Model information
Description
These are replacement spacers for Axial SCX10 factory shocks to address leaking issues. The author replaces the original 1mm thickness Axial spacers with these 1.4mm thick spacers to increase pressure on the O-rings when the bottom cap is screwed on, resulting in a tighter seal. The author reports that after 9 months of use, the shocks have not shown signs of leakage and dampening behavior remains unaffected.
Printing tips:
At this small size, printer tolerances can make a difference. The author used a Průša MK4 with a 0.4mm nozzle and PET-G (White).
Print settings: The author used a 0.20mm structural profile as a baseline but lowered the layer height to 0.10mm to provide a smoother perimeter.
The author recommends printing a single spacer first to measure it. The outer diameter should match the original injection molded spacers. The inner diameter may be slightly smaller as long as the shock shaft glides smoothly. The thickness must be 1.40mm.
Shock rebuild instructions:
Rebuild the shocks as described in the manual, replacing the original spacers between the O-rings with these printed ones. Apply shock lubricant liberally around the O-rings. The bottom shock cap should fit, though it may feel slightly tighter than before.
OpenSCAD source is provided for adjusting tolerances.
Original text by the author on Printables
<h3>Axial SCX10 Shock Seals</h3><p>The SCX10 factory shocks are well known for their terrible leaking. I've tried a very simple approach at fixing this issue by replacing the spacers beween the O-rings at the shock body bottom.</p><p> </p><p>After this simple modification the shocks haven't shown any signs of leakage in over two weeks. Dampening behaviour seems unaffected.</p><p>Updates</p><ul><li>2025-01-28: 6 months later, the shocks are still perfectly fine. No more leaking for me.</li><li>2025-04-15: 9 months later, still no leaking.</li></ul><p> </p><p>The original spacer provided by Axial has 1mm thickness. These replacement spacers are 1.4mm. The idea is that the additional thickness will squeeze the o-rings just a tiny bit more when the bottom cap is screwed on which results in a tighter seal. Just enough to prevent the oil from escaping.</p><p> </p><h4>Printing tips</h4><p>At this small size tolerances of an individual printer can already make a difference. Here's what worked for me:</p><p> </p><p>Printer: Průša MK4</p><p>Nozzle: Your trusty 0.4mm nozzle is a good fit.</p><p>Material: PET-G, White is just what I had loaded at the time. :-) In hindsight it allows to easily distinguish the printed parts from the original black spacers.</p><p>Print settings: I started from the default <i>structural</i> 0.20mm printing profile as a baseline. The only change I made was to lower the layer height to 0.10mm to give the rings a smother perimeter. The result is a solid object anyway, which is what we need.</p><p>I recommend printing a single one and measure the resulting object. It should have the same <i>outer</i> diameter as the original injection molded spacers. The <i>inner</i> diameter may be slightly smaller as long as the shock shaft is able to smoothly glide. Thickness of the spacer must be 1.40mm.</p><p>Once you know the size is exact, print one for each shock you want to fix.</p><p> </p><h4>Shock rebuild</h4><p>Rebuild the shocks as described in the manual. Replacing the original spacers between the O-rings with these printed ones as you go. Apply shock lubricant liberally around the O-rings.</p><p>The bottom shock cap should go on just fine, maybe a tad tighter than before, but this just shows that the sealing should be better now.</p><p> </p><h5>OpenSCAD source</h5><p>The sourcecode for OpenSCAD is provided, so you can adjust tolerances to fit your printer if need be. Yes, the model is coded quite lazily, I admit that. </p><p> </p><h5>Please report back!</h5><p>Have you tried this shock-mod? Did it fix the shock leaking on your crawler? Please comment below!</p>
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