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If you are going to drill the copper, you might consider modifying a drill bit to be more suitable for the operation. Have a look:</div>
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<a href="https://www.youtube.com/watch?v=pAngKHIZgyA" id="LPlnk">https://www.youtube.com/watch?v=pAngKHIZgyA</a><br>
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If you are going to cut the sphere, you can get quite far with a hacksaw. Cut around so the final break is in the middle. Then it's not that difficult to sand flat the flat portion of the half sphere.</div>
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cheers,</div>
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Cosmin</div>
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<a target="_blank" id="LPUrlAnchor845298" href="https://www.youtube.com/watch?v=pAngKHIZgyA" style="text-decoration: none; color: var(--themePrimary);">Spare parts #7 - Modifying A Twist Drill For Drilling Brass</a></div>
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Modifying A Twist Drill For Drilling Brass, by Clickspring Drilling brass with a standard twist drill carries a hazard with it, that can be easily avoided with a simple modification to the drill bit. Its simple, fast and very effective. The main project video
that this video is related to is "How To Make A Clock In The Home Machine Shop - Part ...</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Woodworkers <woodworkers-bounces@lists.sawdusters.org> on behalf of Greg via Woodworkers <woodworkers@lists.sawdusters.org><br>
<b>Sent:</b> Tuesday, March 30, 2021 9:24 PM<br>
<b>To:</b> Sawdusters <woodworkers@sawdusters.org><br>
<b>Cc:</b> Greg <dasnipa@gmail.com><br>
<b>Subject:</b> Re: [Woodworkers] Copper metal working</font>
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<div dir="auto">How about a homemade extruder?</div>
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<div dir="ltr" class="x_gmail_attr">On Tue, Mar 30, 2021, 5:23 PM Jason Beam via Woodworkers <<a href="mailto:woodworkers@lists.sawdusters.org">woodworkers@lists.sawdusters.org</a>> wrote:<br>
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<div bgcolor="#FFFFFF">I like this suggestion of drilling on the lathe a lot more. The grabbiness of the copper is a lot less of a factor when you're feeding with the tailstock of a lathe.
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<div>Jason Beam<br>
<b><a href="https://beamerweb.com" target="_blank" rel="noreferrer">Beamer's Brands</a></b><br>
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<div>On 3/30/2021 2:18 PM, Richard Allen via Woodworkers wrote:<br>
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<div dir="ltr">I have turned copper on a wood lathe before. I would take a 7/8” rod about 2” long an turn a sphere at one end. The end being held by the lathe could be turned down to a suitable diameter so the sphere would be attached to the rod as a single
piece of copper. Another option would be to drill and tap the 1” sphere and thread some of your 3/8” rod to screw into the taped sphere. Copper drills fine. Plan on discarding the drill bit as sometimes the copper will “weld” to the drill bit. I would
do the drilling with the 1” sphere in a chuck on the lathe. I would turn down the 1” sphere by mounting the 3/8” rod in a chuck on the lathe. Copper turns with a scraper. It is a fairly slow process but 10 minutes of scraper work and 15 minutes of sanding
and polishing should give you a sphere shape to your likening</div>
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<blockquote type="cite">On Mar 30, 2021, at 5:02 PM, chuck.steger--- via Woodworkers
<a href="mailto:woodworkers@lists.sawdusters.org" target="_blank" rel="noreferrer">
<woodworkers@lists.sawdusters.org></a> wrote:<br>
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<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Arial",sans-serif">Hope everyone is safe and healthy!<u></u><u></u></span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Arial",sans-serif"> I need some advice on working solid copper. I’ll give you some context on what I’m doing.<u></u><u></u></span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Arial",sans-serif"> I designing and building a Heritage Box for someone. Everything that goes into the design and construction will have some elements from their cultural background. Their
mother and grandparents lived and worked in a copper mining town in Chile and copper was a big part of their lives. To bring copper into the design, I will attach the legs to the box using copper rods. Since the legs taper, I will use 1/8”, 3/16”, and ¼” rods
and leave a ¼” gap between the legs and box. But this is subtle and I wanted to add something else. So I want to add a copper sphere at the top of the box. I drew up the design full scale and the sphere looks good at ¾”. So, I started researching copper spheres
and what I found are jewelry spheres ½” and less or solid spheres 1” and greater. I ordered the 1” spheres which are actually used for plating copper.<u></u><u></u></span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Arial",sans-serif"> So here are some of my issues/questions/concerns:<u></u><u></u></span></p>
<ul type="disc" style="margin-top:0in">
<li style="margin-left:0in"><span style="font-size:12.0pt; font-family:"Arial",sans-serif">Is there any way possible to reduce the diameter? I thought about some kind of holding contraption on a lathe and then using files but that just sounds like a bad idea.<u></u><u></u></span></li><li style="margin-left:0in"><span style="font-size:12.0pt; font-family:"Arial",sans-serif">The sphere weights in at 3 oz. Now that may seem light but it’s a little heftier that I wanted because I don’t want it to tip the box over when hinged open. The box footprint
will be 8”x12” so it may be OK. I will build a prototype as I always do so I’ll find out. Also with a prototype it will be easy to see if 1” is too big. A ¾” hollow sphere would be perfect but I can’t find that.<u></u><u></u></span></li><li style="margin-left:0in"><span style="font-size:12.0pt; font-family:"Arial",sans-serif">Will solid copper drill OK? I would like to drill a hole for a rod to anchor the sphere to the box. I will epoxy the sphere to a cradle but a rod would be so much more
secure IMO. And, given the weight, I would feel better.<u></u><u></u></span></li><li style="margin-left:0in"><span style="font-size:12.0pt; font-family:"Arial",sans-serif">Here’s another take …. Is there a way to cut the sphere in ½” I only have WW bandsaws so even with a metal blade, WW bandsaws run too fast, don’t they? The thought process
here is maybe I take the two half spheres and attach them to the side of the box as an adornment. The design will be mostly Asian so spheres might look good.
<u></u><u></u></span></li></ul>
<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Arial",sans-serif"> So you can see the design is in total flux. I’ve started building the prototype out of pine.<u></u><u></u></span></p>
<p class="x_MsoNormal"><span style="font-size:12.0pt; font-family:"Arial",sans-serif"><u></u> <u></u></span></p>
<p class="x_MsoNormal"><span>Chuck<u></u><u></u></span></p>
<p class="x_MsoNormal"><u></u> <u></u></p>
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