trim/metalwork-tools/tubing-roller-99736.html</a> </div><div><br></div><div>I've been very happy with it, but it's not for small diameter work. What is it you're trying to make? <br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Apr 15, 2020 at 1:49 AM Rick Patton via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr">Did you use a rose bud and was your jig something welded to the table like flat bar or steel tabs tacked to the table close together? that was what i was thinking of doing. I hate to send it to the East coast from Hawaii if I don't have to.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Apr 14, 2020 at 5:49 PM Alec Smyth via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr">It dimpled just like it had without sand. Its a well known technique, but there must be something more to it beyond than filling the pipe with sand and blocking the ends. <div><br></div><div>:)</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Apr 14, 2020 at 11:28 PM Rick Patton via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr">Thanks Alec,<div>What happened when you tried it and did you have a good jig to bend it around?</div><div><br></div><div>Rick</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Apr 14, 2020 at 5:13 PM Alec Smyth via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr">Hi Rick,<div><br></div><div>I've attempted the sand technique with no luck. I do have a couple of simple bending machines, but if its something difficult there's an outfit in Maryland that does nothing but bending. I've used their services many times, and can't recommend them more highly. </div><div><br></div><div><a href="https://www.josephkavanaghco.com/" target="_blank">https://www.josephkavanaghco.com/</a> </div><div><br></div><div><br></div><div>Best,<br>Alec</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Apr 14, 2020 at 10:52 PM Rick Patton via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div dir="ltr">A reach out to the K-350 gang. Do any of you happen to know the total payload weight (two people) the boat is designed for with the MBT's and VBT flooded? <div>Also, has anyone hot bent SS tubing with sand im it in a tight radius before with good results? </div><div>I am going for a 25"/26" diameter.</div><div>Thanks</div><div>Hope all are doing OK with this friggin virus going around.</div><div>Rick<br><div><br></div></div></div>
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