Door or Drawer Handle, back mounted M3 square nut - different sizes (parametric)

prusaprinters

<p>We needed a new door handle for an Ikea drawer that was back mounted. The idea was also to hide the screw and nut. I used variables in Fusion360 so you can just use it as “parametric” for your use case. Just let me know if you need other sizes.</p><h3><strong>Design focus</strong></h3><ul><li>Easy and fast to print</li><li>stable / rigid (printing orientation for maximum strength)</li><li>Only minimal bridging (for the square nuts and screw holes)</li><li>Should work with any material (Angles, bridging etc.)</li><li>Parametric (or at least as easy as possible to adapt for any desired size)</li><li>Hide the “seam” as good as possible (printing orientation)</li></ul><p>&nbsp;</p><h3><strong>Model types</strong></h3><p><strong>Model 01</strong></p><ul><li>2 square nuts each side (total 4 per handle)</li><li>Works perfect with only 1 nut inserted per side (I inserted only 1)</li><li>All the examples / standard parameter are for this model</li></ul><figure class="image"><img src="https://media.printables.com/media/prints/255272/rich_content/0a0b5458-b42f-4a78-b35f-cec445281481/v01-01.png#%7B%22uuid%22%3A%22dc8049e2-3871-4dca-9fcc-862b6476d57f%22%2C%22w%22%3A2083%2C%22h%22%3A978%7D"></figure><figure class="image"><img src="https://media.printables.com/media/prints/255272/rich_content/c6ae7096-bb27-4ef7-a541-df87f6e45020/v01-03-dimensions.png#%7B%22uuid%22%3A%2297c9cc89-603a-4c08-8383-04a4260e4f92%22%2C%22w%22%3A2085%2C%22h%22%3A562%7D"></figure><p>&nbsp;</p><p>&nbsp;</p><p><strong>Model 02 (obsolete)</strong></p><ul><li>3 square nut each side&nbsp;</li><li>overkill</li><li>The handle is to high for a standard use but may be useful for some special use case</li><li>obsolete, won't be designed further.</li></ul><figure class="image"><img src="https://media.printables.com/media/prints/255272/rich_content/cbbb1623-f279-4a94-bcf3-5d3278c61f86/v02-02.png#%7B%22uuid%22%3A%22fe3ada18-5ebd-4bc9-9c66-38161d53863a%22%2C%22w%22%3A1901%2C%22h%22%3A776%7D"></figure><p>&nbsp;</p><h3><strong>Consideration</strong></h3><ul><li>1 square nut as near as possible at the handle to hide it better (planned)</li><li>1 square nut to place into the handle during printing (with pausing the print) to completely hide it→on request, because some testing is needed)</li></ul><p>&nbsp;</p><h3><strong>Print settings</strong></h3><figure class="table"><table><tbody><tr><td><strong>Parameter</strong></td><td><strong>Setting</strong></td></tr><tr><td>Perimeters</td><td>Minimum 3</td></tr><tr><td>Infill</td><td>Minimum 20%</td></tr><tr><td>Material</td><td><p>Tested with PETG</p><p>Possible: ABS, ASA, PC (anything that is durable)</p><p>I wouldn't use PLA (UV light / Sun, impact strength etc.)</p></td></tr><tr><td>Others</td><td>I used a 0.4mm and a 0.6mm nozzle with 0.2mm layer height. Both came out perfectly</td></tr><tr><td>Prusa Slicer</td><td><ul><li>“Avoid Crossing Perimeters” (usefull for PETG and other material that is known for stringing and oozing</li><li>“Seam Position” = rear (if you print the part like showed here, you will have the “seam” at the position that can't be seen. This makes your print look better</li></ul></td></tr><tr><td>Printing orientation</td><td><figure class="image"><img src="https://media.printables.com/media/prints/255272/rich_content/170f2f90-925c-42a3-b388-1981e89038ef/printing-orientation01.png#%7B%22uuid%22%3A%225da0af13-b24f-41f9-8d39-1f7044d93f87%22%2C%22w%22%3A816%2C%22h%22%3A758%7D"></figure></td></tr></tbody></table></figure><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><h3><strong>Parameters</strong> that can be adjusted</h3><p>In Fusion360 you can adjust this parameter under: Solid→Modify→Change Parameters</p><figure class="table"><table><tbody><tr><td><strong>Parameter Description</strong></td><td><strong>Parameter</strong></td><td><strong>Standard</strong></td></tr><tr><td>Hole distance (this defines the length of the end product</td><td>Hole2Hole</td><td>118mm</td></tr><tr><td>The width of the handle (size for your hand)</td><td>HandleWidht</td><td>20mm</td></tr><tr><td>The width of the socket (in the dimension of the lenght of the total product)</td><td>HandleSocketWidth</td><td>20mm</td></tr><tr><td>You can set was screws you are going to use</td><td>ScrewDimension</td><td>3.1 mm (for M3)</td></tr><tr><td>The width that is used for the nut. If your square nut are wider or smaller you can adjust this parameter.</td><td>M3nutWidth</td><td>6.2mm</td></tr><tr><td>The height that is needed (inlcuding for bridging) that the square nut fits</td><td>M3nutHeight</td><td>2.2mm</td></tr><tr><td>The height of the total handle (from the drawer until the top of the part that you will have in the hand)</td><td>HandleHeight</td><td>40mm</td></tr><tr><td>This is the part of the handle that you will have in the hand. It is calculated by “HandleHeight - HandleDepth” (it is the part that will be cut out from the HandleHeight. I know it is a bit complicated but I didn't know how I could make it easyier the way I designed it)</td><td>HandleDepth</td><td>25mm</td></tr></tbody></table></figure><p>If your printer needs more tolerance, you can also adjust this parameters</p><p>&nbsp;</p><h3><strong>Naming convention</strong></h3><p>The Example is with the standard size I used for my project. I'm planning to add more versions later, so I started from the beginning with a naming convention</p><figure class="table"><table><tbody><tr><td><strong>Name</strong></td><td><strong>Parameter</strong></td><td><strong>Example</strong></td></tr><tr><td>Model(Amount of square nut per side etc.)</td><td>MO</td><td>MO01</td></tr><tr><td>Hole2Hole Distance</td><td>D</td><td>D118</td></tr><tr><td>Handle width</td><td>HW</td><td>HW20</td></tr><tr><td>Socket Width</td><td>SW</td><td>SW20</td></tr><tr><td>Handle Height</td><td>HH</td><td>HH40</td></tr><tr><td>Handle Size (the effective thickness of the part that you hold in your hand)</td><td>HS</td><td>HS15</td></tr><tr><td>Screw Type</td><td>M</td><td>M3</td></tr><tr><td>Version (if I have later to adjust anything)</td><td>V</td><td>01</td></tr></tbody></table></figure><p>&nbsp;</p><p>Example of the “Model1 standard” that is used: M01-D118-HW20-SW20-HH40-HS15-M3-V01.stl</p><p>&nbsp;</p><p>&nbsp;</p>