bend radius question when using Dave's sheet metal brake - Zenith Aircraft Builders and Flyers2024-03-29T08:00:03Zhttps://zenith.aero/forum/topics/bend-radius-question-when-using-dave-s-sheet-metal-brake?feed=yes&xn_auth=noI used the 3.2mm radius for a…tag:zenith.aero,2013-09-02:2606393:Comment:3087882013-09-02T20:07:44.919ZMalcolm Hunthttps://zenith.aero/profile/MalcolmHunt
<p>I used the 3.2mm radius for all up to and including .040" and for .063" bent up two thicknesses of .040" under the brake which worked great.. Using Dave's brake have made all the parts for a 601XL and most parts for a 701SP. The 7F5-3SP did beat me as it was difficult to stop the part slipping under the brake with the two thicknesses of .040" but other .063" were good.</p>
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<p>Good luck and if you take your time positioning the material under the brake you will have accurate…</p>
<p>I used the 3.2mm radius for all up to and including .040" and for .063" bent up two thicknesses of .040" under the brake which worked great.. Using Dave's brake have made all the parts for a 601XL and most parts for a 701SP. The 7F5-3SP did beat me as it was difficult to stop the part slipping under the brake with the two thicknesses of .040" but other .063" were good.</p>
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<p>Good luck and if you take your time positioning the material under the brake you will have accurate parts.</p>
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<p>Malcolm</p> Thanks for the help guys!
Miketag:zenith.aero,2013-09-02:2606393:Comment:3087282013-09-02T15:41:29.669ZMike Johnsonhttps://zenith.aero/profile/MikeJohnson
<p>Thanks for the help guys!</p>
<p>Mike</p>
<p>Thanks for the help guys!</p>
<p>Mike</p> The minimum bend radius for d…tag:zenith.aero,2013-09-02:2606393:Comment:3086432013-09-02T13:40:49.340ZJim B Belcherhttps://zenith.aero/profile/JimBBelcher
<p>The <strong><em>minimum</em></strong> bend radius for different thickness of aluminum can be found in AC43-13-1B and 2B. Copies can be downloaded here:</p>
<p><a href="http://www.faa.gov/documentLibrary/media/Advisory_Circular/AC%2043.13-2B.pdf" target="_blank">http://www.faa.gov/documentLibrary/media/Advisory_Circular/AC%2043.13-2B.pdf</a></p>
<p>and here:…</p>
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<p>The <strong><em>minimum</em></strong> bend radius for different thickness of aluminum can be found in AC43-13-1B and 2B. Copies can be downloaded here:</p>
<p><a href="http://www.faa.gov/documentLibrary/media/Advisory_Circular/AC%2043.13-2B.pdf" target="_blank">http://www.faa.gov/documentLibrary/media/Advisory_Circular/AC%2043.13-2B.pdf</a></p>
<p>and here:</p>
<p><a href="http://www.faa.gov/regulations_policies/advisory_circulars/index.cfm/go/document.information/documentid/99861" target="_blank">http://www.faa.gov/regulations_policies/advisory_circulars/index.cfm/go/document.information/documentid/99861</a></p>
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<p>Basically, the thicker the aluminum, the larger the radius you need.</p>
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<p></p> Most of the thicker parts are…tag:zenith.aero,2013-09-01:2606393:Comment:3085422013-09-01T20:15:24.508ZGary Lee Weberhttps://zenith.aero/profile/GaryLeeWeber
<p>Most of the thicker parts are smaller brackets and such. I made a hardwood block with the proper radius on the edge. I sandwich the part blank between two blocks and line up the edge of the block with the bend line. Once clamped firmly in the vice, I simply bend the part to the proper angle using a mallet. I've made the elevator control horns and center hinge brackets like this and they have turned out well.</p>
<p>Most of the thicker parts are smaller brackets and such. I made a hardwood block with the proper radius on the edge. I sandwich the part blank between two blocks and line up the edge of the block with the bend line. Once clamped firmly in the vice, I simply bend the part to the proper angle using a mallet. I've made the elevator control horns and center hinge brackets like this and they have turned out well.</p> I believe that you bend all t…tag:zenith.aero,2013-09-01:2606393:Comment:3086782013-09-01T15:18:58.213ZJesse Hartmanhttps://zenith.aero/profile/JesseHartman
<p>I believe that you bend all the same radius until you get up to the .063 and up. That what I do. My brake is build with a 3.2mm radius</p>
<p>I believe that you bend all the same radius until you get up to the .063 and up. That what I do. My brake is build with a 3.2mm radius</p>