Saw Guide Collar for cutting 1" or 1-1/8" Bike Steerer Tube

prusaprinters

<p>Saw Guide or Cut Guide collars for cutting bike steerer tubes down to size. <strong>Designed for Metal Steerer Tubes. </strong>Slightly undersized to ensure a tight fit on the steerer.&nbsp;</p><p><i><strong>Carbon Steerer Warning:</strong></i></p><p><i>Clamping anything on a carbon steerer tube without internal support can result in invisible delamination damage and steerer tube failure. <strong>These clamps are not designed for carbon steerer tubes and should be used at your own risk.</strong> If you decide to use these on a carbon steerer tube, minimal clamping force is recommended and they should probably be slightly scaled up to be a slip fit on the steerer.&nbsp;</i></p><p><strong>Print specs:</strong></p><p>Works well printed in PLA @ 65% infill @.3mm layer height</p><p>Collars are 17mm tall. Reduce as needed before printing.</p><p>Tinkercad file: https://www.tinkercad.com/embed/2PW2VmnAyaU</p><p><strong>Intended hardware</strong>:</p><p>1x 3/16" (4.7mm) diameter bolt approximately 1"(25.4mm) long &nbsp;with bolt head no wider than 3/8"(9.5mm)</p><p>1x nut measuring ~3/8" flat to flat (9.5mm)</p><p>Bolt hole is slighty undersized. Can be drilled out for a larger bolt. 3/16th bolt will cut threads in plastic which may be sufficient without a nut. (heat your bolt and nut in boiling water before install to get a “heat set” fit)</p><p><strong>Use:</strong></p><p><strong>Measure twice, cut once! You can't undo a steerer cut and you can always use spacers to account for a steerer slightly too long. Having to cut a second time is always better than cutting too short the first time. </strong><i>Cut slowly and use light pressure for best results. Let the saw do the work.</i></p><p><i>For threaded steerers, thread the top adjustable race onto the steer then attach your collars. This will allow you to clean up the threads by unscrewing it after cutting.</i></p><p>Collars are slightly undersized to ensure a tight fit on the steerer. spread the collar to slide it on the steerer.&nbsp;</p><p>Use the saw blade to set the gap between collars. The saw will widen the gap as you cut by removing collar material.&nbsp;</p><p>If there is too much friction, increase the gap slightly. On threaded steerers, the top collar can be “unthreaded” to micro adjust the gap.</p><p>Will work at least twice by flipping the collars around for the second cut. will work multiple times if the surfaces touching the saw blade sides are still flat.</p><p>Once the blade is ¼ of the way through the steerer, the top collar can be backed off or possibly even removed to reduce friction on the blade.</p><p>Finish the cut with a file or rasp to remove and burrs and bevel the top edge to roughly 45 degrees. This allows for easier threading of the headset cups.</p>