hinge-dat - rod-tie-dat - crank-dat - rod-dat
steel-stainless-dat - rod-stainless-steel-solid-dat - metal-dat
rod hinge
info
A "Rod" is a material shape (Geometry)
A rod is a raw, solid, cylindrical piece of material. It describes what it looks like, not what it does.
You can buy a "steel rod" from a hardware store.
That rod does nothing until you machine it or design it into a mechanism.
Analogy: A rod is like "lumber" (raw material).
A "Shaft" is a machine element (Function)
A shaft is a rotating machine component used to transmit power and torque from one part to another (like a motor shaft spinning a wheel). It describes what it does, not just what it looks like.
A shaft is highly engineered, often featuring specific keyways, steps, or splines to mount gears and bearings.
Analogy: A shaft is like a "table leg" (a finished product with a specific job).
size
3mm stainless-steel-solid-tube-dat - shaft-dat - ?
common parts
compare
| Feature | 3mm Solid Carbon Rod | 3mm Solid Stainless Steel Rod |
|---|---|---|
| Material | Carbon fiber (reinforced with epoxy) | Stainless steel (commonly 304 or 316) |
| Density / Weight | ~1.6 g/cm³ (lightweight) | ~8.0 g/cm³ (heavy) |
| Tensile Strength | ~600–1000 MPa | ~500–700 MPa |
| Flexural Strength / Stiffness | Very high stiffness (high modulus) | Lower stiffness compared to carbon |
| Impact / Shock Resistance | Brittle, can snap under sudden impact | Tough, can bend under load without breaking |
| Corrosion Resistance | Excellent (does not rust) | Good (resists corrosion, but can rust in harsh environments) |
| Weight-to-Strength Ratio | Extremely high (very strong per gram) | Low (heavier for same strength) |
| Practical Notes | Ideal for lightweight reinforcement, RC aircraft spars, hobby robotics | Better for impact-heavy or load-bearing metal parts, mechanical shafts |
Summary
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Carbon rod is much lighter and very stiff; for bending stiffness or lightweight structure, it is stronger per weight.
-
Stainless steel rod is heavier but tougher; it can withstand impact and bending better without snapping.
-
Conclusion:
- For lightweight RC planes, drones, or aerospace applications → 3mm carbon rod is preferred.
- For mechanical shafts or parts under heavy impact → 3mm stainless steel rod is safer.
- For lightweight RC planes, drones, or aerospace applications → 3mm carbon rod is preferred.
other
cantilevel
tube cross locker
vertical tube connector == water pipe joint
