Let’s talk about 20mm Carbon Fiber Tubing
If you’re building something that needs to be stiff as a board but light enough to lift with a finger, you’re probably looking at our 20mm carbon fiber tubes. We make these for the people who are tired of the bulk and weight that comes with steel or aluminum. It’s basically a mix of carbon filaments and polymer. The result? A strength-to-weight ratio that makes most industrial metals look clumsy.
The deal with rigidity
A 20mm diameter gives you a really solid base for structural bracing. Now, here is the secret: carbon fiber behaves differently depending on how it’s woven. We use unidirectional fibers to keep things stiff lengthwise, but we mix in a cross-weave for “hoop strength.” That’s just a fancy way of saying the tube won’t cave in or crush when you put pressure on the sides. It just doesn’t budge. That’s why you’ll see these in drone frames, camera booms, or robotic arms. In those worlds, even a tiny bit of bend or “flex” can totally ruin your accuracy.
Weight and the temperature problem
Switching from steel to one of these tubes is a huge relief for your hardware. Your motors and actuators don’t have to fight nearly as much weight, which means they last longer and run smoother. Plus, there’s the temperature factor. Metal grows and shrinks when your shop gets hot or cold. Carbon fiber barely notices. It stays put, regardless of the weather.
A few things to watch out for
Here is the catch: you can’t treat carbon fiber like a piece of aluminum. You can’t weld it. Period. You’ll need to use high-strength epoxies or mechanical clamps to get it to stick. And a word of warning on the clamps—**don’t over-tighten them.**If you crank a metal collar down too hard on a thin-wall tube, you’ll crush the fibers. Once that happens, the tube is toast. We usually suggest using rubber inserts or sticking to a specific torque setting to keep things safe. One last thing. These tubes are absolute beasts when it comes to pulling or pushing forces. But they hate sharp, sudden impacts. If your project involves a lot of crashing or hitting hard edges, go with a thicker wall or slide a protective sleeve over the tube.