Model Rocket Centering Rings

prusaprinters

<p>UPDATE (4/10/2019): The OpenSCAD file can now be edited and exported for laser cutting.</p> <p>UPDATE (2/23/2019): Added OpenSCAD file to allow customization.</p> <p>UPDATE (2/8/2019): Added BT-50 to BT-60 centering ring.</p> <p>These are 3D printable or laser cuttable centering rings for model rocket engines. Attach it in the same way you would attach a cardboard/balsa centering ring.</p> <p>If you need a size of ring that is not available here, please use the Customizer app or download and edit the OpenSCAD file. You can export the ring as an STL for 3D printing or an SVG for laser cutting. If you decide to laser cut a centering ring, cut from 1mm thick paperboard stock.</p> <p>NOTE: I have found that using the OpenSCAD app is much more effective than the Customizer (since Customizer is often very slow and hard to manipulate).</p> <p>Here are the outer dimension of body tubes - pulled from estesrockets.com - to aid in customizing the centering rings.</p> <p>BT-5 - Inside dimension: Outside dimension: 13.8mm</p> <p>BT-20 - Inside dimension: Outside dimension: 18.7mm</p> <p>BT-50 - Inside dimension: 24.1 mm Outside dimension: 24.8 mm</p> <p>BT-55 - Inside dimension: 32.6 mm Outside dimension: 34 mm</p> <p>BT-60 - Inside dimension: 40.5 mm Outside dimension: 42 mm</p> <p>BT-80 - Inside dimension: 65.7 mm Outside dimension: 66 mm</p> <p>Most rings are 1mm thick. If you need the ring thicker, non-uniform scale the Z axis in your slicer OR adjust the height variable in OpenSCAD.</p> <h3>Print Settings</h3> <p><strong>Printer Brand:</strong></p> <p>TEVO</p> <p class="detail-setting printer"><strong>Printer: </strong> <div><p>Tarantula</p></div> <p><strong>Rafts:</strong></p> <p>No</p> <p class="detail-setting supports"><strong>Supports: </strong> <div><p>No</p></div> <p><strong>Resolution:</strong></p> <p>0.2mm</p> <p class="detail-setting infill"><strong>Infill: </strong> <div><p>10% to 20%</p></div> <p><strong>Filament:</strong> Century 3D PLA Brown</p> <p><br/> <p class="detail-setting notes"><strong>Notes: </strong></p> </p><div><p>On a 3D printer, if you have issues with the centering rings melting due to extreme engine temperatures, try using ABS or PETG instead of PLA. Allow the ring to cool completely before removing from the printer so that the ring will not bend.</p></div> How I Designed This =================== <p><strong>Measurement</strong></p> <div><p>I used digital calipers to measure Estes centering rings. Measurements included inner diameter, outer diameter, and thickness.</p> I also checked my measurements against those found on estesrockets.com <p><strong>Design</strong></p> <p>Using Fusion 360, I created a sketch with two center-diameter circles. I then extruded this sketch based on my measurements.</p> <p>I also used OpenSCAD to design some newer rings.</p> <h3>Custom Section</h3> <p><strong>Notes on exporting from OpenSCAD</strong></p> <p>OpenSCAD has the ability to export files in multiple formats. You can save it as an STL for 3D printing, or you can export an SVG, DXF, or PNG for laser cutting.</p> </div></p></p></p> Category: DIY