Knobs for bolts and nuts - parametric with CAD

prusaprinters

<h5>General</h5><p>Parametric CAD design for knobs can be used for any size hex nuts and bolts. Choose knobs suitable for epoxying onto a bolt or nut or a “captured” design where the bolt or nut holds the knob in place without adhesive. Extra texture is provided for adhesion of epoxy in the hex head area with grooves and dimples.&nbsp;</p><h5>Print Instructions</h5><p>Print with hex pocket up, no support needed.</p><h5>1/4" SAE bolt &amp; nut ready-to-print files included</h5><p>Mesh files provided for these popular sizes and standard 1/4" or 9mm knob height, use Fusion 360 and provided parameters to create endless variations</p><h5>Captured vs Epoxy-In</h5><p>Because the “captured” knob designs pinches plastic between the fastener and clamping surface, this should be used for in low strength/force situations only. Some filament materials like PLA are highly susceptible to deformation under constant pressure, other materials like ABS/ASA can be more suitable for higher strength and durability “captured” knobs.</p><h5>Main Parameters</h5><ul><li><strong>BoltDiameter</strong> - Clearance hole size for bolt [nominal bolt size, e.g. 6mm for M6]</li><li><strong>BoltHeadFlatsDiameter</strong> - Bolt or Nut wrench size (wrench size)</li><li><strong>BoltHeadHeight</strong> - Thickness of nut or bolt head</li><li><strong>Captured</strong> - use 1 for “captured” knob, 0 for “epoxy-in”</li><li><strong>ForceThroughHoleForNut</strong> - use 0 for “epoxy-in” bolt knob, 1 for epoxy in nut knob</li><li><strong>KnobHeight</strong> - total height of knob</li><li><strong>Grooves</strong> - number of finger grip grooves around knob &nbsp;</li></ul><h5>Instructions to generate knobs for other fastener sizes:</h5><ul><li>Launch Fusion 360</li><li>Pick <i><strong>File</strong></i> &gt; <i><strong>Open…</strong></i>&nbsp;</li><li>Choose the .f3d file</li><li>SHIFT-P &nbsp;[<i><strong>Modify</strong></i> &gt; <i><strong>Change Parameters</strong></i>]</li><li>Update values for <strong>BoltDiameter</strong>, <strong>BoltHeadFlatsDiameter</strong>, <strong>BoltHeadHeight</strong> parameters (follow number with <i><strong>mm</strong></i> for millimeters or <i>double-quotes</i> for inches)</li><li>Choose 1 or 0 values “Captured” and “ForceThroughHoleForNut”</li><li>Export as .3mf or .stl&nbsp;<ul><li>Right click top item in browser</li><li>Choose <strong>Save As Mesh</strong></li><li>Pick <strong>OK</strong></li></ul></li><li>Enter filename, <strong>Save</strong></li></ul>